Vertical Tail Dynamic Response in Vortex Breakdown Flow
DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) PLATFORM SCIENCES LAB
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The paper describes the development of an aeroelastic model for the prediction of empennage dynamic response due to vortex induced buffet loads. The multidisciplinary problem of tail buffeting is solved accurately in the time domain using an unsteady vortex model for prediction of aerodynamic loads and coupled aeroelastic equations for the bending and torsional deflections of the tail which are resolved using the Galerkin method. A dynamic aeroelastic analysis of empennage buffet is performed for a generic delta wing, twin vertical-tail configuration at high angles of attack. Results of computations are validated using experimental and flight test data. The present research provides advances in the predictive capability and our understanding of aircraft empennage buffet.