Accession Number:

AD0631329

Title:

STUDY OF A GENERAL METHOD SOLUTION TO THE INCOMPRESSIBLE TURBULENT BOUNDARY LAYER EQUATIONS,

Descriptive Note:

Corporate Author:

DOUGLAS AIRCRAFT CO INC LONG BEACH CALIF AIRCRAFT DIV

Personal Author(s):

Report Date:

1965-11-11

Pagination or Media Count:

127.0

Abstract:

This work is an attempt to develop a general method of solution to the mean time averaged flow equations governing the turbulent boundary layer. The problem of incompressible flow is considered as an initial step towards the solution of the more general problem of compressible flow. In the approach adopted, once the Reynolds shear stress is formulated in terms of an eddy viscosity, no further approximations are made. The accuracy of the eddy viscosity can be assessed only by comparison of the calculated results with experimental data. An eddy viscosity formulation believed to incorporate the latest knowledge on turbulent boundary layers has been made. Calculations have been made for a considerable number of flows and comparison with experimental data indicates that the present formulation has produced remarkably accurate solutions. However, there do exist disagreements in regions of high adverse pressure gradients which warrant further study and perhaps modification of the present eddy viscosity formulation. At this time the work is mostly of scientific value. That is, it answers the question of what can be accomplished by accurate calculations employing the eddy viscosity concept. A practical working method has not yet been attained. Calculations are so involved that large computing times are required one hour being necessary for some of the more difficult problems.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE