By C. Abegg, H. Bippes, F. P. Bertolotti (auth.), Wolfgang Nitsche, Hans-Joachim Heinemann, Reinhard Hilbig (eds.)
This quantity includes the papers of the eleventh Symposium of the AG STAB (German Aerospace Aerodynamics Association). during this organization these scientists and engineers from universities, research-establishments and are concerned, who're doing examine and undertaking paintings in numerical and experimental fluid mechanics and aerodynamics for aerospace and different functions. a few of the contributions are giving effects from the "Luftfahrtforschungsprogramm der Bundesregierung (German Aeronautical examine Programme). a few of the papers document on paintings backed via the Deutsche Forschungsgemeinschaft, DFG, which additionally was once offered on the symposium. the quantity provides a vast evaluation over the continuing paintings during this box in Germany.
Read Online or Download New Results in Numerical and Experimental Fluid Mechanics II: Contributions to the 11th AG STAB/DGLR Symposium Berlin, Germany 1998 PDF
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Extra resources for New Results in Numerical and Experimental Fluid Mechanics II: Contributions to the 11th AG STAB/DGLR Symposium Berlin, Germany 1998
Control of Natural Laminar Instability Waves on an Axisymmetric Body. AIAA Journal. 28. 367-369.  Liepmann. • 1981. Active control of laminar-turbulent transition, J. 201-204.  Pupator. • Sarie. • 1989. Control of random disturbances in a laminar boundary layer. AIAA Paper 89-1007. 26 slol (actuaIOf) b=125mm I=O,3mm cavity hot-wire cavity hoi-WIre I (dISturbance sensor) (control sensor) I I ~- -- O. :r '''~'m O~O o~=::~r~~r O,~6 = O,~6 EM EM :1 -0,02 actuatOl' xlc _ : . 0 6 tcontrol sensor 680 760 740 720 X[mml 700 780 Figure 6: Velocity profiles downstream of the control sensor - - Awe - -- no Awe 8 6"- I >- I I I I I \ I I 4"- t 0 I \ , I I I I t,,-__ y- '- -.
2, a stochastic signal (Gaussian distribution) with a 1% deviation around the mean Cp value has been selected. This simulates scatter effects due to experimental errors and slight time-dependent changes of the outer flow conditions. points and with 400 points, respectively, Fig. 5 and Fig. 6. The Cp distortion is so small that it is visible in the shape factor plot only. The amplification rates using different stepsizes are shown in Fig. 7 and Fig. 8 (100 respectively 400 points in the mean flow direction).
Hilbig. R.. Braunschweig 1996. 56-63.  Biringen. • 1984. Active control of transition by periodic suction-blowing. Physics of Fluids 27(6). 1345-1347.  Elliott. • 1993. Active Noise Control. IEEE Signal Processing Magazine. October 1993. 1235.  Grosche. • Yong-guang. • 1990. Experimente zur Diimpfung von Tollmien-Schlichting-Wellen durch aktive Anregung von Wandschwingungen. m 222-90 A 46 (internal report of the DLR-GOttingen. Germany).  Kleiser. • Laurien. • 1984. Three-Dimensional Numerical Simulation of Laminar-Turbulent Transition and its Control by Periodic Disturbances.