Accession Number : ADA008005

Title :   Finite-Difference Solution of the Laminar Supersonic Near Wake - A Posteriori Error Study and Physical Discussion.

Descriptive Note : Interim rept.,


Personal Author(s) : Ross,Bruce B. ; Cheng,Sin-I

Report Date : OCT 1974

Pagination or Media Count : 240

Abstract : Solutions of the planar, laminar near wake behind a supersonic rectangular-based body have been obtained using a finite-difference approximation of the full compressible Navier-Stokes equations. Use is made of the basic numerical wake model and finite-difference iteration technique developed by Allen and Cheng. The present study extends this wake model to include a linear variation of viscosity and heat conductivity with temperature, establishes a posteriori: the errors of the numerical solution, and then investigates various physical properties of the wake solutions over a range of flow parameters within the range of validity of the numerical solution. An extensive investigation is made of the sensitivity of the wake solutions to the choice of model configuration and boundary condition treatment with the purpose of determining major error sources and reducing their influence on the wake solutions under the financial constraints of the computational program.

Descriptors :   *Rectangular bodies, *Supersonic Flow, *Wake, Laminar flow, Stagnation point, Boundary layer, Finite difference theory, Mathematical models, Computer programming

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE