TY - JOUR A1 - Gerhardt, Hans Joachim A1 - Konrath, Bernd A1 - Lieb, Rolf-Dieter T1 - Zur Druckbelüftung von Sicherheitstreppenräumen JF - vfdb-Zeitschrift. 51 (2002), H. 3 Y1 - 2002 SN - 0042-1804 N1 - Veröffentlicht auch in: Brandschutz 2003, Heft 2, Bertelsmann-Fachzeitschriften-Supplement, S. 29-37 SP - 122 EP - 128 ER - TY - JOUR A1 - Gerhardt, Hans Joachim A1 - Schmidt, G. A1 - Jung, G. T1 - Rauchversuch in einem Hochregallager JF - Bautechnik. 79 (2002), H. 6 Y1 - 2002 SN - 0932-8351 SP - 414 EP - 417 ER - TY - JOUR A1 - Gerhardt, Hans Joachim T1 - Anmerkungen zur Ähnlichkeit von Modellversuchen bei der Rauchableitung JF - vfdb-Zeitschrift. 51 (2002), H. 2 Y1 - 2002 SN - 0042-1804 SP - 47 EP - 49 ER - TY - JOUR A1 - Gerhardt, Hans Joachim A1 - Jung, G. A1 - Schmidt, G. T1 - Rauchversuch in einem Hochregallager. Die aerodynamisch wirksame Öffnungsfläche für den Rauchabzug in Hochregallagern und ihr Einfluss auf die Löscharbeiten der Feuerwehr JF - vfdb-Zeitschrift. 51 (2002), H. 1 Y1 - 2002 SN - 0042-1804 SP - 21 EP - 25 ER - TY - JOUR A1 - Gerhardt, Hans Joachim A1 - Konrath, Bernd T1 - Linienhafte Absaugung von Rauchgasen JF - vfdb-Zeitschrift. 51 (2002), H. 1 Y1 - 2002 SN - 0042-1804 SP - 33 EP - 36 ER - TY - JOUR A1 - Gerhardt, Hans Joachim T1 - Entrauchungsnachweise. Kritische Diskussion von Methoden des Brandschutzingenieurwesens JF - vfdb-Zeitschrift. 50 (2001), H. 3 Y1 - 2001 SN - 0042-1804 SP - 99 EP - 104 ER - TY - JOUR A1 - Gerhardt, Hans Joachim A1 - Rudolph, M. T1 - Steuerungsstrategien für Fensterbetätigungen von Hochhäusern. Natürliche Lüftung JF - HLH - Heizung, Lüftung, Klima, Haustechnik. 51 (2000), H. 9 Y1 - 2000 SN - 1436-5103 SP - 48 EP - 52 ER - TY - CHAP A1 - Mertens, Josef T1 - Laminar leading edges: manufacturing, contamination, and operational aspects - results from the German RaWid programme N2 - RaWid was the German national technology programme on transonic aerodynamics and supporting technologies, lasting from 1995 to 1998. One of the main topics was laminar wing development. Besides aerodynamic design work, many operational aspects were investigated. A manufacturing concept was developed to be applied to operational laminar wings and empennages. It was built in a large scale manufacturing demonstrator with the aerodynamic shape of a 1,5 m section of the A320 fin nose. Tolerances in shape and roughness fulfilled all requirements. The construction can easily be adapted to varying stiffness and strength requirements. Weight and manufacturing costs are comparable to common nose designs. The mock-up to be designed in ALTTA is based on this manufacturing principle. Another critical point is contamination of suction surfaces. Several tests were performed to investigate perforated titanium suction surfaces at realistic operational conditions: - a one year flight test with a suction plate in the stagnation area of the Airbus "Beluga" - a one year test of several suction plates in a ground test near the airport - a one year test of a working suction ground test installation at all weather conditions. No critical results were found. There is no long term suction degradation visible. Icing conditions and ground de-icing fluids used on airports did not pose severe problems. Some problems detected require only respection of weak design constraints. KW - Laminare Strömung KW - Ansaugsystem KW - Profilumströmung KW - Laminarprofil KW - RaWid KW - hybrid laminar flow KW - suction systems KW - suction structure KW - contamination KW - operational aspects Y1 - 2000 ER - TY - RPRT A1 - Bohn, Dieter A1 - Funke, Harald A1 - Gier, J. T1 - Untersuchung des Strömungsausgleichs in den Schaufelreihen ungleichförmig ungeströmter Turbomaschinen N2 - Zwischenbericht über das Vorhaben FVV - Nr. 665 (AIF-Nr. 10780) Heft R 498(1998) S. 123-136. Informationstagung Turbinen, Frühjahr 1998, Frankfurt KW - Strömungsmaschine KW - Turbine KW - Strömungsausgleich KW - Turbine Y1 - 1998 ER - TY - CHAP A1 - Dachwald, Bernd A1 - Mikucki, Jill A. A1 - Tulaczyk, Slawek A1 - Digel, Ilya A1 - Feldmann, Marco A1 - Espe, Clemens A1 - Plescher, Engelbert A1 - Xu, Changsheng T1 - IceMole - a maneuverable probe for clean in-situ analysis and sampling of subsurface ice and subglacial aquatic ecosystems : extended abstract / SCAR Open Science Conference 2012, Session 29: Advancing Clean Technologies for Exploration of Glacial Aquatic Ecosystems N2 - The ”IceMole“ is a novel maneuverable subsurface ice probe for clean in-situ analysis and sampling of subsurface ice and subglacial water/brine. It is developed and build at FH Aachen University of Applied Sciences’ Astronautical Laboratory. A first prototype was successfully tested on the Swiss Morteratsch glacier in 2010. Clean sampling is achieved with a hollow ice screw (as it is used in mountaineering) at the tip of the probe. Maneuverability is achieved with a differentially heated melting head. Funded by the German Space Agency (DLR), a consortium led by FH Aachen currently develops a much more advanced IceMole probe, which includes a sophisticated system for obstacle avoidance, target detection, and navigation in the ice. We intend to use this probe for taking clean samples of subglacial brine at the Blood Falls (McMurdo Dry Valleys, East Antarctica) for chemical and microbiological analysis. In our conference contribution, we 1) describe the IceMole design, 2) report the results of the field tests of the first prototype on the Morteratsch glacier, 3) discuss the probe’s potential for the clean in-situ analysis and sampling of subsurface ice and subglacial liquids, and 4) outline the way ahead in the development of this technology. KW - Eisschicht KW - Sonde KW - subsurface ice KW - subglacial aquatic ecosystems Y1 - 2012 ER -