Accession Number : ADA019530

Title :   Wall Temperature Effects on Laminar Wakes.

Descriptive Note : Final technical rept. 1 Nov 73-30 Jun 75,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE AEROPHYSICS LAB

Personal Author(s) : Ahmadi,Ali Reza ; Finston,M.

Report Date : JUL 1975

Pagination or Media Count : 68

Abstract : An experimental investigation was made of the effects of cold wall conditions on the structure of the laminar near wake of a 7 degree half-angle right circular cone with a sharp nose at zero pitch and yaw. Free stream Mach number and Reynolds number were M=6.3 and Re=112,500 per inch. The cone was supported by a five-degree-of-freedom magnetic model suspension system. Measurements of pitot pressure and the recovery temperature of a cylindrical hot film were made in the region extending from the model base to five base diameters downstream. A time-dependent method was used in which the data were taken while an initially cold model slowly warmed up to adiabatic condition.

Descriptors :   *Wake, *Conical bodies, *Hypersonic characteristics, Low temperature, Near field, Time dependence, Model tests, Hypersonic wind tunnels, Reentry vehicles, Surface temperature, Wind tunnel tests, Test methods

Subject Categories : Fluid Mechanics
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE