Progress on a Base Flow Model for External Burning Propulsion,

Abstract

Progress is described on a model of the turbulent axisymmetric base flow behind bluff-base bodies. The purpose of the model is to provide an analytical basis for incorporation of external burning and base injection effects upon the base flow. An integral technique is used for solution of the problem. At the current time , however , extreme difficulties are being encountered in the choi ce of field variable profiles to insert in the integral technique. Several choices of profiles and governing moment equations are yiel ding a singulari ty before the rear stagnation point is reached in a downstream, integration of the equation .

Analytical Model of Supersonic, Turbulent, Near-Wake Flows

“…8) encountered an extraneous singularity in their analysis of near-wake flows without base bleed. They were able to remove the singular behavior by changing their velocity profile functions in the region upstream of recompression (Ref.…”

“…They were able to remove the singular behavior by changing their velocity profile functions in the region upstream of recompression (Ref. 9). Various modifications of the concentration profile function in the present analysis have been tried, but to no avail; the wake regime singularity occurs for both single gas flows and for flows in which the base bleed gas is different from the outer-stream gas.…”