Accession Number : ADA288483

Title :   The Effect of Pressure Gradients on Transition Zone Length in Hypersonic Boundary Layers.

Descriptive Note : Final rept. 1 Jun 90-1 Dec 93,

Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Kimmel, Roger L.

PDF Url : ADA288483

Report Date : DEC 1993

Pagination or Media Count : 44

Abstract : Boundary layer transition was measured in zero, favorable, and adverse pressure gradients at Mach 8 using heat transfer. Models consisted of 7 degrees half angle forecones 0.4826 m long, followed by flared or ogive aft bodies 0.5334 m long. The flares and ogives produced constant pressure gradients. For the cases examined, favorable pressure gradients delay transition and adverse pressure gradients promote transition, but transition zone lengths are shorter in favorable pressure gradient. Results of the effect of adverse pressure gradient on transition zone lengths were inconclusive.

Descriptors :   *PRESSURE GRADIENTS, *BOUNDARY LAYER TRANSITION, *HYPERSONIC CHARACTERISTICS, HEAT TRANSFER, BOUNDARY LAYER, TURBULENCE, LENGTH, ADVERSE CONDITIONS, DELAY, OGIVES.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE