Accession Number:

AD0432491

Title:

THE SEPARATION OF AXIALLY SYMMETRIC TURBULENT BOUNDARY LAYERS. PART II. DETAILED MEASUREMENTS IN THE BOUNDARY LAYERS ON SEVERAL SLENDER BODIES IN INCOMPRESSIBLE FLOW,

Descriptive Note:

Corporate Author:

DOUGLAS AIRCRAFT CO INC LONG BEACH CALIF

Personal Author(s):

Report Date:

1955-08-02

Pagination or Media Count:

120.0

Abstract:

Detailed measurements of turbulent boundary layer velocity profiles and shear stress distributions on three slender bodies of revolution in incompressible flow are presented. Comparison of the results with those found in two-dimensional flows indicates no appreciable influence of lateral curvature on the Law of the Wall or use of H as a shape parameter for the outer region of the velocity profile except where the boundary layer thickness exceeds body radius. Values of wall shear stress determined by the method of Clauser-Coles are in excellent agreement with values measured using a shear stress pitot tube according to the method of Preston, while those predicted by the LudwiegTillmann formula are greater than measured values in the adverse pressure gradient regions of the flows. Disturbing the turbulent layer at transition by blowing through the surface leads to an increase in theta and a reduction in H which delays separation slightly when compared with the undisturbed layer. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE