Accession Number : ADA186366

Title :   Fundamental Aspects of the Structure of Supersonic Turbulent Boundary.

Descriptive Note : Annual rept. no.2, Apr 86-May 87,

Corporate Author : PRINCETON UNIV NJ DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Personal Author(s) : Watmuff, Jonathan H ; Smits, Alexander J

PDF Url : ADA186366

Report Date : May 1987

Pagination or Media Count : 41

Abstract : Measurements of structure angle in a supersonic turbulent boundary layer with zero and adverse pressure gradients are presented. Conditionally sampled measurements of u,v, and uv are presented along with quadrant analysis of the turbulent fluctuations. The latter suggests ambiguities associated with the interpretation of VITA measurements. Preliminary results of experiments on artificially generated hairpin vortices are also discussed. Measurements indicate a high degree of similarity between the signatures of these hairpin structures and ensemble averaged events in the turbulent boundary layer. Keywords: Turbulence, Boundary layer, Supersonic Flow.

Descriptors :   *SUPERSONIC FLOW, *TURBULENT BOUNDARY LAYER, *VORTICES, ADVERSE CONDITIONS, ANGLES, BOUNDARY LAYER, PRESSURE GRADIENTS, QUADRANTS, TURBULENCE, TURBULENT FLOW, VARIATIONS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE