TY  - CHAP
A1  - Mertens, Josef
ED  - Sobieczky, H.
T1  - Supersonic laminar flow
T2  - New design concepts for high speed air transport. - (Courses and lectures / International Centre for Mechanical Sciences ; 366)
N2  - Supersonic transports are very drag sensitive. Technology to reduce drag by application of laminar flow, therefore, will be important; it is a prerequisite to achieve very long range capability. In earlier studies it was assumed that SCTs would only become possible by application of laminar flow [376]. But today, we request an SCT to be viable without application of laminar flow in order to maintain its competitiveness when laminar flow becomes available for subsonic and supersonic transports. By reducing fuel burned, laminar flow drag reduction reduces size and weight of the aircraft, or increases range capability -whereas otherwise size and weight would grow towards infinity. Transition mechanisms from laminar to turbulent state of the boundary layer flow (ALT, CFI, TSI) function as for transonic transports, but at more severe conditions: higher sweep angles, cooled surfaces; higher mode instabilities (HMI) must at least be taken into account, although they may not become important below Mach 3. Hitherto there is a worldwide lack of ground test facilities to investigate TSI at the expected cruise Mach numbers between 1.6 and 2.4; in Stuttgart, Germany one such facility -a Ludwieg tube- is still in the validation phase. A quiet Ludwieg tunnel could be a favourable choice for Europe. But it will require a new approach in designing aircraft which includes improved theoretical predictions, usage of classical wind tunnels for turbulent flow and flight tests for validation.
KW  - Wind Tunnel
KW  - Flight Test
KW  - Supersonic Wind Tunnel
KW  - Parabolized Stability Equation
Y1  - 1997
SN  - 3-2118-2815-X
U6  - http://dx.doi.org/10.1007/978-3-7091-2658-5_18
SP  - 275
EP  - 290
PB  - Springer
CY  - Wien [u.a.]
ER  - 
TY  - CHAP
A1  - Mertens, Josef
ED  - Sobieczky, H.
T1  - Son of Concorde, a technology challenge
T2  - New design concepts for high speed air transport. - (Courses and lectures / International Centre for Mechanical Sciences ; 366)
N2  - Concorde (Figure 9) is the only supersonic airliner which has been introduced into regular passenger service. It is still in service at British Airways and Air France without any flight accidents, and probably will stay in service for at least for ten more years.
KW  - Technology Challenge
KW  - Multidisciplinary Design Optimization
KW  - Specific Fuel Consumption
KW  - Engine Efficiency
KW  - Sonic Boom
Y1  - 1997
SN  - 3-2118-2815-X
U6  - http://dx.doi.org/10.1007/978-3-7091-2658-5_3
SP  - 31
EP  - 51
PB  - Springer
CY  - Wien [u.a.]
ER  - 
TY  - CHAP
A1  - Mertens, Josef
T1  - Reduction of aerodynamic drag (RaWid)-Status after the first year of the program
T2  - New results in numerical and experimental fluid mechanics. - (Notes on numerical fluid mechanics ; 60)
N2  - The technology programme “Reduction of aerodynamic drag (RaWid)” for high speed aerodynamics at Daimler-Benz Aerospace Airbus is sponsered by the German ministry for education, research and technology since July 1, 1995. Connected to this industrial programme are the cooperation programmes “MEGAFLOW” under leadership of the DLR and “Transition” by the DFG, and several contributions by DLR and universities.

The programme is oriented towards technologies required for a MEGALINER which gains momentum by the ambitious plans for a new large Airbus A3XX.

In the first year new technological steps were undertaken in theory, design and experiment. Some critical steps were verified by wing designs checked in wind tunnel tests.
KW  - Wind Tunnel
KW  - Aerodynamic Drag
KW  - Flight Test
KW  - Friction Drag
Y1  - 1997
SN  - 3-528-06960-0
U6  - http://dx.doi.org/10.1007/978-3-322-86573-1_2
SP  - 7
EP  - 14
PB  - Vieweg
CY  - Braunschweig [u.a.]
ER  - 
TY  - CHAP
A1  - Wahle, Michael
ED  - Reimerdes, Hans-G.
T1  - Strukturmechanische Auslegung von Elastomer-Bauteilen in der Schwingungstechnik
T2  - Kolloquium anläßlich des 70. Geburtstags von H. Öry : [29.09.1997 - 30.09.1997, Kármán-Auditorium, Hörsaal FO5, RWTH Aachen]
Y1  - 1997
SP  - 175
EP  - 188
PB  - Inst. für Leichtbau
CY  - Aachen
ER  - 
TY  - CHAP
A1  - Weßling, Matthias
T1  - Plädoyer für eigenverantwortliches Lernen und Arbeiten im Hochschulstudium : Bedeutung und Folgerungen für Studierende und Lehrende
T2  - Effektiver lernen - Zeit gewinnen
N2  - Inhaltsverzeichnis: 
I. Lern- und Arbeitstechniken im 1. und im 10. Semester 
II. Lern- und Arbeitstechniken als persönliches Selbstmanagement 
III. Diskussionsfragen und -thesen 
IV. Was heißt: Eigenverantwortung im Studium? 
V. Eigenverantwortung als gelebte Freiheit von Studierenden 
VI. Warum es unmöglich ist, Verantwortung an Studierende zu delegieren VII. Erziehungsauftrag: Studierende in ihrer Eigenverantwortung belassen VIII. Folgerungen für Lehrende IX. Folgerungen für Studierende
KW  - Lernstil
KW  - Selbstorganisation
KW  - Effektives Lernen
Y1  - 1997
SN  - 3-87575-012-8
SP  - 70
EP  - 82
PB  - Neinhaus
CY  - Stuttgart
ER  -