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Grid-Adapted FUN3D Computations for the Second High Lift Prediction WorkshopContributions of the unstructured Reynolds-averaged Navier-Stokes code FUN3D to the 2nd AIAA CFD High Lift Prediction Workshop are described, and detailed comparisons are made with experimental data. Using workshop-supplied grids, results for the clean wing configuration are compared with results from the structured code CFL3D Using the same turbulence model, both codes compare reasonably well in terms of total forces and moments, and the maximum lift is similarly over-predicted for both codes compared to experiment. By including more representative geometry features such as slat and flap brackets and slat pressure tube bundles, FUN3D captures the general effects of the Reynolds number variation, but under-predicts maximum lift on workshop-supplied grids in comparison with the experimental data, due to excessive separation. However, when output-based, off-body grid adaptation in FUN3D is employed, results improve considerably. In particular, when the geometry includes both brackets and the pressure tube bundles, grid adaptation results in a more accurate prediction of lift near stall in comparison with the wind-tunnel data. Furthermore, a rotation-corrected turbulence model shows improved pressure predictions on the outboard span when using adapted grids.
Document ID
20140011405
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Lee-Rausch, E. M.
(NASA Langley Research Center Hampton, VA, United States)
Rumsey, C. L.
(NASA Langley Research Center Hampton, VA, United States)
Park, M. A.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 8, 2014
Publication Date
June 16, 2014
Subject Category
Fluid Mechanics And Thermodynamics
Computer Programming And Software
Report/Patent Number
NF1676L-17570
AIAA Paper 2014-2395
Meeting Information
Meeting: AIAA Aviation and Aeronautics Forum and Exposition (AVIATION 2014)
Location: Atlanta, GA
Country: United States
Start Date: June 16, 2014
End Date: June 20, 2014
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 380046.02.07.03.03.02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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