Far-Field Drag Decomposition Applied to the Drag Prediction Workshop 5 Cases
| Autor: | Eric Laurendeau, Jean-Yves Trépanier, Benoit Malouin, Martin Gariépy |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Lift-to-drag ratio
Engineering Drag coefficient Lift-induced drag business.industry Aerospace Engineering Mechanics Physics::Fluid Dynamics Classical mechanics Parasitic drag Drag Drag divergence Mach number Aerodynamic drag Zero-lift drag coefficient Astrophysics::Earth and Planetary Astrophysics business |
| Zdroj: | Journal of Aircraft. 50:1822-1831 |
| ISSN: | 1533-3868 0021-8669 |
| Popis: | A far-field drag prediction and decomposition method has been applied to the results of the AIAA Drag Prediction Workshop 5 held in Louisiana during the summer of 2012. The method has two principal advantages: it allows the removal of spurious drag inherent to computational fluid dynamics solutions, and it allows the decomposition of drag into viscous, wave, and induced physical drag components. This research shows that accurate drag coefficients can be predicted on coarse grids when the spurious drag is extracted with the far-field method and that these results are closer to experimental values than drag coefficients computed on finer meshes when spurious drag is not extracted. The research also investigated the reasons behind the lift and drag losses found by some participants in the workshop. It is shown that the lift loss is caused by the boundary-layer separation at the wing root, inducing a reduction of 20% of the shock wave drag and a significant change in the wing loading. The initiation of buffet... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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