Accession Number : AD0757531

Title :   Evaluation of Separation Criteria and Their Application to Separated Flow Analysis.

Descriptive Note : Final rept. 24 Jan 72-24 Jan 73,

Corporate Author : BOEING COMMERCIAL AIRPLANE CO SEATTLE WASH

Personal Author(s) : Hahn,Mansop ; Rubbert,Paul E. ; Mahal,Avtar S.

Report Date : 24 JAN 1973

Pagination or Media Count : 80

Abstract : Various criteria of turbulent boundary layer separation have been reviewed for two- and three-dimensional flows at subsonic and transonic Mach numbers. Six criteria which predict separation have been evaluated by comparing their predictions with the results of a number of separated flow experiments. A modified form of Townsend;s criterion predicts satisfactorily both separation pressure and separation location for subsonic flow. An approach based on calculation of the boundary layer characteristics along the surface has proved to be quite satisfactory for predicting both separation pressure and location for subsonic flow. A boundary condition requiring constant pressure on the surface in the separated region has been used to determine the fluid emission. (Author Modified Abstract)

Descriptors :   (*TURBULENT BOUNDARY LAYER, *FLOW SEPARATION), TWO DIMENSIONAL FLOW, THREE DIMENSIONAL FLOW, SUBSONIC CHARACTERISTICS, TRANSONIC CHARACTERISTICS, MATHEMATICAL PREDICTION, MATHEMATICAL MODELS, AIRFOILS

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE