Accession Number : AD0660131

Title :   BOUNDARY LAYER TRANSITION ON CONES AND SPHERES AT SUPERSONIC SPEEDS-EFFECTS OF ROUGHNESS AND COOLING,

Corporate Author : NORTH AMERICAN ROCKWELL CORP ANAHEIM OCEAN SYSTEMS OPERATIONS

Personal Author(s) : VAN Driest,E. R. ; Blumer,C. B.

Report Date : JUL 1967

Pagination or Media Count : 39

Abstract : Results of experiments on boundary layer transition as affected by single roughness elements on cones and spheres in supersonic flow are reviewed and analyzed. Results for the cone includes cooling, whereupon it is found that cooling decreases transition roughness size linearly with wall temperature. The sphere was uncooled, however the curvature of the surface had to be taken into account to collapse the data for various sized roughness elements. Relationships are presented which correlate roughness, Mach number, cooling, and body curvature effects on transition. (Author)

Descriptors :   (*BOUNDARY LAYER TRANSITION, *SUPERSONIC CHARACTERISTICS), (*CONICAL BODIES, BOUNDARY LAYER TRANSITION), (*SPHERES, BOUNDARY LAYER TRANSITION), SURFACE ROUGHNESS, COOLING, SUPERSONIC FLOW, MACH NUMBER, CORRELATION TECHNIQUES

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE