Chapter
Apr 26, 2012
Aerodynamic Disturbances on Rapidly Rotating Spacecraft in Free-Molecular Flow
Publication: Engineering, Construction, and Operations in Challenging Environments: Earth and Space 2004
Abstract
We investigate the aerodynamic forces and moments exerted upon axisymmetric bodies rotating about their symmetry axis in a free-molecular flow. The velocity field consists of a mean flow at arbitrary orientation relative to the body superimposed upon a random thermal motion described by the Maxwell-Boltzman velocity distribution. The gas-surface interaction model is based upon a combination of specular and diffuse reflections as characterized by normal and tangential momentum accommodation coefficients. For the general case, expressions for the aerodynamic disturbances are given in the form of surface integrals. Analytical and numerical results are presented for the case of a spinning sphere.
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© 2004 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Joel A. Storch
The Aerospace Corporation, Mail Stop M4/974, P.O. Box 92957, Los Angeles, CA. 90009-2957
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