Accession Number : AD0773166

Title :   Computational Analysis of Unsteady Circumferential and Radial Distortion in Subsonic Diffusers.

Descriptive Note : Final rept. 3 Nov 72-30 Jun 73,


Personal Author(s) : Erdos,John I. ; Ranlet,John D.

Report Date : AUG 1973

Pagination or Media Count : 116

Abstract : Two computational models of the unsteady flow in the subsonic diffuser section of an axisymmetric, external compression, supersonic inlet are described. The first pertains to the inviscid flow on a cylindrical stream surface through the diffuser, from the terminal shock to a discharge station representing the engine face. The equations of motion for a compressible gas are solved numerically by a second order finite difference technique. Several numerical examples are carried out to illustrate the capabilities of the computational model; the results are discussed and interpreted in relation to the problem of experimental simulation of circumferential distortion. The second computational model pertains to the axisymmetric flow in meridional planes through the subsonic diffuser. (Modified author abstract)

Descriptors :   *Diffusers, *Subsonic flow, *Mathematical models, *Nonuniform flow, Supersonic diffusers, Inviscid flow, Numerical methods and procedures, Inlets, Distortion, Equations of motion, Cylindrical bodies

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE