Accession Number : AD0643272

Title :   AN EXPERIMENTAL STUDY OF HYPERSONIC RAREFIED FLOW OVER A 10 DEGREE CONE,

Corporate Author : UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Hickman,Roy Scott

Report Date : SEP 1966

Pagination or Media Count : 28

Abstract : The local values of temperature, density, and impact pressure were measured for flow over a 10 degree total angle cone aligned with a Mach 9.4, 300K stagnation temperature, low density flow of nitrogen. The density and temperature were measured using electron beam techniques. The flow was produced in a conical nozzle which produced a useful inviscid core of approximately 2 inches dia. The entire flow field exhibits strong interaction or rarefied phenomena. The flow field appears to approach continuum behavior as it proceeds downstream, however, near the cone tip the presence of the hot surface affects the external density gradient or 'shock'. Because of the presence of the body, the density ratio across the apparent shock does not satisfy the Rankine-Hugoniot conditions. The local impact pressure profiles normalized to free stream impact pressure are similar in shape to the local density data. The local temperature data indicates that the gradient is highest near the wall close to the tip and decreases with distance from the model tip. The resulting temperature jump at the wall is of order of magnitude of 200K and decreasing with increasing distance from the tip. (Author)

Descriptors :   (*HYPERSONIC FLOW, *CONICAL BODIES), (*RAREFIED GAS DYNAMICS, HYPERSONIC FLOW), TEMPERATURE, DENSITY, PRESSURE

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE