Accession Number : AD0601503

Title :   THE GROWTH OF TURBULENT BOUNDARY LAYERS.

Descriptive Note : Technical Information series,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s) : Walker,G. K. ; Schumann,B. A.

Report Date : 31 JUL 1964

Pagination or Media Count : 54

Abstract : Turbulent boundary-layer theory and experimental data are combined to yield engineering relations for the total, momentum, and displacement boundary-layer thicknesses. For local Mach numbers between zero and five, the Eckert reference-enthalpy method is shown to correlate the experimental momentum thickness data obtained from flows over a non-porous flat plate with zero dissociation. Experimental data for the ratios of total and displacement thicknesses to the momentum thickness are correlated by modified Bloom and Martellucci equations. Finite pressure gradient effects, mass addition effects, and dissociation effects are investigated theoretically. For local Mach numbers greater than five, experimental temperature and velocity data indicate that Crocco's integral is not valid in this Mach number regime. Boundary-layer thickness data are observed to lie significantly below the semiempirical relations derived with the assumption that Crocco's integral is valid. It is concluded that for the general case the total, momentum, and displacement thicknesses can be estimated within about = 40%. (Author)

Descriptors :   (*TURBULENT BOUNDARY LAYER, THICKNESS), FLUID DYNAMICS, THERMODYNAMICS, THEORY, EXPERIMENTAL DATA, CORRELATION TECHNIQUES, ENTHALPY, FLUID FLOW, FLAT PLATE MODELS, PRESSURE, MOMENTUM, MATHEMATICAL ANALYSIS, GRAPHICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE