Accession Number : AD0733974

Title :   A Numerical Study of Separating Supersonic Laminar Boundary-Layers,

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

Personal Author(s) : Senechal,G. D. ; Werle,M. J.

Report Date : 27 SEP 1971

Pagination or Media Count : 73

Abstract : A numerical study has been made of the nature of the solution to the supersonic boundary-layer equations when the flow separates from the surface. To this end, implicit finite difference solutions t the governing equations are obtained for linearly and quadratically retarded flows over flat plates for a Mach number range of 2 to 15. Both extremely hot and cold wall conditions are considered. Also, solutions for flow on a compression ramp are obtained with and without including the boundary layer's free interaction with the local freestream. The results of this study indicate that non-interacting flows are singular at separation and that free interaction effects reduces singularity. An alternate means of numerically smearing out the singularity and proceeding past separation is also presented.

Descriptors :   (*LAMINAR BOUNDARY LAYER, *FLOW SEPARATION), SUPERSONIC CHARACTERISTICS, EQUATIONS OF MOTION, PROBLEM SOLVING, INTERACTIONS, FLOW FIELDS, DIFFERENCE EQUATIONS, SHEAR STRESSES, MATHEMATICAL MODELS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE