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AERODYNAMICS OF RE-ENTRY CAPSULES
A.S. LYASKIN, V. G. SHAKHOV
Tsien’s chart
Knudsen number
Ll
Kn
0Kn continuum flow
Kn free-molecular (rarefied) flow
LVRe
aV
M
Reynolds number
Mach number
Kn0 •slip flow•transition phase
Free-molecular (rarefied) flow
Mirror reflection Diffuse reflection
Glass Enamel
Continuum flow
1M
1M
51 M
5M
– subsonic flow
– transonic flow
– supersonic flow
– hypersonic flow
Methods for calculation of aerodynamic parameters
• sub-, trans-, super- and hypersonic flows• arbitrary shapes, close to body of revolution• arbitrary angles of attack• local flow parameters
Large particle methodFinite volume method
Euler equationsNavier-Stokes equations
Sphere (Photino), M=3, Re6·105, T0body=293K
Surface temperature
Flow temperature
Without heat transfer
With heat transfer
YES2 AIR
3D CAD model
3D FV mesh (Star-CD, SSAU) 2D FV mesh (Fluent, Marco)
Experimental methods
Wind-tunnels:•low-speed •subsonic •transonic•supersonic•hypersonic
Special facilities:•...
SSAU AUTOMATIC SYSTEM FOR AERODYNAMIC EXPERIMENTS
•Low-speed wind-tunnel T-3•6-component strain balance- angles change•digital video camera•Intranet and Internet
Experimental methods
Experimental methods
www.aero.ssau.ru/labwork/index.html