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Computation and validation of fluid/structure twin tail buffet response
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kandil, Osama A. Liu, C. H. Massey, Steven J. Sheta, Essam F. |
| Copyright Year | 1996 |
| Description | The buffet response of the flexible twin-tail/delta wing configuration, a multidisciplinary problem, is solved using three sets of equations on a multi-block grid structure. The first set is the unsteady, compressible, full Navier-Stokes equations which are used for obtaining the flow-field vector and the aerodynamic loads on the twin tails. The second set is the coupled aeroelastic equations 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. The computational model is similar to the one used by Washburn et. al. which consists of a delta wing of aspect ratio one and twin tails with taper ratios of 0.23. The vortex of the twin tails are located at the wing trailing edge. The configuration is pitched at 30 deg angle of attack, and the freestream Mach number and Reynolds number are 0.3 and 1.25 million, respectively. With the twin tails fixed as rigid surfaces, the problem is solved for the initial flow conditions. Next, the problem is solved for the twin tail response for uncoupled bending and torsional vibrations due to the unsteady loads produced by the vortex breakdown flow of the leading-edge vortex cores. The configuration is investigated for three spanwise positions of the twin tails; inboard, midspan and outboard locations. The computational results are validated and are in very good agreement with the experimental data of Washburn, et. al. |
| File Size | 707158 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970022592 |
| Archival Resource Key | ark:/13960/t18m27p49 |
| Language | English |
| Publisher Date | 1996-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Stability And Control Tail Assemblies Flexible Bodies Computational Fluid Dynamics Vortex Breakdown Unsteady Flow Torsional Vibration Navier-stokes Equation Bending Moments Multiblock Grids Delta Wings Trailing Edges Body-wing and Tail Configurations Angle of Attack Aeroelasticity Buffeting Fighter Aircraft Leading Edges Bending Vibration Compressible Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
