TY  - CHAP
A1  - Baader, Fabian
A1  - Reiswich, M.
A1  - Bartsch, M.
A1  - Keller, D.
A1  - Tiede, E.
A1  - Keck, G.
A1  - Demircian, A.
A1  - Friedrich, M.
A1  - Dachwald, Bernd
A1  - Schüller, K.
A1  - Lehmann, R.
A1  - Chojetzki, R.
A1  - Durand, C.
A1  - Rapp, L.
A1  - Kowalski, Julia
A1  - Förstner, R.
T1  - VIPER - Student research on extraterrestrical ice penetration technology
T2  - Proceedings of the 2nd Symposium on Space Educational Activities
N2  - Recent analysis of scientific data from Cassini and earth-based observations gave evidence for a global ocean under a surrounding solid ice shell on Saturn's moon Enceladus. Images of Enceladus' South Pole showed several fissures in the ice shell with plumes constantly exhausting frozen water particles, building up the E-Ring, one of the outer rings of Saturn. In this southern region of Enceladus, the ice shell is considered to be as thin as 2 km, about an order of magnitude thinner than on the rest of the moon. Under the ice shell, there is a global ocean consisting of liquid water. Scientists are discussing different approaches the possibilities of taking samples of water, i.e. by melting through the ice using a melting probe. FH Aachen UAS developed a prototype of maneuverable melting probe which can navigate through the ice that has already been tested successfully in a terrestrial environment. This means no atmosphere and or ambient pressure, low ice temperatures of around 100 to 150K (near the South Pole) and a very low gravity of 0,114 m/s^2 or 1100 μg. Two of these influencing measures are about to be investigated at FH Aachen UAS in 2017, low ice temperature and low ambient pressure below the triple point of water. Low gravity cannot be easily simulated inside a large experiment chamber, though. Numerical simulations of the melting process at RWTH Aachen however are showing a gravity dependence of melting behavior. Considering this aspect, VIPER provides a link between large-scale experimental simulations at FH Aachen UAS and numerical simulations at RWTH Aachen. To analyze the melting process, about 90 seconds of experiment time in reduced gravity and low ambient pressure is provided by the REXUS rocket. In this time frame, the melting speed and contact force between ice and probes are measured, as well as heating power and a two-dimensional array of ice temperatures. Additionally, visual and infrared cameras are used to observe the melting process.
Y1  - 2018
SP  - 1
EP  - 6
ER  - 
TY  - JOUR
A1  - Schmitz, Günter
A1  - Vom Hemdt, A.
A1  - Breitschuh, S.
A1  - Graber, S.
T1  - Virtuelle Praktika für die Ingenieurausbildung
JF  - NetWorlds : Leben und Arbeiten in vernetzten Welten ; VDE-Kongress 2002, 21. bis 23. Oktober 2002 in Dresden / Gesamtleitung: J. Eberspächer
Y1  - 2002
SN  - 3-8007-2723-4
SP  - 69
EP  - 74
PB  - VDE-Verl.
CY  - Berlin [u.a.]
ER  - 
TY  - BOOK
A1  - Lemaitre, George
A1  - Blome, Hans-Joachim
ED  - Blome, Hans-Joachim
T1  - Von der klassischen Kosmologie zum Quantenkosmos
Y1  - 2010
SN  - 978-3-8171-3304-8
N1  - Ostwalds Klassiker der exakten Wissenschaften ; Bd. 304
PB  - Deutsch
CY  - Frankfurt am Main
ER  - 
TY  - JOUR
A1  - Schirra, Julian
A1  - Bissonnette, William
A1  - Bramesfeld, Götz
T1  - Wake-model effects on induced drag prediction of staggered boxwings
JF  - Aerospace
Y1  - 2018
U6  - http://dx.doi.org/10.3390/aerospace5010014
SN  - 2226-4310
VL  - 5
IS  - 1
ER  - 
TY  - RPRT
A1  - Esch, Thomas
A1  - Eickmann, Matthias
A1  - Coussement, Axel
A1  - Kalbhenn, Hartmut
T1  - Wasserstoffspezifische Abstimmung der Ladungswechselvorgänge eines Verbrennungsmotors mit Direkteinblasung : Schlussbericht für das Forschungsvorhaben ; Kurztitel: HydI - Hydrogen direct injection ; Förderperiode 01.07.2008 - 31.12.2011 / FH Aachen, Thermodynamik und Verbrennungstechnik
KW  - Wasserstoff
KW  - Direkteinblasung
KW  - vollvariabler Ventilbetrieb
KW  - Verbrennungsmotor
KW  - Ladungswechsel
Y1  - 2013
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Schmitz, Günter
A1  - Schmitt, H.J.
A1  - Dammann, H.
T1  - Weakly Guiding Semileaky Isolator with a Form-Birefringent Top Layer
JF  - Conference on Lasers and Electro-Optics ; (5, 1985, Baltimore, Md.) ; Conference on Lasers and Electro-Optics (CLEO '85) ; (1985.05.21-24 ; Baltimore, Md.)
Y1  - 1985
SP  - 260
PB  - Optical Society of America
CY  - Washington, DC
ER  - 
TY  - BOOK
A1  - Köhler, Bernd
T1  - Werkstofftechnologie der Luft- und Raumfahrt. Teil 1 : Grundlagen. -2. Aufl.
Y1  - 1990
SN  - 3-89653-861-6
PB  - Mainz
CY  - Aachen
ER  - 
TY  - BOOK
A1  - Köhler, Bernd
T1  - Werkstofftechnologie der Luft- und Raumfahrt. Teil 1 : Grundlagen. -4. Aufl.
Y1  - 2001
SN  - 3-89653-861-6
PB  - Mainz
CY  - Aachen
ER  - 
TY  - BOOK
A1  - Köhler, Bernd
T1  - Werkstofftechnologie der Luft- und Raumfahrt. Teil 2 : Leichtmetalle und Stähle
Y1  - 1990
SN  - 3-89653-862-4
PB  - Mainz
CY  - Aachen
ER  - 
TY  - BOOK
A1  - Köhler, Bernd
T1  - Werkstofftechnologie der Luft- und Raumfahrt. Teil 2 : Leichtmetalle und Stähle. - 2. Aufl.
Y1  - 2001
SN  - 3-89653-862-4
PB  - Mainz
CY  - Aachen
ER  - 
TY  - BOOK
A1  - Köhler, Bernd
T1  - Werkstofftechnologie der Luft- und Raumfahrt. Teil 3: HT-Superlegierungen
Y1  - 1990
SN  - 3-89653-863-2
PB  - Mainz
CY  - Aachen
ER  - 
TY  - BOOK
A1  - Köhler, Bernd
T1  - Werkstofftechnologie der Luft- und Raumfahrt. Teil 3: HT-Superlegierungen. -2. Auflage
Y1  - 2001
SN  - 3-89653-863-2
PB  - Mainz
CY  - Aachen
ER  - 
TY  - BOOK
A1  - Köhler, Bernd
T1  - Werkstofftechnologie der Luft- und Raumfahrt. Teil 4 : Sonderwerkstoffe. -2. Aufl.
Y1  - 1990
SN  - 3-89653-864-6
PB  - Mainz
CY  - Aachen
ER  - 
TY  - BOOK
A1  - Köhler, Bernd
T1  - Werkstofftechnologie der Luft- und Raumfahrt. Teil 4 : Sonderwerkstoffe. -4. Aufl.
Y1  - 2001
SN  - 3-89653-864-6
PB  - Mainz
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Blome, Hans-Joachim
T1  - Wie funktionieren die aktiven Kerne der Galaxien?
JF  - Naturwissenschaften. 76 (1989), H. 7
Y1  - 1989
SN  - 0028-1042
SP  - 310
EP  - 317
ER  - 
TY  - JOUR
A1  - Gerhardt, Hans Joachim
T1  - Wind- und Temperatureinflüsse bei der Planung von Entrauchungseinrichtungen
JF  - VFDB-Zeitschrift : Forschung, Technik und Management im Brandschutz. 55 (2006), H. 3
Y1  - 2006
SN  - 0042-1804
SP  - 115
EP  - 121
ER  - 
TY  - JOUR
A1  - Götten, Falk
A1  - Havermann, Marc
A1  - Braun, Carsten
A1  - Marino, Matthew
A1  - Bil, Cees
T1  - Wind-tunnel and CFD investigations of UAV landing gears and turrets – Improvements in empirical drag estimation
JF  - Aerospace Science and Technology
N2  - This paper analyzes the drag characteristics of several landing gear and turret configurations that are representative of unmanned aircraft tricycle landing gears and sensor turrets. A variety of these components were constructed via 3D-printing and analyzed in a wind-tunnel measurement campaign. Both turrets and landing gears were attached to a modular fuselage that supported both isolated components and multiple components at a time. Selected cases were numerically investigated with a Reynolds-averaged Navier-Stokes approach that showed good accuracy when compared to wind-tunnel data. The drag of main gear struts could be significantly reduced via streamlining their cross-sectional shape and keeping load carrying capabilities similar. The attachment of wheels introduced interference effects that increased strut drag moderately but significantly increased wheel drag compared to isolated cases. Very similar behavior was identified for front landing gears. The drag of an electro-optical and infrared sensor turret was found to be much higher than compared to available data of a clean hemisphere-cylinder combination. This turret drag was merely influenced by geometrical features like sensor surfaces and the rotational mechanism. The new data of this study is used to develop simple drag estimation recommendations for main and front landing gear struts and wheels as well as sensor turrets. These recommendations take geometrical considerations and interference effects into account.
Y1  - 2020
U6  - http://dx.doi.org/10.1016/j.ast.2020.106306
SN  - 1270-9638
VL  - 107
IS  - Art. 106306
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Hoeveler, B.
A1  - Bauknecht, André
A1  - Wolf, C. Christian
A1  - Janser, Frank
T1  - Wind-Tunnel Study of a Wing-Embedded Lifting Fan Remaining Open in Cruise Flight
JF  - Journal of Aircraft
N2  - It is investigated whether a nonrotating lifting fan remaining uncovered during cruise flight, as opposed to being covered by a shutter system, can be realized with limited additional drag and loss of lift during cruise flight. A wind-tunnel study of a wing-embedded lifting fan has been conducted at the Side Wind Test Facility Göttingen of DLR, German Aerospace Center in Göttingen using force, pressure, and stereoscopic particle image velocimetry techniques. The study showed that a step on the lower side of the wing in front of the lifting fan duct increases the lift-to-drag ratio of the whole model by up to 25% for all positive angles of attack. Different sizes and inclinations of the step had limited influence on the surface pressure distribution. The data indicate that these parameters can be optimized to maximize the lift-to-drag ratio. A doubling of the curvature radius of the lifting fan duct inlet lip on the upper side of the wing affected the lift-to-drag ratio by less than 1%. The lifting fan duct inlet curvature can therefore be optimized to maximize the vertical fan thrust of the rotating lifting fan during hovering without affecting the cruise flight performance with a nonrotating fan.
Y1  - 2020
U6  - http://dx.doi.org/10.2514/1.C035422
SN  - 1533-3868
VL  - 57
IS  - 4
PB  - AIAA
CY  - Reston, Va.
ER  - 
TY  - JOUR
A1  - Gerhardt, Hans Joachim
A1  - Janser, F.
T1  - Windbelastung belüfteter Fassadensysteme
JF  - Der Bauingenieur. 70 (1995), H. 5
Y1  - 1995
SN  - 0005-6650
SP  - 193
EP  - 201
ER  - 
TY  - BOOK
A1  - Gerhardt, Hans Joachim
T1  - Windeinwirkung auf Bedachungssysteme
Y1  - 1999
SN  - 3-8265-4799-3
N1  - Zugl.: Berlin, Techn. Univ., Diss., 1998
PB  - Shaker
CY  - Aachen
ER  -