TY  - CHAP
A1  - Macdonald, Malcolm
A1  - McGrath, C.
A1  - Appourchaux, T.
A1  - Dachwald, Bernd
A1  - Finsterle, W.
A1  - Gizon, L.
A1  - Liewer, P. C.
A1  - McInnes, Colin R.
A1  - Mengali, G.
A1  - Seboldt, W.
A1  - Sekii, T.
A1  - Solanki, S. K.
A1  - Velli, M.
A1  - Wimmer-Schweingruber, R. F.
A1  - Spietz, Peter
A1  - Reinhard, Ruedeger
ED  - Macdonald, Malcolm
T1  - Gossamer roadmap technology reference study for a solar polar mission
T2  - Advances in solar sailing
N2  - A technology reference study for a solar polar mission is presented. The study uses novel analytical methods to quantify the mission design space including the required sail performance to achieve a given solar polar observation angle within a given timeframe and thus to derive mass allocations for the remaining spacecraft sub-systems, that is excluding the solar sail sub-system. A parametric, bottom-up, system mass budget analysis is then used to establish the required sail technology to deliver a range of science payloads, and to establish where such payloads can be delivered to within a given timeframe. It is found that a solar polar mission requires a solar sail of side-length 100–125 m to deliver a ‘sufficient value’ minimum science payload, and that a 2.5 μm sail film substrate is typically required, however the design is much less sensitive to the boom specific mass.
Y1  - 2014
SN  - 978-3-642-34906-5
U6  - http://dx.doi.org/10.1007/978-3-642-34907-2_17
SP  - 243
EP  - 257
PB  - Springer
CY  - Berlin, Heidelberg
ER  - 
TY  - JOUR
A1  - Funke, Harald
A1  - Dickhoff, J.
A1  - Keinz, Jan
A1  - Anis, H. A.
A1  - Parente, A.
A1  - Hendrick, P.
T1  - Experimental and numerical study of the micromix combustion principle applied for hydrogen and hydrogen-rich syngas as fuel with increased energy density for industrial gas turbine applications
JF  - Energy procedia
N2  - The Dry Low NOx (DLN) Micromix combustion principle with increased energy density is adapted for the industrial gas turbine APU GTCP 36-300 using hydrogen and hydrogen-rich syngas with a composition of 90%-Vol. hydrogen (H₂) and 10%-Vol. carbon-monoxide (CO). Experimental and numerical studies of several combustor geometries for hydrogen and syngas show the successful advance of the DLN Micromix combustion from pure hydrogen to hydrogen-rich syngas. The impact of the different fuel properties on the combustion principle and aerodynamic flame stabilization design laws, flow field, flame structure and emission characteristics is investigated by numerical analysis using a hybrid Eddy Break Up combustion model and validated against experimental results.
Y1  - 2014
U6  - http://dx.doi.org/10.1016/j.egypro.2014.12.201
SN  - 1876-6102 (E-Journal)
IS  - 61
SP  - 1736
EP  - 1739
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Schirra, Julian
A1  - Watmuff, Jonathan
A1  - Bauschat, J.-Michael
T1  - Highly non-planar lifting systems: a relative assessment of existing potential-methodologies to accurately estimate the induced drag
JF  - 32nd  AIAA Applied Aerodynamics Conference 2014 : June, 16-20 2014, Atlanta, Ga.
Y1  - 2014
SN  - 978-1-62410-288-2
U6  - http://dx.doi.org/10.2514/6.2014-2988
SP  - Publ. online
ER  - 
TY  - CHAP
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Börner, Sebastian
A1  - Haj Ayed, A.
A1  - Kusterer, K.
A1  - Tekin, N.
A1  - Kazari, M.
A1  - Kitajima, J.
A1  - Horikawa, A.
A1  - Okada, K.
ED  - Song, Seung Jin
T1  - Experimental and numerical characterization of the dry low NOx micromix hydrogen combustion principle at increased energy density for industrial hydrogen gas turbine applications
T2  - Combustion, fuels and emissions : proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2013 ; June 3 - 7, 2013, San Antonio, Texas, USA ; vol. 1
Y1  - 2013
SN  - 978-0-7918-5510-2
N1  - Paper No: GT2013-94771
SP  - V001T04A055
PB  - ASME
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Schirra, Julian
A1  - J., Watmuff
T1  - Euler-based induced drag estimation for highly non-planar lifting systems during conceptional design
T2  - 62. Deutscher Luft- und Raumfahrtkongress 2013 : 10. - 12. September 2032, Stuttgart, Haus der Wirtschaft
Y1  - 2013
SP  - 1
EP  - 8
PB  - Dt. Gesellschaft für Luft- und Raumfahrt
CY  - Bonn
ER  - 
TY  - CHAP
A1  - Niedermeier, H.
A1  - Clemens, J.
A1  - Kowalski, Julia
A1  - Macht, S.
A1  - Heinen, D.
A1  - Hoffmann, R.
A1  - Linder, Peter
T1  - Navigation system for a research ice probe for antarctic glaciers
T2  - IEEE/ION Position, Location and Navigation Symposium (PLANS) ; 5-8 May 2014, Monterey, Calif.
Y1  - 2014
SN  - 978-1-4799-3319-8
SP  - 959
EP  - 975
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - JOUR
A1  - Stadler, Alexander Maximilian
A1  - Garvey, Christopher J.
A1  - Embs, Jan Peter
A1  - Koza, Michael Marek
A1  - Unruh, Tobias
A1  - Artmann, Gerhard
A1  - Zaccai, Guiseppe
T1  - Picosecond dynamics in haemoglobin from different species: A quasielastic neutron scattering study
JF  - Biochimica et biophysica acta (BBA): General Subjects
Y1  - 2014
U6  - http://dx.doi.org/10.1016/j.bbagen.2014.06.007
SN  - 1872-8006 (E-Journal); 0304-4165 (Print)
VL  - 1840
IS  - 10
SP  - 2989
EP  - 2999
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Konstantinidis, K.
A1  - Dachwald, Bernd
A1  - Ohndorf, A.
A1  - Dykta, P.
A1  - Voigt, K.
A1  - Förstner, R.
T1  - Enceladus explorer (ENEX): A lander mission to probe subglacial water pockets on Saturn's moon enceladus for life
T2  - 64th International Astronautical Congress 2013 (IAC 2013) : Beijing, China, 23 - 27 September 2013. (Proceedings of the International Astronautical Congress, IAC ; 2)
Y1  - 2013
SN  - 978-1-62993-909-4
SP  - 1340
EP  - 1350
PB  - Curran
CY  - Red Hook, NY
ER  - 
TY  - CHAP
A1  - Dachwald, Bernd
A1  - Feldmann, Marco
A1  - Espe, Clemens
A1  - Plescher, Engelbert
A1  - Konstantinidis, K.
A1  - Forstner, R.
T1  - Enceladus explorer - A maneuverable subsurface probe for autonomous navigation through deep ice
T2  - 63rd International Astronautical Congress 2012, IAC 2012; Naples; Italy; 1 October 2012 through 5 October 2012. (Proceedings of the International Astronautical Congress, IAC ; 3)
Y1  - 2012
SN  - 978-1-62276-979-7
SP  - 1756
EP  - 1766
PB  - Curran
CY  - Red Hook, NY
ER  - 
TY  - CHAP
A1  - Schirra, Julian
A1  - Watmuff, Jon
A1  - Bauschat, J.-Michael
T1  - A relative assessment of existing potential-methodologies to accurately estimate the induced drag of highly non-planar lifting systems
T2  - Advanced aero concepts, design and operations : Applied Aerodynamics Conference  : July 22 -24, 2014, Bristol, UK
Y1  - 2014
SP  - 1
EP  - 13
ER  - 
TY  - JOUR
A1  - Konstantinidis, Konstantinos
A1  - Flores Martinez, Claudio
A1  - Dachwald, Bernd
A1  - Ohndorf, Andreas
A1  - Dykta, Paul
A1  - Bowitz, Pascal
A1  - Rudolph, Martin
A1  - Digel, Ilya
A1  - Kowalski, Julia
A1  - Voigt, Konstantin
A1  - Förstner, Roger
T1  - A lander mission to probe subglacial water on Saturn's moon enceladus for life
JF  - Acta astronautica
Y1  - 2015
SN  - 1879-2030 (E-Journal); 0094-5765 (Print)
VL  - Vol. 106
SP  - 63
EP  - 89
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Mertens, Josef
ED  - Nitsche, Wolfgang
T1  - Some important results of the technology programme RaWid
T2  - New Results in Numerical and Experimental Fluid Mechanics : Contributions to the 11th AG STAB/DGLR Symposium Berlin, Germany 1998. - Vol. 2. - (Notes on Numerical Fluid Mechanics ; 72)
Y1  - 1999
SN  - 978-3-663-10903-7 (Print)
SN  - 978-3-663-10901-3 (Elektronisch)
U6  - http://dx.doi.org/10.1007/978-3-663-10901-3_41
SP  - 315
EP  - 322
PB  - Springer Fachmedien
CY  - Wiesbaden
ER  - 
TY  - CHAP
A1  - Funke, Harald
A1  - Haj Ayed, A.
A1  - Kusterer, K.
A1  - Keinz, Jan
A1  - Kazari, M.
A1  - Kitajima, J.
A1  - Horikawa, A.
A1  - Okada, K.
T1  - Numerical Study on Increased Energy Density for the DLN Micromix Hydrogen Combustion Principle
T2  - Combustion, Fuels and Emissions (ASME Turbo Expo 2014: Turbine Technical Conference and Exposition : Düsseldorf, Germany, June 16–20, 2014 ; Vol. 4A)
Y1  - 2014
SN  - 978-0-7918-4568-4
N1  - Paper No. GT2014-25848
SP  - V04AT04A057
PB  - ASME
CY  - New York, N.Y.
ER  - 
TY  - JOUR
A1  - Dachwald, Bernd
A1  - Mikucki, Jill
A1  - Tulaczyk, Slawek
A1  - Digel, Ilya
A1  - Espe, Clemens
A1  - Feldmann, Marco
A1  - Francke, Gero
A1  - Kowalski, Julia
A1  - Xu, Changsheng
T1  - IceMole : A maneuverable probe for clean in situ analysis and sampling of subsurface ice and subglacial aquatic ecosystems
JF  - Annals of Glaciology
N2  - There is significant interest in sampling subglacial environments for geobiological studies, but they are difficult to access. Existing ice-drilling technologies make it cumbersome to maintain microbiologically clean access for sample acquisition and environmental stewardship of potentially fragile subglacial aquatic ecosystems. The IceMole is a maneuverable subsurface ice probe for clean in situ analysis and sampling of glacial ice and subglacial materials. The design is based on the novel concept of combining melting and mechanical propulsion. It can change melting direction by differential heating of the melting head and optional side-wall heaters. The first two prototypes were successfully tested between 2010 and 2012 on glaciers in Switzerland and Iceland. They demonstrated downward, horizontal and upward melting, as well as curve driving and dirt layer penetration. A more advanced probe is currently under development as part of the Enceladus Explorer (EnEx) project. It offers systems for obstacle avoidance, target detection, and navigation in ice. For the EnEx-IceMole, we will pay particular attention to clean protocols for the sampling of subglacial materials for biogeochemical analysis. We plan to use this probe for clean access into a unique subglacial aquatic environment at Blood Falls, Antarctica, with return of a subglacial brine sample.
KW  - Antarctic Glaciology
KW  - Extraterrestrial Glaciology
KW  - Glaciological instruments and methods
KW  - Subclacial exploration
KW  - Subglacial lakes
Y1  - 2014
U6  - http://dx.doi.org/10.3189/2014AoG65A004
SN  - 1727-5644
VL  - 55
IS  - 65
SP  - 14
EP  - 22
PB  - Cambridge University Press
CY  - Cambridge
ER  - 
TY  - BOOK
A1  - Benkö, Marietta
A1  - Plescher, Engelbert
T1  - Space law: reconsidering the definition/delimitation question and the passage of spacecraft through foreign airspace. (Essential air and space law ; 12)
Y1  - 2013
SN  - 9789462360761 ; 9462360766  ; 9789460948176
PB  - Eleven International Publishing
CY  - The Hague
ER  - 
TY  - CHAP
A1  - Plescher, Engelbert
A1  - Mathiak, Gerhard
A1  - Willnecker, Rainer
T1  - Technical aspects of liquid diffusion model experiments
T2  - 55th International Astronautical Congress : October 4 - 8, 2004, Vancouver, Canada / International Astronautical Federation. Bd. 8. IAC-04-J.5.04
Y1  - 2005
SP  - 5019
EP  - 5025
PB  - International Astronautical Federation
CY  - Paris
ER  - 
TY  - JOUR
A1  - Mathiak, Gerhard
A1  - Plescher, Engelbert
A1  - Willnecker, Rainer
T1  - Liquid metal diffusion experiments in microgravity - Vibrational effects
JF  - Measurement science and technology
Y1  - 2005
U6  - http://dx.doi.org/10.1088/0957-0233/16/2/003
SN  - 0957-0233
VL  - Vol. 16
IS  - No. 2
SP  - 336
ER  - 
TY  - JOUR
A1  - Mathiak, Gerhard
A1  - Willnecker, Rainer
A1  - Plescher, Engelbert
T1  - Vibrational effects on diffusion experiments
JF  - Microgravity science and technology : international journal for microgravity research and applications
Y1  - 2005
SN  - 0938-0108
VL  - Vol. 15
IS  - No. 1
SP  - 295
EP  - 300
ER  - 
TY  - THES
A1  - Börner, Sebastian
T1  - Optimization and testing of a low NOx hydrogen fuelled gas turbine
Y1  - 2013
N1  - Zugl.: Bruxelles, Université libre, Diss., 2013
PB  - Université Libre de Bruxelles
CY  - Bruxelles
ER  - 
TY  - JOUR
A1  - Seifarth, Volker
A1  - Goßmann, Matthias
A1  - Grosse, J. O.
A1  - Becker, C.
A1  - Heschel, I.
A1  - Artmann, Gerhard
A1  - Temiz Artmann, Aysegül
T1  - Development of a Bioreactor to Culture Tissue Engineered Ureters Based on the Application of Tubular OPTIMAIX 3D Scaffolds
JF  - Urologia Internationalis
Y1  - 2015
U6  - http://dx.doi.org/10.1159/000368419
SN  - 0042-1138
VL  - 2015
IS  - 95
SP  - 106
EP  - 113
PB  - Karger
CY  - Basel
ER  - 
TY  - CHAP
A1  - Bagheri, Mohsen
A1  - Schleupen, Josef
A1  - Dahmann, Peter
A1  - Kallweit, Stephan
T1  - A multi-functional device applying for the safe maintenance at high-altitude on wind turbines
T2  - 20th International Conference on Composite Materials : Copenhagen, 19 - 24th July 2015
Y1  - 2015
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Busse, Daniel
A1  - Esch, Thomas
A1  - Muntaniol, Roman
T1  - Thermal management in E-carsharing vehicles - preconditioning concepts of passenger compartments
T2  - E-Mobility in Europe : trends and good practice
N2  - The issue of thermal management in electric vehicles includes the topics of drivetrain cooling and heating, interior temperature, vehicle body conditioning and safety. In addition to the need to ensure optimal thermal operating conditions of the drivetrain components (drive motor, battery and electrical components), thermal comfort must be provided for the passengers. Thermal comfort is defined as the feeling which expresses the satisfaction of the passengers with the ambient conditions in the compartment. The influencing factors on thermal comfort are the temperature and humidity as well as the speed of the indoor air and the clothing and the activity of the passengers, in addition to the thermal radiation and the temperatures of the interior surfaces. The generation and the maintenance of free visibility (ice- and moisture-free windows) count just as important as on-demand heating and cooling of the entire vehicle. A Carsharing climate concept of the innovative ec2go vehicle stipulates and allows for only seating areas used by passengers to be thermally conditioned in a close-to-body manner. To enable this, a particular feature has been added to the preconditioning of the Carsharing electric vehicle during the electric charging phase at the parking station.
KW  - Carsharing
KW  - Thermal management
KW  - Thermal comfort
KW  - Electrical vehicle
KW  - Passenger compartment
Y1  - 2015
SN  - 978-3-319-13193-1
U6  - http://dx.doi.org/10.1007/978-3-319-13194-8_18
SP  - 327
EP  - 343
PB  - Springer
CY  - Cham [u.a.]
ER  - 
TY  - CHAP
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Kusterer, K.
A1  - Haj Ayed, A.
A1  - Kazari, M.
A1  - Kitajima, J.
A1  - Horikawa, A.
A1  - Okada, K.
T1  - Experimental and Numerical Study on Optimizing the DLN Micromix Hydrogen Combustion Principle for Industrial Gas Turbine Applications
T2  - ASME Turbo Expo 2015: Turbine Technical Conference and Exposition Volume 4A: Combustion, Fuels and Emissions Montreal, Quebec, Canada, June 15–19, 2015
Y1  - 2015
SN  - 978-0-7918-5668-0
U6  - http://dx.doi.org/10.1115/GT2015-42043
SP  - V04AT04A008
ER  - 
TY  - JOUR
A1  - Haj Ayed, A.
A1  - Kusterer, K.
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Striegan, Constantin
A1  - Bohn, D.
T1  - Experimental and numerical investigations of the dry-low-NOx hydrogen micromix combustion chamber of an industrial gas turbine
JF  - Propulsion and power research
Y1  - 2015
U6  - http://dx.doi.org/10.1016/j.jppr.2015.07.005
SN  - 2212-540X
VL  - Vol. 4
IS  - Iss. 3
SP  - 123
EP  - 131
ER  - 
TY  - JOUR
A1  - Haj Ayed, A.
A1  - Kusterer, K.
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Striegan, Constantin
A1  - Bohn, D.
T1  - Improvement study for the dry-low-NOx hydrogen micromix combustion technology
JF  - Propulsion and power research
Y1  - 2015
U6  - http://dx.doi.org/10.1016/j.jppr.2015.07.003
SN  - 2212-540X
VL  - Vol. 4
IS  - Iss. 3
SP  - 132
EP  - 140
ER  - 
TY  - CHAP
A1  - Neu, Eugen
A1  - Janser, Frank
A1  - Khatibi, Akbar A.
A1  - Orifici, Adrian C.
T1  - Operational modal analysis of a cantilever in a wind tunnel using optical fiber bragg grating sensors
T2  - 6th International Operational Modal Analysis Conference. IOMAC´15. 2015 May 12-14 Gijon - Spain
Y1  - 2015
U6  - http://dx.doi.org/10.13140/RG.2.1.3753.0324
ER  - 
TY  - JOUR
A1  - Bindal, Gaurav
A1  - Sharma, Sparsh
A1  - Janser, Frank
A1  - Neu, Eugen
T1  - Detailed analysis of variables affecting wing kinematics of bat flight
JF  - SAE International Journal of Aerospace
Y1  - 2013
U6  - http://dx.doi.org/10.4271/2013-01-9003
SN  - 1946-3901
VL  - 6
IS  - 2
SP  - 811
EP  - 818
ER  - 
TY  - JOUR
A1  - Kowalski, Julia
A1  - Linder, Peter
A1  - Zierke, S.
A1  - Wulfen, B. van
A1  - Clemens, J.
A1  - Konstantinidis, K.
A1  - Ameres, G.
A1  - Hoffmann, R.
A1  - Mikucki, J.
A1  - Tulaczyk, S.
A1  - Funke, O.
A1  - Blandfort, D.
A1  - Espe, Clemens
A1  - Feldmann, Marco
A1  - Francke, Gero
A1  - Hiecker, S.
A1  - Plescher, Engelbert
A1  - Schöngarth, Sarah
A1  - Dachwald, Bernd
A1  - Digel, Ilya
A1  - Artmann, Gerhard
A1  - Eliseev, D.
A1  - Heinen, D.
A1  - Scholz, F.
A1  - Wiebusch, C.
A1  - Macht, S.
A1  - Bestmann, U.
A1  - Reineking, T.
A1  - Zetzsche, C.
A1  - Schill, K.
A1  - Förstner, R.
A1  - Niedermeier, H.
A1  - Szumski, A.
A1  - Eissfeller, B.
A1  - Naumann, U.
A1  - Helbing, K.
T1  - Navigation technology for exploration of glacier ice with maneuverable melting probes
JF  - Cold Regions Science and Technology
N2  - The Saturnian moon Enceladus with its extensive water bodies underneath a thick ice sheet cover is a potential candidate for extraterrestrial life. Direct exploration of such extraterrestrial aquatic ecosystems requires advanced access and sampling technologies with a high level of autonomy. A new technological approach has been developed as part of the collaborative research project Enceladus Explorer (EnEx). The concept is based upon a minimally invasive melting probe called the IceMole. The force-regulated, heater-controlled IceMole is able to travel along a curved trajectory as well as upwards. Hence, it allows maneuvers which may be necessary for obstacle avoidance or target selection. Maneuverability, however, necessitates a sophisticated on-board navigation system capable of autonomous operations. The development of such a navigational system has been the focal part of the EnEx project. The original IceMole has been further developed to include relative positioning based on in-ice attitude determination, acoustic positioning, ultrasonic obstacle and target detection integrated through a high-level sensor fusion. This paper describes the EnEx technology and discusses implications for an actual extraterrestrial mission concept.
Y1  - 2016
U6  - http://dx.doi.org/10.1016/j.coldregions.2015.11.006
SN  - 0165-232X
IS  - 123
SP  - 53
EP  - 70
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Grundmann, Jan Thimo
A1  - Dachwald, Bernd
A1  - Grimm, Christian D.
A1  - Kahle, Ralph
A1  - Koch, Aaron Dexter
A1  - Krause, Christian
A1  - Lange, Caroline
A1  - Quantius, Dominik
A1  - Ulamec, Stephan
T1  - Spacecraft for Hypervelocity Impact Research – An Overview of Capabilities, Constraints and the Challenges of Getting There
JF  - Procedia Engineering
Y1  - 2015
U6  - http://dx.doi.org/10.1016/j.proeng.2015.04.021
SN  - 1877-7058
N1  - Proceedings of the 2015 Hypervelocity Impact Symposium (HVIS 2015)
VL  - Vol. 103
SP  - 151
EP  - 158
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Grundmann, Jan Thimo
A1  - Bauer, Waldemar
A1  - Biele, Jens
A1  - Cordero, Frederico
A1  - Dachwald, Bernd
A1  - Koncz, Alexander
A1  - Krause, Christian
A1  - Mikschl, Tobias
A1  - Montenegro, Sergio
A1  - Quantius, Dominik
A1  - Ruffer, Michael
A1  - Sasaki, Kaname
A1  - Schmitz, Nicole
A1  - Seefeldt, Patric
A1  - Tóth, Norbert
A1  - Wejmo, Elisabet
T1  - From Sail to Soil – Getting Sailcraft Out of the Harbour on a Visit to One of Earth’s Nearest Neighbours
T2  - 4th IAA Planetary Denfense Conference - PDC 2015,  13-17 April 2015, Frascati, Roma, Italy
Y1  - 2015
ER  - 
TY  - CHAP
A1  - Pirovano, Laura
A1  - Seefeldt, Patric
A1  - Dachwald, Bernd
A1  - Noomen, Ron
T1  - Attitude and Orbital Dynamics Modeling for an Uncontrolled Solar-Sail Experiment in Low-Earth Orbit
T2  - 25th International Symposium on Spaceflight Dynamics, 2015, Munich, Germany
Y1  - 2015
ER  - 
TY  - CHAP
A1  - Digel, Ilya
A1  - Sadykov, R.
A1  - Temiz Artmann, Aysegül
A1  - Artmann, Gerhard
T1  - Changes in intestinal microflora in rats induced by oral exposure to low lead (II) concentrations
T2  - Lead Exposure and Poisoning: Clinical Symptoms, Medical Management and Preventive Strategies
Y1  - 2015
SN  - 9781634826990
SP  - 75
EP  - 99
PB  - Nova Science Publ.
ER  - 
TY  - CHAP
A1  - Horikawa, Atsushi
A1  - Kazari, Masahide
A1  - Okada, Kunio
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Kusterer, Karsten
A1  - Haji Ayed, Anis
T1  - Developments of Hydrogen Dry Low Emission Combustion Technology
T2  - Annual Congress of Gas Turbine Society Japan, 2015
Y1  - 2015
N1  - Abstract in engl.; Text in japanisch
ER  - 
TY  - CHAP
A1  - Horikawa, Atsushi
A1  - Okada, Kunio
A1  - Kazari, Masahide
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Kusterer, Karsten
A1  - Haj Ayed, Anis
T1  - Application of Low NOx Micro-Mix Hydrogen Combustion to Industrial Gas Turbine Combustor and Conceptual Design
T2  - Proceedings of International Gas Turbine Congress 2015 Tokyo November 15-20, 2015, Tokyo, Japan
Y1  - 2015
SN  - 978-4-89111-008-6
N1  - IGTC15-0238
SP  - 141
EP  - 146
ER  - 
TY  - CHAP
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Haj Ayed, A.
A1  - Kazari, M.
A1  - Kitajima, J.
A1  - Horikawa, A.
A1  - Okada, K.
T1  - Development and Testing of a Low NOx Micromix Combustion Chamber for an Industrial Gas Turbine
T2  - Proceedings of International Gas Turbine Congress 2015 Tokyo November 15-20, 2015, Tokyo, Japan
Y1  - 2015
SN  - 978-4-89111-008-6
N1  - IGTC15-0092
SP  - 131
EP  - 140
ER  - 
TY  - CHAP
A1  - Roosen, Petra
A1  - Feyerl, Günter
T1  - Gender-specific perception and utilization of personal use vehicles
T2  - FISITA World Automotive Congress 2014 : Maastricht, The Netherlands, 2 - 6 June / [organised by the International Federation of Automotive Engineering Societies (FISITA) ...]. Bd. 1
Y1  - 2015
SN  - 978-1-5108-0209-4
SP  - 418
EP  - 425
PB  - Curran
CY  - Red Hook, NY
ER  - 
TY  - CHAP
A1  - Peloni, A.
A1  - Ceriotti, M.
A1  - Dachwald, Bernd
T1  - Preliminary trajectory design of a multiple NEO rendezvous mission through solar sailing
T2  - Proceedings of the International Astronautical Congress, IAC, Vol. 8, 2014
Y1  - 2015
SN  - 978-1-63439-986-9
SP  - 5352
EP  - 5366
PB  - Curran
CY  - Red Hook, NY
ER  - 
TY  - JOUR
A1  - Neu, Eugen
A1  - Janser, Frank
A1  - Khatibi, Akbar A.
A1  - Braun, Carsten
A1  - Orifici, Adrian C.
T1  - Operational Modal Analysis of a wing excited by transonic flow
JF  - Aerospace Science and Technology
N2  - Operational Modal Analysis (OMA) is a promising candidate for flutter testing and Structural Health Monitoring (SHM) of aircraft wings that are passively excited by wind loads. However, no studies have been published where OMA is tested in transonic flows, which is the dominant condition for large civil aircraft and is characterized by complex and unique aerodynamic phenomena. We use data from the HIRENASD large-scale wind tunnel experiment to automatically extract modal parameters from an ambiently excited wing operated in the transonic regime using two OMA methods: Stochastic Subspace Identification (SSI) and Frequency Domain Decomposition (FDD). The system response is evaluated based on accelerometer measurements. The excitation is investigated from surface pressure measurements. The forcing function is shown to be non-white, non-stationary and contaminated by narrow-banded transonic disturbances. All these properties violate fundamental OMA assumptions about the forcing function. Despite this, all physical modes in the investigated frequency range were successfully identified, and in addition transonic pressure waves were identified as physical modes as well. The SSI method showed superior identification capabilities for the investigated case. The investigation shows that complex transonic flows can interfere with OMA. This can make existing approaches for modal tracking unsuitable for their application to aircraft wings operated in the transonic flight regime. Approaches to separate the true physical modes from the transonic disturbances are discussed.
Y1  - 2016
U6  - http://dx.doi.org/10.1016/j.ast.2015.11.032
SN  - 1270-9638
VL  - 49
SP  - 73
EP  - 79
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Börner, S.
A1  - Hendrick, P.
A1  - Elsing, R.
T1  - Testing and analysis of the impact on engine cycle parameters and control system modifications using hydrogen or methane as fuel in an industrial gas turbine
T2  - Progress in propulsion physics ; Volume 8
Y1  - 2016
SN  - 978-5-94588-191-4
U6  - http://dx.doi.org/10.1051/eucass/201608409
SP  - 409
EP  - 426
PB  - EDP Sciences
CY  - o.O.
ER  - 
TY  - JOUR
A1  - Neu, Eugen
A1  - Janser, Frank
A1  - Khatibi, Akbar A.
A1  - Orifici, Adrian C.
T1  - Fully Automated Operational Modal Analysis using multi-stage clustering
JF  - Mechanical Systems and Signal Processing
Y1  - 2017
U6  - http://dx.doi.org/10.1016/j.ymssp.2016.07.031
SN  - 0888-3270
VL  - Vol. 84, Part A
SP  - 308
EP  - 323
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Konstantinidis, K.
A1  - Kowalski, Julia
A1  - Martinez, C. F.
A1  - Dachwald, Bernd
A1  - Ewerhart, D.
A1  - Förstner, R.
T1  - Some necessary technologies for in-situ astrobiology on enceladus
T2  - Proceedings of the International Astronautical Congress
Y1  - 2015
SN  - 978-151081893-4
N1  - 6th International Astronautical Congress 2015: Space - The Gateway for Mankind's Future, IAC 2015; Jerusalem; Israel; 12 October 2015 through 16 October 2015
SP  - 1354
EP  - 1372
ER  - 
TY  - JOUR
A1  - Funke, Harald
A1  - Keinz, Jan
A1  - Kusterer, Karsten
A1  - Ayed, Anis Haj
A1  - Kazari, Masahide
A1  - Kitajima, Junichi
A1  - Horikawa, Atsushi
A1  - Okada, Kunio
T1  - Experimental and Numerical Study on Optimizing the Dry Low NOₓ Micromix Hydrogen Combustion Principle for Industrial Gas Turbine Applications
JF  - Journal of Thermal Science and Engineering Applications
N2  - Combined with the use of renewable energy sources for its production, hydrogen represents a possible alternative gas turbine fuel for future low-emission power generation. Due to the difference in the physical properties of hydrogen compared to other fuels such as natural gas, well-established gas turbine combustion systems cannot be directly applied to dry low NOₓ (DLN) hydrogen combustion. The DLN micromix combustion of hydrogen has been under development for many years, since it has the promise to significantly reduce NOₓ emissions. This combustion principle for air-breathing engines is based on crossflow mixing of air and gaseous hydrogen. Air and hydrogen react in multiple miniaturized diffusion-type flames with an inherent safety against flashback and with low NOₓ emissions due to a very short residence time of the reactants in the flame region. The paper presents an advanced DLN micromix hydrogen application. The experimental and numerical study shows a combustor configuration with a significantly reduced number of enlarged fuel injectors with high-thermal power output at constant energy density. Larger fuel injectors reduce manufacturing costs, are more robust and less sensitive to fuel contamination and blockage in industrial environments. The experimental and numerical results confirm the successful application of high-energy injectors, while the DLN micromix characteristics of the design point, under part-load conditions, and under off-design operation are maintained. Atmospheric test rig data on NOₓ emissions, optical flame-structure, and combustor material temperatures are compared to numerical simulations and show good agreement. The impact of the applied scaling and design laws on the miniaturized micromix flamelets is particularly investigated numerically for the resulting flow field, the flame-structure, and NOₓ formation.
Y1  - 2016
U6  - http://dx.doi.org/10.1115/1.4034849
SN  - 1948-5093
N1  - TSEA-15-1227
VL  - 9
IS  - 2
SP  - 021001
EP  - 021001-10
PB  - ASME
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Ayed, Anis Haj
A1  - Kusterer, Karsten
A1  - Funke, Harald
A1  - Keinz, Jan
T1  - CFD Based Improvement of the DLN Hydrogen Micromix Combustion Technology at Increased Energy Densities
JF  - American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS)
N2  - Combined with the use of renewable energy sources for its production, Hydrogen represents a possible alternative gas turbine fuel within future low emission power generation. Due to the large difference in the physical properties of Hydrogen compared to other fuels such as natural gas, well established gas turbine combustion systems cannot be directly applied for Dry Low NOx (DLN) Hydrogen combustion. Thus, the development of DLN combustion technologies is an essential and challenging task for the future of Hydrogen fuelled gas turbines. The DLN Micromix combustion principle for hydrogen fuel has been developed to significantly reduce NOx-emissions. This combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type flames. The major advantages of this combustion principle are the inherent safety against flash-back and the low NOx-emissions due to a very short residence time of reactants in the flame region of the micro-flames. The Micromix Combustion technology has been already proven experimentally and numerically for pure Hydrogen fuel operation at different energy density levels. The aim of the present study is to analyze the influence of different geometry parameter variations on the flame structure and the NOx emission and to identify the most relevant design parameters, aiming to provide a physical understanding of the Micromix flame sensitivity to the burner design and identify further optimization potential of this innovative combustion technology while increasing its energy density and making it mature enough for real gas turbine application. The study reveals great optimization potential of the Micromix Combustion technology with respect to the DLN characteristics and gives insight into the impact of geometry modifications on flame structure and NOx emission. This allows to further increase the energy density of the Micromix burners and to integrate this technology in industrial gas turbines.
Y1  - 2016
SN  - 2313-4402
VL  - 26
IS  - 3
SP  - 290
EP  - 303
PB  - GSSRR
ER  - 
TY  - JOUR
A1  - Funke, Harald
A1  - Beckmann, Nils
A1  - Keinz, Jan
A1  - Abanteriba, Sylvester
T1  - Comparison of Numerical Combustion Models for Hydrogen and Hydrogen-Rich Syngas Applied for Dry-Low-NOx-Micromix-Combustion
JF  - ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition Volume 4A: Combustion, Fuels and Emissions Seoul, South Korea, June 13–17, 2016
N2  - The Dry-Low-NOₓ (DLN) Micromix combustion technology has been developed as low emission combustion principle for industrial gas turbines fueled with hydrogen or syngas. The combustion process is based on the phenomenon of jet-in-crossflow-mixing. Fuel is injected perpendicular into the air-cross-flow and burned in a multitude of miniaturized, diffusion-like flames. The miniaturization of the flames leads to a significant reduction of NOₓ emissions due to the very short residence time of reactants in the flame.

In the Micromix research approach, CFD analyses are validated towards experimental results. The combination of numerical and experimental methods allows an efficient design and optimization of DLN Micromix combustors concerning combustion stability and low NOₓ emissions.

The paper presents a comparison of several numerical combustion models for hydrogen and hydrogen-rich syngas. They differ in the complexity of the underlying reaction mechanism and the associated computational effort.

For pure hydrogen combustion a one-step global reaction is applied using a hybrid Eddy-Break-up model that incorporates finite rate kinetics. The model is evaluated and compared to a detailed hydrogen combustion mechanism derived by Li et al. including 9 species and 19 reversible elementary reactions. Based on this mechanism, reduction of the computational effort is achieved by applying the Flamelet Generated Manifolds (FGM) method while the accuracy of the detailed reaction scheme is maintained.

For hydrogen-rich syngas combustion (H₂-CO) numerical analyses based on a skeletal H₂/CO reaction mechanism derived by Hawkes et al. and a detailed reaction mechanism provided by Ranzi et al. are performed.

The comparison between combustion models and the validation of numerical results is based on exhaust gas compositions available from experimental investigation on DLN Micromix combustors.

The conducted evaluation confirms that the applied detailed combustion mechanisms are able to predict the general physics of the DLN-Micromix combustion process accurately. The Flamelet Generated Manifolds method proved to be generally suitable to reduce the computational effort while maintaining the accuracy of detailed chemistry.

Especially for reaction mechanisms with a high number of species accuracy and computational effort can be balanced using the FGM model.
Y1  - 2016
SN  - 978-0-7918-4975-0
U6  - http://dx.doi.org/10.1115/GT2016-56430
PB  - ASME
CY  - New York, NY
ER  - 
TY  - JOUR
A1  - Neu, Eugen
A1  - Janser, Frank
A1  - Khatibi, Akbar A.
A1  - Orifici, Adrian C.
T1  - Automated modal parameter-based anomaly detection under varying wind excitation
JF  - Structural Health Monitoring
N2  - Wind-induced operational variability is one of the major challenges for structural health monitoring of slender engineering structures like aircraft wings or wind turbine blades. Damage sensitive features often show an even bigger sensitivity to operational variability. In this study a composite cantilever was subjected to multiple mass configurations, velocities and angles of attack in a controlled wind tunnel environment. A small-scale impact damage was introduced to the specimen and the structural response measurements were repeated. The proposed damage detection methodology is based on automated operational modal analysis. A novel baseline preparation procedure is described that reduces the amount of user interaction to the provision of a single consistency threshold. The procedure starts with an indeterminate number of operational modal analysis identifications from a large number of datasets and returns a complete baseline matrix of natural frequencies and damping ratios that is suitable for subsequent anomaly detection. Mahalanobis distance-based anomaly detection is then applied to successfully detect the damage under varying severities of operational variability and with various degrees of knowledge about the present operational conditions. The damage detection capabilities of the proposed methodology were found to be excellent under varying velocities and angles of attack. Damage detection was less successful under joint mass and wind variability but could be significantly improved through the provision of the currently encountered operational conditions.
Y1  - 2016
U6  - http://dx.doi.org/10.1177/1475921716665803
SN  - 1475-9217
VL  - 15
IS  - 6
SP  - 1
EP  - 20
PB  - Sage
CY  - London
ER  - 
TY  - CHAP
A1  - Wu, Ziyi
A1  - Kemper, Hans
T1  - The optimal 48 V – battery pack for a specific load profile of a heavy duty vehicle
T2  - 8. Internationale Fachtagung Kraftwerk Batterie : 26. – 27. April 2016, Münster, Deutschland
Y1  - 2016
ER  - 
TY  - CHAP
A1  - Schirra, Julian
A1  - Bauschat, J.-Michael
A1  - Watmuff, J.H.
T1  - Accurate induced drag prediction for highly non-planar lifting systems
T2  - 19th Australasian Fluid Mechanics Conference : 8.-11. Dezember 2014, Melbourne, Australia
N2  - The impact of wake model effects is investigated for two highly
non-planar lifting systems. Dependent on the geometrical
arrangement of the configuration, the wake model shape is found
to considerably affect the estimation. Particularly at higher angles
of attack, an accurate estimation based on the common linear wake
model approaches is involved.
Y1  - 2014
ER  - 
TY  - CHAP
A1  - Neu, Eugen
A1  - Janser, Frank
A1  - Khatibi, Akbar A.
A1  - Orifici, Adrian C.
T1  - In-flight vibration-based structural health monitoring of aircraft wings
T2  - 30th Congress of the internatonal council of the aeronautical sciences : 25.-30. September 2016, Daejeon, Korea
N2  - This work presents a methodology for automated
damage-sensitive feature extraction and anomaly
detection under multivariate operational variability
for in-flight assessment of wings. The
method uses a passive excitation approach, i. e.
without the need for artificial actuation. The
modal system properties (natural frequencies and
damping ratios) are used as damage-sensitive
features. Special emphasis is placed on the use
of Fiber Bragg Grating (FBG) sensing technology
and the consideration of Operational and
Environmental Variability (OEV). Measurements
from a wind tunnel investigation with a composite
cantilever equipped with FBG and piezoelectric
sensors are used to successfully detect an impact
damage. In addition, the feasibility of damage
localisation and severity estimation is evaluated
based on the coupling found between damageand
OEV-induced feature changes.
Y1  - 2016
ER  - 
TY  - CHAP
A1  - Funke, Harald
A1  - Beckmann, Nils
A1  - Keinz, Jan
A1  - Abanteriba, Sylvester
T1  - Numerical and Experimental Evaluation of a Dual-Fuel Dry-Low-NOx Micromix Combustor for Industrial Gas Turbine Applications
T2  - Proceedings of the ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. Volume 4B: Combustion, Fuels and Emissions. Charlotte, North Carolina, USA. June 26–30, 2017
N2  - The Dry-Low-NOx (DLN) Micromix combustion technology has been developed originally as a low emission alternative for industrial gas turbine combustors fueled with hydrogen. Currently the ongoing research process targets flexible fuel operation with hydrogen and syngas fuel.

The non-premixed combustion process features jet-in-crossflow-mixing of fuel and oxidizer and combustion through multiple miniaturized flames. The miniaturization of the flames leads to a significant reduction of NOx emissions due to the very short residence time of reactants in the flame.

The paper presents the results of a numerical and experimental combustor test campaign. It is conducted as part of an integration study for a dual-fuel (H2 and H2/CO 90/10 Vol.%) Micromix combustion chamber prototype for application under full scale, pressurized gas turbine conditions in the auxiliary power unit Honeywell Garrett GTCP 36-300.

In the presented experimental studies, the integration-optimized dual-fuel Micromix combustor geometry is tested at atmospheric pressure over a range of gas turbine operating conditions with hydrogen and syngas fuel. The experimental investigations are supported by numerical combustion and flow simulations. For validation, the results of experimental exhaust gas analyses are applied.

Despite the significantly differing fuel characteristics between pure hydrogen and hydrogen-rich syngas the evaluated dual-fuel Micromix prototype shows a significant low NOx performance and high combustion efficiency. The combustor features an increased energy density that benefits manufacturing complexity and costs.
Y1  - 2017
SN  - 978-0-7918-5085-5
U6  - http://dx.doi.org/10.1115/GT2017-64795
N1  - Paper No. GT2017-64795, V04BT04A045
PB  - ASME
CY  - New York
ER  - 
TY  - CHAP
A1  - Striegan, C.
A1  - Haj Ayed, A.
A1  - Funke, Harald
A1  - Loechle, S.
A1  - Kazari, M.
A1  - Horikawa, A.
A1  - Okada, K.
A1  - Koga, K.
T1  - Numerical combustion and heat transfer simulations and validation for a hydrogen fueled "micromix" test combustor in industrial gas turbine applications
T2  - Proceedings of the ASME Turbo Expo
Y1  - 2017
SN  - 978-079185085-5
U6  - http://dx.doi.org/10.1115/GT2017-64719
N1  - ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, GT 2017; Charlotte; United States; 26 June 2017 through 30 June 2017
IS  - Volume Part F130041-4B, 2017
ER  -