Abstract
The purpose of the paper is to demonstrate how a simple analytic theory that uses static experimental data as an input, can predict the observed large adverse effects of separated flow on the vehicle dynamics of heat-sink type re-entry bodies and elastic launch vehicles. The theory is based on quasi-steady-flow concepts in which the time history effects are lumped to one discrete past time event. The analytic difficulties consist largely of insufficient capability in predicting the composition of static loads in regions of separated flow, even when static experimental data are available. If more basic knowledge were available about nonsymmetric stationary separated flow, very substantial improvement in existing capability to predict dynamic effects of separated flow would result.
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