Abstract

An analytical methodology based on the Lees-Klineberg moment integral theory for two-dimensional, laminar, hypersonic viscous interaction has been developed to evaluate the aerodynamic control surface effectiveness of hypersonic winged vehicles, such as the Space Shuttle Orbiter, during high-angle-of-attack reentry. A quasi-three-di mensional approach, i.e., a strip analysis of the vehicle planform, is used. Computed incremental aerodynamic coefficients produced by flap/elevon deflections of the Space Shuttle Orbiter correlate very favorably with wind-tunnel test data. Qualitative control effectiveness trends due to the effects of wall cooling, Reynolds number, and finite control surface chord length are discussed.

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