aerodynamics of re-entry capsules a.s. lyaskin, v. g. shakhov

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