Accession Number : AD0695513

Title :   EXPERIMENTAL MEASUREMENTS IN THE NEAR WAKE OF THE APOLLO COMMAND MODULE AND A FLAT CIRCULAR DISC.

Descriptive Note : Research rept.,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Lederman,S. ; Bloom,M. H. ; Avidor,J.

Report Date : JUN 1969

Pagination or Media Count : 37

Abstract : Measurements have been performed in the wake of a model of the Apollo Command Module at zero degrees angle of attack, and a 6-inch diameter circular disc oriented normal to the flow. The experiments were performed in a hypersonic shock tunnel operated at a Mach number of about 18 at a density altitude equivalent to 250 k ft. A rake of closely spaced (1 inch apart) electrostatic probes was utilized to obtain the relative electron density distribution at several stations behind the models. These electron densities can, under certain conditions in most parts of the wake, be interpreted in terms of the neutral density distribution. The shock shapes obtained from the electron density distribution agree quite well with the data obtained by other workers. (Author)

Descriptors :   (*MANNED SPACECRAFT, ATMOSPHERE ENTRY), (*PLASMA SHEATHS, ELECTRON DENSITY), WAKE, FLOW FIELDS, SIMULATION, SHOCK TUBES, BLUNT BODIES, FLAT PLATE MODELS, HYPERSONIC FLOW

Subject Categories : Plasma Physics and Magnetohydrodynamics
      Spacecraft Trajectories and Reentry
      Manned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE