Accession Number : ADA019149

Title :   Similitude Properties of High Speed Laminar and Turbulent Boundary Layer Incipient Separation.

Descriptive Note : Interim rept.,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCEAN ENGINEERING

Personal Author(s) : Inger,George R.

Report Date : SEP 1975

Pagination or Media Count : 48

Abstract : Following a brief review of existing experimental knowledge about the important parameters in influencing high speed boundary layer separation, a systematic analysis is made of the various similitude rules pertaining to incipient separation including viscous-inviscid interaction for both laminar and turbulent flows. For supersonic and hypersonic turbulent flows a new scaling rule is derived which, unlike existing ones, agrees with the general trend of experimental data at high Reynolds numbers. The corresponding lateral pressure gradient effects are also examined and shown to be significant for such turbulent flows throughout the entire speed range.

Descriptors :   *Boundary layer flow, *Flow separation, *High velocity, Supersonic characteristics, Hypersonic characteristics, Experimental data, Mathematical analysis, Scaling factors, Reynolds number, Pressure gradients, Models, Theory, Turbulent boundary layer

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE