Accession Number : AD0715901

Title :   Near-Continuum Axisymmetric Hypersonic Flow Past Very Slender Bodies.

Descriptive Note : Rept. for Oct 69-Jul 70,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Ellinwood,John W.

Report Date : 30 OCT 1970

Pagination or Media Count : 47

Abstract : The hypersonic theory for boundary layers with large transverse curvature is relaxed to allow surface slip and jump. Slip and jump coefficients for use with this continuum theory are found to be essentially unaffected by transverse curvature of the Knudsen layer. This finding follows from a study of the linearized model equation including transverse curvature terms, with diffuse reflection and total accommodation assumed at the surface. When used to estimate skin friction on an insulated 5-deg half-angle cone in helium at Mach 29, the present theory proved to be both sufficient and useful over most of the transitional flow regime. The slip velocity ratio us is two and a half times as large as Mach number over root Reynolds number, which measures other neglected near-continuum effects. (Author)

Descriptors :   (*SLENDER BODIES, HYPERSONIC CHARACTERISTICS), (*AXIALLY SYMMETRIC FLOW, BOUNDARY LAYER), SKIN FRICTION, CONICAL BODIES, REYNOLDS NUMBER

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE