Accession Number : AD0432135

Title :   BOUNDARY LAYER TRANSITION--FREE-STREAM TURBULENCE AND PRESSURE GRADIENT EFFECTS,

Corporate Author : NORTH AMERICAN AVIATION INC DOWNEY CALIF

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

Report Date : APR 1963

Pagination or Media Count : 21

Abstract : A theory of boundary layer transition is presented which includes the effects of free-stream turbulence and pressure gradient. The basic notion underlying the development concerns the remoteness of the boundary layer vorticity from the surface. The theory agrees well with experimental data. The laminar boundary layer solutions of Pohlhausen and Falkner-Skan are used to calculate the effect of pressure gradient on transition. Engineering formulas are presented and one example is calculated showing the application of the theory to a body of revolution. The theory can also indicate the effects of Mach number and heat transfer. (Author)

Descriptors :   (*BOUNDARY LAYER TRANSITION, THEORY), LAMINAR FLOW, VORTICES, SHEAR STRESSES, TURBULENCE, PRESSURE, LAMINAR BOUNDARY LAYER, THICKNESS, MATHEMATICAL ANALYSIS, COMPRESSIBLE FLOW

Distribution Statement : APPROVED FOR PUBLIC RELEASE