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- W382068148 abstract "The effects of coupled and uncoupled bending and torsion modes on flexible twin-tail buffet, due to the unsteady vortex breakdown flow of a 76° sharp-edged delta wing, are considered. This multidisciplinary problem is investigated using three sets of equations on a multi-block grid structure. The first set is the unsteady, compressible, Reynolds-averaged, full NavierStokes equations which are used for obtaining the flow-filed vector and the aerodynamic loads on the twin tails. The second set is the aeroelastic equations for coupled and uncoupled bending and torsion modes which are used for obtaining the bending and torsional deflections of the twin tails. The third set is the grid-displacement equations which are used for updating the grid coordinates due to the tail deflections. These sets are sequentially solved accurately in time at each time step. The turbulent model used is the Baldwin-Lomax algebraic model which is modified by Degani and Schiff for cross flow separation. The configuration is pitched at 35° angle of attack and the freestream Mach number and Reynolds number are 0.3 and 1.25 million, respectively. Keeping the twin tails as rigid surfaces, the problem is solved for the initial flow conditions. Next, the problem is solved for the flexible twin tails responses due to the unsteady loads produced by the vortex breakdown flow of the delta-wing leading-edge vortex cores. The configuration is investigated for the effect of coupled and uncoupled bending and torsion modes using two different separation distances of the twin-tail; the inboard and the outboard positions. The computational results are in very good agreement with the experimental data of Washburn, et al." @default.
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- W382068148 date "1998-01-01" @default.
- W382068148 modified "2023-09-23" @default.
- W382068148 title "Effects of Coupled and Uncoupled Bending-Torsion Modes on Twin-Tail Buffet Response" @default.
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- W382068148 doi "https://doi.org/10.1007/978-94-011-5042-2_34" @default.
- W382068148 hasPublicationYear "1998" @default.
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