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NUMERICAL STUDY OF A DELTA PLANFORM WITH MULTIPLE JETS IN GROUND EFFECT
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English
Abstract
The flow past a 60° delta wing equipped with two thrust-reverser jets near the inboard trailing edge has been analyzed by numerical solution of the three-dimensional thin-layer Navier-Stokes equations. An implicit, partially flux-split, approximately-factored Navier-Stokes solver coupled with a multiple grid embedding scheme has been adapted to this problem. Studies of the impact of numerical parameters (e.g., grid refinement and dissipation levels), and flow field parameters such as the height of the delta wing above the ground plane and the jet size on the solution, were performed. Results of these numerical studies indicate some challenges in the accurate resolution of complex three-dimensional free shear layers and jets. Nevertheless, flow features such as jet deformation and ground vortex formation observed in experimental flow visualizations are captured. Further, comparisons with experimental data confirm the ability to simulate the loss of wing-borne lift, commonly referred to “suckdown,” as the delta planform flies at slow speeds in close proximity to the ground. Detailed analysis of the numerical results has also given additional insight into the structure of the ground vortex and the mechanisms of lift loss.
Authors
Citation
Chawla, K., Van Dalsem, W., and Rao, K., "NUMERICAL STUDY OF A DELTA PLANFORM WITH MULTIPLE JETS IN GROUND EFFECT," SAE Technical Paper 892283, 1989, https://doi.org/10.4271/892283.Also In
References
- Van Dalsem W. R. “Study of Jet in Ground Effect with Crossflow Using the Fortified Navier-Stokes Scheme,” AIAA-87-2279-CP Monterey, CA August 17-19 1987
- Paulson J. W. Kemmerly G. T. “An Assessment of Ground Effects Determined by Static and Dynamic Testing Techniques,” Ground Effects Workshop, NASA Ames Research Center April 22-23 1987
- Steger J. L. Ying S. X. Schiff L. B. “A Partially Flux Split Algorithm for Numerical Simulation of Compressible Inviscid and Viscous Flow,” Workshop on Computational Fluid Dynamics, Institute of Non-Linear Sciences University of California Davis, CA 1986
- Pulliam T. H. Chaussee D. S. “A Diagnol Form of an Implicit Approximate Factorization Algorithm,” Journal of Computational Physics 39 347 1981
- Dougherty F. C. Kuan J. H. “Transonic Store Separation Using a Three-Dimensional Chimera Grid Scheme,” AIAA-89-0637 Reno, NV Jan 9-12 1989
- Meakin R. L. Suhs N. E. “Unsteady Aerodynamic Simulation of Multiple Bodies in Relative Motion,” AIAA-89-1996 Buffalo, NY June 13-15 1989
- Steger J. L. Chaussee D. S. “Generation of Body-Fitted Coordinates Using Hyperbolic Partial Differential Equations,” SIAM Journal of Sci, Stat. Computing 1 4 Dec 1980
- Benek J.A. Buning P.G. Steger J.L. “A 3-D Chimera Grid Embedding Technique,” AIAA-85-1523 Cincinnati, OH July 15-17 1985
- Benek J.A. Donegan T. L. Suhs N. E. “Extended Chimera Grid Embedding Scheme with Application to Viscous Flows,” AIAA-87-1126-CP Honolulu, HI June 9-11 1987