Accession Number : ADP005128

Title :   Numerical Investigation of the Laminar Boundary Layer on a 3-D Body Started Impulsively from Rest,

Corporate Author : TECHNICAL UNIV OF ISTANBUL (TURKEY) FACULTY OF AERONAUTICS AND ASTRONAUTIC

Personal Author(s) : Gulcat,U.

Report Date : NOV 1986

Pagination or Media Count : 6

Abstract : Unsteady flow of viscous incompressible fluid external to three dimensional bodies is considered. Based on the boundary layer concept the simplified version of the equations of motion are expressed in nonorthogonal coordinates which fits to body surface. The differential form of the equations are discretised with finite differencing to give a solution procedure which does not require any iteration discretised with finite differencing to give a solution procedure which does not require any iteration cylinder. The results obtained are compared with the experimental and the results of the previous numerical works available. Finally three dimensional impulsive flow past an oblate spheroid is considered. The metric coefficients and all the necessary geometrical features obtained analytically are used in the governing equations. The numerical solution is carried until the time of flow reversal that occurs at the rear stagnation point of the spheroid.

Descriptors :   *LAMINAR BOUNDARY LAYER, *THREE DIMENSIONAL FLOW, UNSTEADY FLOW, VISCOUS FLOW, INCOMPRESSIBLE FLOW, FINITE DIFFERENCE THEORY, INCOMPRESSIBLE FLOW, STAGNATION POINT, VORTICES

Distribution Statement : APPROVED FOR PUBLIC RELEASE