Prediction of Gust Loadings and Alleviation at Transonic Speeds.
Final rept. 20 Sep 83-20 Jul 85,
NIELSEN ENGINEERING AND RESEARCH INC MOUNTAIN VIEW CA
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The transonic indicial theory is used to predict the effect of a gust on an airfoil at transonic speeds. The effect of operating two control surfaces is also modeled by the indicial method. The transonic indicial mehtod is linear in a strained coordinate system and superposition can be used. This allows the effects of an arbitrary gust and control surface deflection to be modeled simply if the indicial responses for the gust and each control surface are known. The computation time is small and, therefore, an optimization technique can be used to detrmine the best contorl surface deflections to alleviate the gust loading. Keywords Transonic flow Unsteady aerodynamics.
- Fluid Mechanics