Dynamic Simulation through Analytic Extrapolation

In spite of the rapid progress of computational fluid dynamics (CFD) the existing capability to predict fullscale missile dynamics is very limited. The main reason for this is the existing strong coupling between boundarylayer transition and vehicle motion, which cannot be simulated by present CFD methods and can be obtained experimentally only in tests at the full-scale Reynolds number. The present paper describes the interactive use of theoretical and experimental techniques to provide the means to "extrapolate analytically" to full-scale flight conditions. This capability is especially needed in regard to elastic vehicle dynamics because of the difficulties inherent in performing dynamic simulation of an elastic vehicle in the high Reynolds number ground testing facilities presently becoming available.

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