Analysis of results of aerodynamic studies on the Venera 13 and 14 descent modules

Details Analysis of results of aerodynamic studies on the Venera 13 and 14 descent modules Analysis of results of aerodynamic studies on the Venera 13 and 14 descent modules

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983kosis..21..379b&link_type=abstract

Kosmicheskie Issledovaniia (ISSN 0023-4206), vol. 21, May-June 1983, p. 379-385. In Russian.

Physics

Aerodynamic Stability, Atmospheric Entry, Descent Trajectories, Planetary Landing, Spacecraft Modules, Venera Satellites, Reynolds Number, Spacecraft Stability, Stability Derivatives, Turbulent Flow, Unsteady Aerodynamics

Scientific paper

Aerodynamic investigations on the Venera 13 and 14 descent modules were performed in order to develop passive means of spacecraft stabilization, assuring the kinematic parameters which satisfy the technical specifications. The main part of the investigation of the steady aerodynamic characteristics was the determination of the aerodynamic forces and moments and their dependence on the Reynolds number. The unsteady aerodynamic characteristics of module models were studied using free and forced vibration techniques. It is shown that the mounting of a toothed stabilizing ring on the landing support leads to a flow restructuring and to a change in the dimensions of characteristic regions near the module. The turbulent-flow zone arising on the leading support expands somewhat, while the inner boundary of this region diverges from the module. The effect of turbulent flow on pressure distribution on the brake flap is thereby decreased, and this flow becomes uniform. It is concluded that the stabilizing ring partially eliminates the aerodynamic asymmetry.

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