TY - JOUR A1 - Blome, Hans-Joachim A1 - Wilson, Thomas L. T1 - The quantum temperature of accelerating cosmological models of an entangled Universe JF - Advances in Space Research. 35 (2005), H. 1 Y1 - 2005 SN - 0273-1177 SP - 111 EP - 115 ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Priester, Wolfgang T1 - Vacuum energy in cosmic dynamics JF - Astrophysics and Space Science. 117 (1985), H. 2 Y1 - 1985 SN - 0004-640X SP - 327 EP - 335 ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Priester, W. T1 - Big Bounce in the very early Universe JF - Astronomy and Astrophysics. 250 (1991), H. 1 Y1 - 1991 SN - 0004-6361 SP - 43 EP - 49 ER - TY - JOUR A1 - Bullerschen, Klaus-Gerd A1 - Wilhelmi, Herbert A1 - Wimmer, W. T1 - Influence of non-uniform material properties and water cooling on current density and temperature profiles in arc furnace elektrodes JF - Steel Research. 56 (1985), H. 11 Y1 - 1985 SN - 0177-4832 SP - 559 EP - 564 ER - TY - JOUR A1 - Blome, Hans-Joachim T1 - The scale of the universe: a unit of length JF - Comments on astrophysics. 17 (1994) Y1 - 1994 SN - 0146-2970 SP - 327 EP - 335 ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Kundt, Wolfgang T1 - Leptonic jets from young stellar objects? JF - Astrophysics and Space Science. 148 (1988), H. 2 Y1 - 1988 SN - 0004-640X SP - 343 EP - 361 ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Chu, Y. A1 - Hoell, J A1 - Priester, W. T1 - On the observational discrimination of Friedmann-Lemaître models JF - Large Scale Structures of the Universe: Proceedings of the 130th Symposium of the International Astronomical Union, dedicated to the memory of Marc A. Aaronson (1950-1987) held in Balatonfured, Hungary, June 15-20, 1987. Edited by Jean Audouze, Marie-Christine Pelletan and Sandor Szalay. Y1 - 1988 SN - 90-277-2742-2 N1 - International Astronomical Union. Symposium no. 130 SP - 517 PB - Kluwer Academic Publishers CY - Dordrecht ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Wilson, Thomas L. T1 - The entangled Universe JF - Relativistic Astrophysics and Cosmology, Proceedings of the 13th Course of the International School of Cosmic Ray Astrophysics, held in Erice, Italy, 2-14 June 2002 / edited by Maurice M. Shapiro ... [et al.] Y1 - 2004 SN - 981-238-727-7 SP - 23 EP - 38 PB - World Scientific Publishing CY - New Jersey, NJ ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Mashhoon, B. T1 - Quasi-normal oscillations of a Schwarzschild black hole JF - Physics Letters A. 100 (1984), H. 5 Y1 - 1984 SN - 0375-9601 SP - 231 EP - 234 ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Kundt, W. T1 - Hypersonic Jets from Young Stars in Molecular Clouds JF - Circumstellar matter : proceedings of the 122nd symposium of the Internat. Astronom. Union held in Heidelberg, FRG, June 23 - 27, 1986 / ed. by I. Appenzeller ... Y1 - 1987 SN - 90-277-2511-X SP - 73 EP - 74 PB - Reidel CY - Dordrecht u.a. ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Priester, Wolfgang T1 - The problem of the primeval explosion: 'Big bang' or 'big bounce'? I JF - Sterne und Weltraum. 26 (1987) Y1 - 1987 SN - 0039-1263 SP - 83 EP - 89 ER - TY - JOUR A1 - Esch, Thomas A1 - Salber, Wolfgang A1 - Wolters, Peter A1 - Geiger, José A1 - Dilthey, Jochen T1 - Synergies of variable valve actuation and direct injection JF - Direct injection SI engine technology 2002 : [SAE 2002 world congress, Detroit, Michigan, USA, March 4 - 7, 2002]. Y1 - 2002 SN - 0-7680-0961-8 N1 - Konferenz-Einzelbericht SP - 45 EP - 53 PB - Society of Automotive Engineers CY - Warrendale, Pa ER - TY - JOUR A1 - Esch, Thomas T1 - Optimized design of the lubrication system of modern combustion engines. Verbesserte Ausführung von Schmierungssystemen bei modernen Verbrennungsmotoren Y1 - 1991 SN - 0148-7191 U6 - https://doi.org/10.4271/912407 N1 - Konferenz-Einzelbericht : SAE technical papers / Society of Automotive Engineers, Paper-Nr. 912407 SP - 1 EP - 11 ER - TY - JOUR A1 - Gerhardt, Hans Joachim A1 - Kramer, C. T1 - Aerodynamsiche RA-Optimierung JF - Zentralblatt fuer Industriebau. 31 (1985), H. 5 Y1 - 1985 SN - 0044-4227 SP - 358 EP - 362 ER - TY - JOUR A1 - Gerhardt, Hans Joachim A1 - Kramer, C. A1 - Janssen, L.-J. T1 - Flow studies of an open jet wind tunnel and comparison with closed and slotted walls Y1 - 1985 N1 - Konferenz-Einzelbericht: 6th Colloquium on Industrial Aerodynamics, Road Vehicle Aerodynamics, Fachhochschule Aachen, 19.-21.6.1985 SP - 7 EP - 28 ER - TY - JOUR A1 - Gerhardt, Hans Joachim A1 - Cooper, K.-R. A1 - Whitbread, R. A1 - Gary, K.-P. (u.a.) T1 - A comparison of aerodynamic drag measurements on model trucks in closed-jet and open-jet wind tunnels Y1 - 1985 N1 - Konferenz-Einzelbericht : 6th Colloquium on Industrial Aerodynamics, Road Vehicle Aerodynamics, Fachhochschule Aachen, 19.-21.6.1985 SP - 261 EP - 274 ER - TY - JOUR A1 - Schmitz, Günter A1 - Roetert, J. A1 - Pischinger, M. T1 - A Fast Intelligent VMEbus System for Combustion Analysis in Engines JF - 19th [nineteenth] International Symposium on Automotive Technology & [and] Automation : with particular reference to cell control and quality management systems for the manufacturing industries; Monte Carlo, 24. - 28. October 1988. Y1 - 1988 SN - 0947719229 SP - 381 EP - 391 PB - Automotive Automation Ltd CY - Croydon ER - TY - JOUR A1 - Bullerschen, Klaus-Gerd A1 - Wilhelmi, Herbert T1 - Cooling of arc furnace electrodes with heat pipes JF - Chemical Engineering & Technology. 14 (1991), H. 1 Y1 - 1991 SN - 0930-7516 SP - 45 EP - 53 ER - TY - JOUR A1 - Dahl, Günter A1 - Suttrop, F. T1 - Engine control and low-NO(x) combustion for hydrogen fuelled aircraft gas turbines JF - International Journal of Hydrogen Energy. 23 (1998), H. 8 Y1 - 1998 SN - 0360-3199 SP - 695 EP - 704 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Ulamec, S A1 - Richter, L T1 - Lander Systems for Planetary Missions JF - Laboratory astrophysics and space research / ed. by P. Ehrenfreund Y1 - 1999 SN - 0-7923-5338-2 N1 - Serie Astrophysics and space science library 236 SP - 597 EP - 621 PB - Kluwer CY - Dordrecht [u.a.] ER - TY - JOUR A1 - Wittmann, Klaus A1 - Schmidt, H. P. A1 - Feuerbacher, B. T1 - Microgravity research and user support in the Space Station era: The Microgravity User Support Centre JF - Acta Astronautica. 17 (1988), H. 11-12 Y1 - 1988 SN - 0094-5765 SP - 1161 EP - 1168 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Feuerbacher, B. A1 - Ulamec, S. A1 - Rosenbauer, H. (u.a.) T1 - Rosetta Lander - In Situ Characterisation of a Comet Nucleus JF - Acta Astronautica. 45 (1999), H. 4-9 Y1 - 1999 SN - 0094-5765 SP - 389 EP - 395 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Gillessen, F. A1 - Otto, G. A1 - Röstel, R. T1 - Undercooling and solidification of metallic melts suspended in a non-nucleating matrix: Experiment NUCAL of the German Spacelab Mission D-2 JF - Acta Astronautica. 38 (1996), H. 1 Y1 - 1996 SN - 0094-5765 SP - 63 EP - 68 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Kell, G. A1 - Winkler, F. A1 - Günther, M. (u.a.) T1 - High resolution temperature measurement technique for materials sciences experiments in space JF - Acta Astronautica. 43 (1998), H. 7-8 Y1 - 1998 SN - 0094-5765 SP - 385 EP - 395 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Bewersdorff, A. A1 - Görler, G.P. A1 - Otto, G. T1 - Solidification of silver-germanium alloys in an amorphous matrix aboard the space station Mir JF - Acta Astronautica. 29 (1993), H. 7 Y1 - 1993 SN - 0094-5765 SP - 547 EP - 552 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Ulamec, S. A1 - Feuerbacher, B. A1 - Rosenbauer, H. T1 - Technical Challenge, Scientific Thrill: A Long Term Lander on an Active Comet JF - Lunar and Planetary Science. 26 (1995) Y1 - 1995 SN - 0270-9511 N1 - Proceedings of the 26th Lunar and Planetary Science Conference / org. by Lunar and Planetary Institute, Houston Texas SP - 1431 EP - 1432 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Ulamec, S. A1 - Feuerbacher, B. A1 - Rosenbauer, H. (u.a.) T1 - Rosetta Lander - In Situ Investigation of a Cometary Nucleus JF - Lunar and Planetary Science. 28 (1997) Y1 - 1997 SN - 0270-9511 N1 - Proceedings of the 28th Annual Lunar and Planetary Science Conference, March 17-21, 1997, Houston, Texas SP - 1461 EP - 1462 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Padeken, D. T1 - The User Center for Microgravity MUSC - Support for space experiments JF - DLR-Nachrichten. 70 (1993) Y1 - 1993 SN - 0937-0420 SP - 19 EP - 24 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Schmidt, H. P. A1 - Padeken, D. A1 - Hildmann, B. T1 - The Microgravity User Support Centre (MUSC) JF - ESA SP. 277 (1988) Y1 - 1988 SN - 0379-6566 N1 - Proceedings of the International Symposium on Europe in Space--the Manned Space System : 25-29 April 1988, Strasbourg, France David, Valerie ; Longdon, Norman [ed] SP - 525 ER - TY - JOUR A1 - Wittmann, Klaus T1 - The microgravity User Support Centre JF - Space Technology - Industrial and Commercial Applications. 13 (1993), H. 2 Y1 - 1993 SN - 0892-9270 SP - 121 EP - 124 ER - TY - JOUR A1 - Wittmann, Klaus A1 - Fortezza, R. T1 - Telescience opportunities in the precursor flights JF - Space Technology - Industrial and Commercial Applications. 13 (1992), H. 2 Y1 - 1992 SN - 0892-9270 SP - 221 EP - 226 ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Wilson, Thomas L. T1 - Observational cosmology from the moon. Wilson, Thomas, L.; Blome, Hans-Joachim JF - Engineering, construction, and operations in space V : proceedings of the Fifth International Conference on Space '96, Albuquerque, New Mexico, June 1-6, 1996 / sponsored by Aerospace Division of the American Society of Civil Engineers ... [et al.]; edite Y1 - 1996 SN - 0-7844-0177-2 SP - 864 EP - 870 PB - The Society CY - New York ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Wilson, Thomas L. T1 - Nanotechnology and Orbital Debris JF - Engineering, construction, and operations in space V : proceedings of the Fifth International Conference on Space '96, Albuquerque, New Mexico, June 1-6, 1996 / sponsored by Aerospace Division of the American Society of Civil Engineers ... [et al.]; edite Y1 - 1996 SN - 0-7844-0177-2 SP - 328 EP - 333 PB - The Society CY - New York ER - TY - JOUR A1 - Wilson, Thomas L A1 - Blome, Hans-Joachim A1 - LaFave, Norman T1 - Astrophysical Cosmology Using a Lunar Ligo JF - Engineering, construction, and operations in space V : proceedings of the Fifth International Conference on Space '96, Albuquerque, New Mexico, June 1-6, 1996 / sponsored by Aerospace Division of the American Society of Civil Engineers ... [et al.]; edite Y1 - 1996 SN - 0-7844-0177-2 SP - 861 EP - 863 PB - The Society CY - New York ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Priester, W. A1 - Hoell, J. T1 - New Ways in Cosmology: II. Alternative Models for the Very Early Universe JF - Currents in high energy astrophysics : proceedings of the NATO Advanced Study Institute and Ninth Course of the International School of Cosmic Ray Astrophysics on Currents in High Energy Astrophysics, Ettore Majorana Centre, Erice, Sicily, Italy, 7 - 18 M Y1 - 1995 SN - 0-7923-3354-3 SP - 301 EP - 312 PB - Kluwer CY - Dordrecht [u.a.] ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Priester, W. A1 - Hoell, J. T1 - New Ways in Cosmology: I. Friedmann-Lemaitre Model Derived From the Lyman Alpha Forest in Quasar Spectra JF - Currents in high energy astrophysics : proceedings of the NATO Advanced Study Institute and Ninth Course of the International School of Cosmic Ray Astrophysics on Currents in High Energy Astrophysics, Ettore Majorana Centre, Erice, Sicily, Italy, 7 - 18 M Y1 - 1995 SN - 0-7923-3354-3 SP - 291 EP - 300 PB - Kluwer CY - Dordrecht [u.a.] ER - TY - JOUR A1 - Harder, Jörn T1 - A crystallographic model for the study of local deformation processes in polycrystals JF - International journal of plasticity. 15 (1999), H. 6 Y1 - 1999 SN - 0749-6419 N1 - Online: http://opus.tu-bs.de/opus/volltexte/1999/10/pdf/10_1.pdf SP - 605 EP - 624 ER - TY - JOUR A1 - Schmitz, Günter T1 - Mechatronic Systems Simulation as an obligatory module for Mechatronic Master Students JF - Mechatronics & Robotics 2004 : Aachen, Germany, September 13 - 15, 2004 / [IEEE Industrial Electronics Society ...] P. Drews (ed.) Y1 - 2004 SN - 3-938153-50-X SP - 1278 PB - Eysoldt CY - Aachen ER - TY - JOUR A1 - Schmitz, Günter A1 - Oligschläger, U. A1 - Eifler, G. A1 - Lechner, H. T1 - Automated System for Optimized Calibration of Engine Management Systems Y1 - 1994 N1 - SAE International Congress and Exposition, Detroit, Feb. 28 - March 3 ; SAE- Paper-No.: 940151 ; ; PowerMEMS ; 7 Y1 - 2007 SP - 367 EP - 370 ER - TY - JOUR A1 - Robinson, A. E. A1 - Rönna, Uwe A1 - Funke, Harald T1 - Testing of a 10 kW diffusive micro-mix combustor for hydrogen-fuelled micro-scale gas turbines JF - International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications <7, 2007, Freiburg, Breisgau> ; PowerMEMS ; 7 Y1 - 2007 SP - 225 EP - 228 ER - TY - JOUR A1 - Funke, Harald A1 - Börner, Sebastian A1 - Falk, F. A1 - Hendrick, P. T1 - Control system modifications and their effects on the operation of a hydrogen-fueled Auxiliary Power Unit JF - XX international symposium on air breathing engines 2011 : ISABE 2011, Gothenburg, Sweden, 12-16 September, 2011. Vol. 2. Y1 - 2011 SN - 9781618391803 N1 - 20th International Symposium on Air Breathing Engines 2011 : (ISABE 2011) : Gothenburg, Sweden, 12-16 September, 2011. SP - 929 EP - 938 PB - American Institute of Aeronautics and Astronautics CY - Reston, VA ER - TY - JOUR A1 - Funke, Harald A1 - Robinson, A. E. A1 - Hendrick, P. A1 - Wagemakers, R. T1 - Design and Testing of a Micromix Combustor With Recuperative Wall Cooling for a Hydrogen Fuelled µ-Scale Gas Turbine JF - Proceedings of the ASME Turbo Expo 2010 : presented at the 2010 ASME Turbo Expo, June 14 - 18, 2010, Glasgow, UK / sponsored by the International Gas Turbine Institute / Vol. 5: Industrial and cogeneration ; microturbines and small turbomachinery ; oil and gas applications ; wind turbine technology Y1 - 2010 SN - 978-0-7918-4400-7 N1 - GT2010-23453 ; ASME Turbo Expo ; (Glasgow) : 2010.06.14-18 SP - 587 EP - 596 PB - ASME CY - New York, NY ER - TY - JOUR A1 - Robinson, A. E. A1 - Funke, Harald A1 - Wagemakers, R. A1 - Grossen, J. A1 - Bosschaerts, W. A1 - Hendrick, P. T1 - Numerical and Experimental Investigation of a Micromix Combustor for a Hydrogen Fuelled μ-Scale Gas Turbine JF - Proceedings of the ASME Turbo Expo 2009 : : presented at the 2009 ASME Turbo Expo, June 8 - 12, 2009, Orlando, Florida, USA / sponsored by the International Gas Turbine Institute Y1 - 2009 SN - 9780791848869 N1 - GT2009-60061 SP - 253 EP - 262 PB - ASME CY - New York, NY ER - TY - JOUR A1 - Bohn, D. A1 - Funke, Harald A1 - Gier, J. T1 - Temperature jet development in a cross-over channel JF - Third European Conference on Turbomachinery - fluid dynamics and thermodynamics : : 2 - 5 March 1999, Royal National Hotel, London, UK / organized by the Energy Transfer and Thermofluid Mechanics Group of the Institution of Mechanical Engineers (IMechE); with support and sponsorship from European Commission / Vol. B. Y1 - 1999 N1 - C557/158/99 ; IMechE conference transactions 1999-1B SP - 671 EP - 680 PB - Professional Engineering Publ. CY - Bury St. Edmunds ER - TY - JOUR A1 - Bohn, Dieter A1 - Funke, Harald A1 - Heuer, Tom A1 - Bütikofer, J. T1 - Numerical and experimental investigations of the influence of different swirl-ratios on the temperature streak equalization in a 4-stage turbine JF - ASME Turbo Expo 2000 ; Munich, May 8-11 2000 Y1 - 2000 N1 - ASME-paper ; 2000-GT-250 CY - Munich ER - TY - JOUR A1 - Bohn, Dieter A1 - Funke, Harald A1 - Sürken, Norbert A1 - Kreitmeier, F. T1 - Numerical and experimental investigations on endwall contouring in a four-stage turbine JF - ASME Turbo Expo Land Sea & Air 2001 : June 4 - 8, 2001, New Orleans, Louisiana / IGTI, International Gas Turbine Institute. American Society of Mechanical Engineers. International Gas Turbine Institute .. Y1 - 2001 SN - 0-7918-3528-6 N1 - ASME-Paper 2001-GT-0481 PB - ASME CY - New York, NY ER - TY - JOUR A1 - Funke, Harald A1 - Rönna, Uwe A1 - Robinson, A. E. T1 - Development and testing of a 10 kW diffusive micromix combustor for hydrogen-fuelled μ-scale gas turbines JF - Proceedings of ASME Turbo Expo 2008: Power for Land, Sea and Air ; GT2008 ; June 9-13, 2008, Berlin, Germany Y1 - 2008 N1 - GT2008-50418 SP - 1 EP - 8 PB - ASME CY - New York, NY ER - TY - JOUR A1 - Funke, Harald A1 - Börner, Sebastian A1 - Krebs, W. A1 - Wolf, E. T1 - Experimental Characterization of Low NOx Micromix Prototype Combustors for Industrial Gas Turbine Applications JF - ASME Turbo Expo 2011 ; Vancouver, Canada, June 6-10, 2011 Y1 - 2011 N1 - GT2011-45305 ER - TY - JOUR A1 - Robinson, A. E. A1 - Funke, Harald A1 - Hendrick, P. T1 - Design and Testing of a Micromix Combustor With Recuperative Wall Cooling for a Hydrogen Fueled µ-Scale Gas Turbine JF - Journal of engineering for gas turbines and power Y1 - 2011 SN - 1528-8919 VL - 133 IS - 8 PB - ASME CY - New York ER - TY - JOUR A1 - Börner, Sebastian A1 - Funke, Harald A1 - Hendrick, P. A1 - Recker, E. T1 - Control system modifications for a hydrogen fuelled gas-turbine JF - ISROMAC 13, 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, HI, US, Apr 4-7, 2010 Y1 - 2010 SN - 978-1-617-38848-4 SP - 665 EP - 670 PB - Curran CY - Red Hook, NY ER - TY - JOUR A1 - Havermann, Marc A1 - Kainuma, M. A1 - Takayama, K. T1 - Influence of Physical and Geometrical Parameters on Vortex Rings Generated by a Shock Tube / Havermann, M. ; Kainuma, M. ; Takayama, K. JF - Non-lethal options enhancing security and stability : 3rd European Symposium on Non-Lethal Weapons, May 10 - 12, 2005, Ettlingen, Germany / ICT, Fraunhofer-Institut Chemische Technologie; European Working Group Non-Lethal Weapons Y1 - 2005 N1 - European Symposium on Non-Lethal Weapons ; (3 ; 2005.5.10-12 ; Ettlingen); V 24 PB - ICT CY - Pfinztal ER - TY - JOUR A1 - Havermann, Marc A1 - Moeglin, J.-P. T1 - ISL's Research on Systems with Controlled Effects for Non-Lethal Applications / Moeglin, J.-P. ; Havermann, M. et al. JF - Non-lethal options enhancing security and stability : 3rd European Symposium on Non-Lethal Weapons, May 10 - 12, 2005, Ettlingen, Germany / ICT, Fraunhofer-Institut Chemische Technologie; European Working Group Non-Lethal Weapons Y1 - 2005 N1 - European Symposium on Non-Lethal Weapons ; (3 ; 2005.5.10-12 ; Ettlingen); P 35 PB - ICT CY - Pfinztal ER - TY - JOUR A1 - Havermann, Marc A1 - Haertig, J. A1 - Rey, C. A1 - George, F. T1 - PIV measurements in Mach 3.5 and 4.5 shock tunnel flow / Haertig, J. ; Havermann, M. ; Rey, C. ; George, F. Y1 - 2001 N1 - AIAA-2001-699 Aerospace Sciences Meeting and Exhibit, 39th, Reno, NV, Jan. 8-11, 2001 PB - - ER - TY - JOUR A1 - Havermann, Marc T1 - Systematic Shock Tube Experiments on Vortex Ring Generation and Propagation / Havermann, M. ; Kainuma, M. ; Takayama, K. JF - Shock waves : proceedings of the 25th International Symposium on Shock Waves-ISSW25, July 17 - 22, 2005, Bangalore, India / ed.: G. Jagadeesh Y1 - 2006 SN - 978-81-7371571-6 N1 - International Symposium on Shock Waves ; 25 (Bangalore) : 2005.07.17-22 ISSW ; 25 (Bangalore) : 2005.07.17-22 PB - Universities Pr. CY - Hyderabad ER - TY - JOUR A1 - Funke, Harald A1 - Robinson, A. E. T1 - Development of a new test rig for a micro scale hydrogen combustion chamber JF - Proceedings of the 2nd European Conference for Aero-Space Sciences : July 1 - 6, 2007, Brussels, Belgium Y1 - 2007 N1 - European Conference for Aerospace Sciences <2, 2007, Brüssel> ; EUCASS <2, 2007, Brüssel> ; Paper No. 22 SP - 1 EP - 8 PB - - ER - TY - JOUR A1 - Lettini, Antonio A1 - Havermann, Marc A1 - Guidetti, Marco A1 - Fornaciari, Andrea T1 - Improved functionalities and energy saving potential on mobile machines combining electronics with flow sharing valve and variable displacement pump JF - IFK 7, 7th International Fluid Power Conference, Efficiency through Fluid Power, 7. Internationales Fluidtechnisches Kolloquium, Workshop Proceedings, Vol. 3, Aachen, DE, 22.-24. Mar, 2010 Y1 - 2010 SN - 978-3-940565-92-1 N1 - IFK, 7, Internationales Fluidtechnisches Kolloquium, 7., Aachen, DE, 2010-03-22 - 2010-03-24 SP - 103 EP - 114 PB - - ER - TY - JOUR A1 - Havermann, Marc A1 - Seiler, F. T1 - Boundary Layer Influence on Supersonic Jet/Cross-Flow Interaction in Hypersonic Flow / Havermann, M. ; Seiler, F. JF - Notes on Numerical Fluid Mechanics and Multidisciplinary Design. 92 (2006) Y1 - 2006 SN - 1612-2909 N1 - New results in numerical and experimental fluid mechanics ; V ; ISBN 978-3-540-33287-9 SP - 281 EP - 288 PB - - ER - TY - JOUR A1 - Havermann, Marc A1 - Haertig, J. A1 - Rey, C. A1 - George, A. T1 - Particle image velocimetry in mach 3.5 and 4.5 shock-tunnel flows / Haertig, J. ; Havermann, M. ; Rey, C. ; George, A. JF - AIAA journal. 40 (2002), H. 6 Y1 - 2002 SN - 0001-1452 N1 - Printausgabe in der Bereichsbibliothek Eupener Str. Signatur: 23 Z 701 SP - 1056 EP - 1060 PB - - ER - TY - JOUR A1 - Havermann, Marc A1 - Haertig, J. A1 - Rey, C. A1 - George, A. T1 - PIV Measurements in Shock Tunnels and Shock Tubes / Havermann, M. ; Haertig, J. ; Rey, C. ; George, A. JF - Particle Image Velocimetry : New Developments and Recent Applications Y1 - 2008 SN - 978-3-540-73528-1 N1 - Topics in applied physics. Vol 112. SP - 429 EP - 442 PB - Springer CY - Berlin ER - TY - JOUR A1 - Havermann, Marc A1 - Seiler, F. A1 - Georges, A. A1 - Srulijes, J. T1 - Progress in Doppler picture velocimetry (DPV) / Seiler, F. ; George, A. ; Srulijes, J. ; Havermann, M. JF - Experiments in Fluids. 44 (2008), H. 3 Y1 - 2008 SN - 1432-1114 SP - 389 EP - 395 PB - - ER - TY - JOUR A1 - Pichler, A. A1 - George, A. A1 - Seiler, F. A1 - Srulijes, J. A1 - Havermann, Marc T1 - Doppler Picture Velocimetry (DPV) applied to hypersonics JF - Shock Waves [Elektronische Ressource] : 26th International Symposium on Shock Waves, Volume 1 / edited by Klaus Hannemann, Friedrich Seiler Y1 - 2009 SN - 978-3-540-85168-4 N1 - International Symposium on Shock Waves ; (26 ; 2007.07.15-20 ; Göttingen) ; ISSW ; (26 ; 2007.07.15-20 ; Göttingen) SP - 503 EP - 508 PB - Springer CY - Berlin ER - TY - JOUR A1 - Havermann, Marc A1 - Seiler, F. A1 - George, A. A1 - Leopold, F. T1 - Planar Velocity Visualization in High-Speed Wedge Flow using Doppler Picture Velocimetry (DPV) compared with Particle Image Velocimetry (PIV) / Seiler, F. ; Havermann, M. ; George, A. ; Leopold, F. ; Srulijes, J. JF - Journal of Visualization. 6 (2003), H. 3 Y1 - 2003 SN - 1343-8875 SP - 253 EP - 262 PB - - ER - TY - JOUR A1 - Havermann, Marc A1 - Beylich, A. E. T1 - Performance and Limitations of the Laser-Induced Fluorescence Measurement Technique and the Established Experimental Methods for the Study of Supersonic Mixing / Havermann, M. ; Beylich, A. E. JF - International Journal of heat and technology. 15 (1997), H. 2 Y1 - 1997 SP - 3 EP - 10 PB - - ER - TY - JOUR A1 - Havermann, Marc T1 - Effects of the shock tube open-end shape on vortex loops released from it / Kainuma, M. ; Havermann, M. ; Sun, M. ; Takayama, K. JF - Shock Waves : Proceedings of the 24th International Symposium on Shock Waves Beijing, China July 11-16, 2004 / edited by Z. Jiang Y1 - 2005 SN - 978-3-540-22497-6 SP - 505 EP - 510 PB - Springer CY - Berlin ER - TY - JOUR A1 - Havermann, Marc A1 - Seiler, F. A1 - Boller, F. A1 - Mangold, P. T1 - Operation of the ISL transonic shock tube in a high subsonic flow regime / Seiler, F. ; Havermann, M. ; Boller, F. ; Mangold, P. ; Takayama K. JF - Shock Waves : Proceedings of the 24th International Symposium on Shock Waves Beijing, China July 11-16, 2004 / edited by Z. Jiang Y1 - 2005 SN - 978-3-540-22497-6 SP - 307 EP - 312 PB - Springer CY - Berlin ER - TY - JOUR A1 - Havermann, Marc A1 - Ende, H. A1 - Seiler, F. A1 - Schwenzer, M. T1 - Shock tunnel measurement of the interaction amplification factor for a hot gas side jet in a supersonic cross flow / Havermann, M. ; Ende, H. ; Seiler, F. ; Schwenzer, M. JF - Shock Waves : Proceedings of the 24th International Symposium on Shock Waves Beijing, China July 11-16, 2004 / edited by Z. Jiang Y1 - 2005 SN - 978-3-540-22497-6 SP - 113 EP - 118 PB - Springer CY - Berlin ER - TY - JOUR A1 - Kowalski, Julia A1 - McElwaine, Jim N. T1 - Shallow two-component gravity-driven flows with vertical variation JF - Journal of Fluid Mechanics Y1 - 2013 SN - 0022-1120 VL - 714 SP - 434 EP - 462 PB - Cambridge Univ. Press CY - Cambridge ER - TY - JOUR A1 - Olaru, Alexandra Maria A1 - Kowalski, Julia A1 - Sethi, Vaishali A1 - Blümich, Bernhard T1 - Exchange relaxometry of flow at small Péclet numbers in a glass bead pack JF - Journal of Magnetic Resonance (JMR) N2 - In this paper we consider low Péclet number flow in bead packs. A series of relaxation exchange experiments has been conducted and evaluated by ILT analysis. In the resulting correlation maps, we observed a collapse of the signal and a translation towards smaller relaxation times with increasing flow rates, as well as a signal tilt with respect to the diagonal. In the discussion of the phenomena we present a mathematical theory for relaxation exchange experiments that considers both diffusive and advective transport. We perform simulations based on this theory and discuss them with respect to the conducted experiments. KW - NMR exchange relaxometry KW - Low-field NMR Y1 - 2012 U6 - https://doi.org/10.1016/j.jmr.2012.04.015 SN - 1096-0856 VL - 220 SP - 32 EP - 44 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Fischer, Jan-Thomas A1 - Kowalski, Julia A1 - Pudasaini, Shiva P. T1 - Topographic curvature effects in applied avalanche modelling JF - Cold Regions Science and Technology N2 - This paper describes the implementation of topographic curvature effects within the RApid Mass MovementS (RAMMS) snow avalanche simulation toolbox. RAMMS is based on a model similar to shallow water equations with a Coulomb friction relation and the velocity dependent Voellmy drag. It is used for snow avalanche risk assessment in Switzerland. The snow avalanche simulation relies on back calculation of observed avalanches. The calibration of the friction parameters depends on characteristics of the avalanche track. The topographic curvature terms are not yet included in the above mentioned classical model. Here, we fundamentally improve this model by mathematically and physically including the topographic curvature effects. By decomposing the velocity dependent friction into a topography dependent term that accounts for a curvature enhancement in the Coulomb friction, and a topography independent contribution similar to the classical Voellmy drag, we construct a general curvature dependent frictional resistance, and thus propose new extended model equations. With three site-specific examples, we compare the apparent frictional resistance of the new approach, which includes topographic curvature effects, to the classical one. Our simulation results demonstrate substantial effects of the curvature on the flow dynamics e.g., the dynamic pressure distribution along the slope. The comparison of resistance coefficients between the two models demonstrates that the physically based extension presents an improvement to the classical approach. Furthermore a practical example highlights its influence on the pressure outline in the run out zone of the avalanche. Snow avalanche dynamics modeling natural terrain curvature centrifugal force friction coefficients. KW - Snow KW - Avalanche Y1 - 2012 U6 - https://doi.org/10.1016/j.coldregions.2012.01.005 SN - 1872-7441 VL - 74-75 SP - 21 EP - 30 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Bühler, Yves A1 - Christen, Marc A1 - Kowalski, Julia A1 - Bartelt, Perry T1 - Sensitivity of snow avalanche simulations to digital elevation model quality and resolution JF - Annals of Glaciology N2 - Digital elevation models (DEMs), represent the three-dimensional terrain and are the basic input for numerical snow avalanche dynamics simulations. DEMs can be acquired using topographic maps or remote-sensing technologies, such as photogrammetry or lidar. Depending on the acquisition technique, different spatial resolutions and qualities are achieved. However, there is a lack of studies that investigate the sensitivity of snow avalanche simulation algorithms to the quality and resolution of DEMs. Here, we perform calculations using the numerical avalance dynamics model RAMMS, varying the quality and spatial resolution of the underlying DEMs, while holding the simulation parameters constant. We study both channelized and open-terrain avalanche tracks with variable roughness. To quantify the variance of these simulations, we use well-documented large-scale avalanche events from Davos, Switzerland (winter 2007/08), and from our large-scale avalanche test site, Valĺee de la Sionne (winter 2005/06). We find that the DEM resolution and quality is critical for modeled flow paths, run-out distances, deposits, velocities and impact pressures. Although a spatial resolution of ~25 m is sufficient for large-scale avalanche modeling, the DEM datasets must be checked carefully for anomalies and artifacts before using them for dynamics calculations. KW - snow KW - avalanche Y1 - 2011 SN - 1727-5644 VL - 52 IS - 58 SP - 72 EP - 80 PB - Cambridge University Press CY - Cambridge ER - TY - JOUR A1 - Christen, Marc A1 - Bartelt, Perry A1 - Kowalski, Julia T1 - Back calculation of the In den Arelen avalanche with RAMMS: Interpretation of model results JF - Annals of Glaciology N2 - Two- and three-dimensional avalanche dynamics models are being increasingly used in hazard-mitigation studies. These models can provide improved and more accurate results for hazard mapping than the simple one-dimensional models presently used in practice. However, two- and three-dimensional models generate an extensive amount of output data, making the interpretation of simulation results more difficult. To perform a simulation in three-dimensional terrain, numerical models require a digital elevation model, specification of avalanche release areas (spatial extent and volume), selection of solution methods, finding an adequate calculation resolution and, finally, the choice of friction parameters. In this paper, the importance and difficulty of correctly setting up and analysing the results of a numerical avalanche dynamics simulation is discussed. We apply the two-dimensional simulation program RAMMS to the 1968 extreme avalanche event In den Arelen. We show the effect of model input variations on simulation results and the dangers and complexities in their interpretation. KW - avalanche Y1 - 2010 SN - 1727-5644 U6 - https://doi.org/10.3189/172756410791386553 VL - 51 IS - 54 SP - 161 EP - 168 PB - Cambridge University Press CY - Cambridge ER - TY - JOUR A1 - Christen, Marc A1 - Kowalski, Julia A1 - Bartelt, Perry T1 - RAMMS: Numerical simulation of dense snow avalanches in three-dimensional terrain JF - Cold Regions Science and Technology N2 - Numerical avalanche dynamics models have become an essential part of snow engineering. Coupled with field observations and historical records, they are especially helpful in understanding avalanche flow in complex terrain. However, their application poses several new challenges to avalanche engineers. A detailed understanding of the avalanche phenomena is required to construct hazard scenarios which involve the careful specification of initial conditions (release zone location and dimensions) and definition of appropriate friction parameters. The interpretation of simulation results requires an understanding of the numerical solution schemes and easy to use visualization tools. We discuss these problems by presenting the computer model RAMMS, which was specially designed by the SLF as a practical tool for avalanche engineers. RAMMS solves the depth-averaged equations governing avalanche flow with accurate second-order numerical solution schemes. The model allows the specification of multiple release zones in three-dimensional terrain. Snow cover entrainment is considered. Furthermore, two different flow rheologies can be applied: the standard Voellmy–Salm (VS) approach or a random kinetic energy (RKE) model, which accounts for the random motion and inelastic interaction between snow granules. We present the governing differential equations, highlight some of the input and output features of RAMMS and then apply the models with entrainment to simulate two well-documented avalanche events recorded at the Vallée de la Sionne test site. KW - RAMMS KW - snow KW - avalanche Y1 - 2010 U6 - https://doi.org/10.1016/j.coldregions.2010.04.005 SN - 1872-7441 VL - 63 IS - 1-2 SP - 1 EP - 14 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Fischer, Jan-Thomas A1 - Kowalski, Julia A1 - Pudasaini, Shiva P. A1 - Miller, S. A. T1 - Dynamic Avalanche Modeling in Natural Terrain JF - International Snow Science Workshop, Davos 2009, Proceedings ; Proc. ISSW 2009 N2 - The powerful avalanche simulation toolbox RAMMS (Rapid Mass Movements) is based on a depth-averaged hydrodynamic system of equations with a Voellmy-Salm friction relation. The two empirical friction parameters μ and � correspond to a dry Coulomb friction and a viscous resistance, respectively. Although μ and � lack a proper physical explanation, 60 years of acquired avalanche data in the Swiss Alps made a systematic calibration possible. RAMMS can therefore successfully model avalanche flow depth, velocities, impact pressure and run out distances. Pudasaini and Hutter (2003) have proposed extended, rigorously derived model equations that account for local curvature and twist. A coordinate transformation into a reference system, applied to the actual mountain topography of the natural avalanche path, is performed. The local curvature and the twist of the avalanche path induce an additional term in the overburden pressure. This leads to a modification of the Coulomb friction, the free-surface pressure gradient, the pressure induced by the channel, and the gravity components along and normal to the curved and twisted reference surface. This eventually guides the flow dynamics and deposits of avalanches. In the present study, we investigate the influence of curvature on avalanche flow in real mountain terrain. Simulations of real avalanche paths are performed and compared for the different models approaches. An algorithm to calculate curvature in real terrain is introduced in RAMMS. This leads to a curvature dependent friction relation in an extended version of the Voellmy-Salm model equations. Our analysis provides yet another step in interpreting the physical meaning and significance of the friction parameters used in the RAMMS computational environment. KW - snow KW - avalanche Y1 - 2009 SP - 448 EP - 452 ER - TY - JOUR A1 - McArdell, Brian W. A1 - Bartelt, Perry A1 - Kowalski, Julia T1 - Field observations of basal forces and fluid pore pressure in a debris flow JF - Geophysical Research Letters (GRL) N2 - Using results from an 8 m2 instrumented force plate we describe field measurements of normal and shear stresses, and fluid pore pressure for a debris flow. The flow depth increased from 0.1 to 1 m within the first 12 s of flow front arrival, remained relatively constant until 100 s, and then gradually decreased to 0.5 m by 600 s. Normal and shear stresses and pore fluid pressure varied in-phase with the flow depth. Calculated bulk densities are ρb = 2000–2250 kg m−3 for the bulk flow and ρf = 1600–1750 kg m−3 for the fluid phase. The ratio of effective normal stress to shear stress yields a Coulomb basal friction angle of ϕ = 26° at the flow front. We did not find a strong correlation between the degree of agitation in the flow, estimated using the signal from a geophone on the force plate, and an assumed dynamic pore fluid pressure. Our data support the idea that excess pore-fluid pressures are long lived in debris flows and therefore contribute to their unusual mobility. KW - debris flow Y1 - 2007 SN - 0094-8276 VL - 34 IS - 7 ER - TY - JOUR A1 - Heierli, Joachim A1 - Purves, Ross S. A1 - Felber, Andreas A1 - Kowalski, Julia T1 - Verification of nearest-neighbours interpretations in avalanche forecasting JF - Annals of Glaciology N2 - This paper examines the positive and negative aspects of a range of interpretations of nearest-neighbours models. Measures-oriented and distributionoriented verification methods are applied to categorial, probabilistic and descriptive interpretations of nearest neighbours used operationally in avalanche forecasting in Scotland and Switzerland. The dependence of skill and accuracy measures on base rate is illustrated. The purpose of the forecast and the definition of events are important variables in determining the quality of the forecast. A discussion of the application of different interpretations in operational avalanche forecasting is presented. KW - avalanche Y1 - 2004 SN - 1727-5644 VL - 38 IS - 1 SP - 84 EP - 88 ER - TY - JOUR A1 - Mertens, Josef A1 - Klevenhusen, K. D. A1 - Jakob, H. T1 - Accurate Transonic Wave Drag Prediction Using Simple Physical Models JF - AIAA-Journal. 25 (1987), H. 6 Y1 - 1987 SN - 0001-1452 SP - 799 EP - 805 ER - TY - JOUR A1 - Mertens, Josef A1 - Henke, Rolf T1 - Adaptive technologies for future civil air transport JF - Air & Space Europe. 3 (2001), H. 3-4 Y1 - 2001 SN - 1247-5793 SP - 80 EP - 82 ER - TY - JOUR A1 - Mertens, Josef T1 - Required technologies for supersonic aircraft JF - Fluid dynamics research on supersonic aircraft : this report is a compilation of the edited proceedings of the special course on "Fluid dynamic research on supersonic aircraft" held at the Karman Institute for Fluid Dynamics (VKI) in Rhode-Saint-Genese, Belgium, 25-29 May 1998 Y1 - 1998 SN - 92-837-1007-X N1 - (RTO educational notes ; 4) SP - 5.1 EP - 5.16 PB - Research and Technology Organization CY - Neuilly-sur-Seine ER - TY - JOUR A1 - Mertens, Josef T1 - Multi point design challenges for supersonic transports JF - Fluid dynamics research on supersonic aircraft : this report is a compilation of the edited proceedings of the special course on "Fluid dynamics research on supersonic aircraft" held at the Karman Institute for Fluid Dynamics (VKI) in Rhode-Saint-Genese, Belgium, 25-29 May 1998 Y1 - 1998 SN - 92-837-1007-X SP - 8.1 EP - 8.12 PB - Research and Technology Organization CY - Neuilly-sur-Seine ER - TY - JOUR A1 - Overduin, James A1 - Blome, Hans-Joachim A1 - Hoell, Josef T1 - Wolfgang Priester: from the big bounce to the Lambda-dominated universe JF - Naturwissenschaften Y1 - 2007 SN - 0028-1042 VL - 94 IS - 6 SP - 417 EP - 429 ER - TY - JOUR A1 - Trilla, Joan A1 - Grossen, Jürgen A1 - Robinson, Alexander A1 - Funke, Harald A1 - Bosschaerts, Walter A1 - Hendrick, Patrick T1 - Development of a hydrogen combustion chamber for an ultra micro gas turbine JF - PowerMEMS 2008, 8th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications, microEMS 2008, 2nd Symposium on Micro Environmental Machine Systems, Sendai, JP, Nov 9-12, 2008 Y1 - 2008 SP - 101 EP - 104 ER - TY - JOUR A1 - Robinson, A. E. A1 - Funke, Harald A1 - Hendrick, P. A1 - Recker, E. A1 - Peirs, J. T1 - Development of a hydrogen fuelled 1 kW ultra micro gas turbine with special respect to designing, testing and mapping of the µ-scale combustor JF - IEEE International Conference on Sustainable Energy Technologies, 2008 : ICSET 2008 ; Singapore, 24 - 27 Nov. 2008. Y1 - 2008 SN - 978-1-4244-1887-9 SP - 656 EP - 660 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Blome, Hans-Joachim A1 - Chicone, Carmen A1 - Hehl, Friedrich W. A1 - Mashhoon, Bahram T1 - Nonlocal modification of Newtonian gravity JF - Physical Review D Y1 - 2010 SN - 0556-2821 N1 - 11 pages VL - 81 IS - 6 SP - 065020 ER - TY - JOUR A1 - Wilson, T. L. A1 - Blome, Hans-Joachim T1 - The Pioneer anomaly and a rotating Gödel universe JF - Advances in Space Research Y1 - 2009 SN - 0273-1177 VL - 44 IS - 11 SP - 1345 EP - 1353 ER - TY - JOUR A1 - Havermann, Marc A1 - Salve, M. de A1 - Tin, G. del A1 - Panella, B. T1 - Experimental Study of the Temperature Field along a Density Lock / Salve, M. de ; Tin, G. del ; Panella, B. ; Sansoldo, D. ; Havermann, M. JF - Proceedings : International Conference on New Trends in Nuclear System Thermohydraulics, May 30th - June 2nd, 1994, Pisa / organized by Dipartimento di Costruzioni Meccaniche e Nucleari ... . Ed. by Francesco Oriolo Y1 - 1994 N1 - International Conference on New Trends in Nuclear System Thermohydraulics ; (1994.05.30-06.02 ; Pisa) SP - 623 EP - 630 PB - - CY - Pisa ER - TY - JOUR A1 - Havermann, Marc A1 - Beylich, A. E. T1 - Combined Measurement of Velocity, Temperature and Pressure in Compressible Gas Flows Using Laser-Induced Iodine Fluorescence / Havermann, M. ; Beylich, A. E. Y1 - 1998 N1 - 9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon (Portugal), 1998 PB - - ER -