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Development of Subsonic Base Pressure Prediction Methods

Report Number: AFFDL TR 65-157 Volume 1
Author(s): J. E. Butsko; W. V. Carter; W. Herman
Corporate Author: GD/Convair, General Dynamics Corporation
Laboratory: Air Force Flight Dynamics Laboratory
Date of Publication: 1965-09
Pages: 171
Contract: AF 33(615)-1615
Project: 1366
Task: 136613
AD Number: AD0475670

A combined analytic-experimental investigation of the subsonic base pressure phenomenon, especially as applied to blunt bodies typical of hypersonic flight vehicles, results in the development of a generalized method to predict base pressure in three-dimensional flow at subsonic speeds. A mathematical description of the fluid mechanics of steady two-dimensional subsonic base flow is developed. Two and three-dimensional wind tunnel testing of blunt based configurations is used to verify the two-dimensional analytic solution and obtain empirical relations which extend the analysis to three-dimensional base flow.

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