Statistical Analysis of CFD Solutions from the Third AIAA Drag Prediction Workshop

Joseph H Morrison; Michael J Hemsch

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NASA NTRS · 20070004881

Statistical Analysis of CFD Solutions from the Third AIAA Drag Prediction Workshop

Joseph H Morrison·Michael J Hemsch

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Abstract

The first AIAA Drag Prediction Workshop, held in June 2001, evaluated the results from an extensive N-version test of a collection of Reynolds-Averaged Navier-Stokes CFD codes. The code-to-code scatter was more than an order of magnitude larger than desired for design and experimental validation of cruise conditions for a subsonic transport configuration. The second AIAA Drag Prediction Workshop, held in June 2003, emphasized the determination of installed pylon-nacelle drag increments and grid refinement studies. The code-to-code scatter was significantly reduced compared to the first DPW, but still larger than desired. However, grid refinement studies showed no significant improvement in code-to-code scatter with increasing grid refinement. The third Drag Prediction Workshop focused on the determination of installed side-of-body fairing drag increments and grid refinement studies for clean attached flow on wing alone configurations and for separated flow on the DLR-F6 subsonic transport model. This work evaluated the effect of grid refinement on the code-to-code scatter for the clean attached flow test cases and the separated flow test cases.

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Statistical analysis CFD codes Airframes Flow conditions Reynolds Averaged Navier Stokes Applied aerodynamics Lift coefficient Skin friction coefficient Lift to drag ratio Wing body configuration

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BibTeX RIS

Joseph H Morrison, Michael J Hemsch. 2007-01-08. Statistical Analysis of CFD Solutions from the Third AIAA Drag Prediction Workshop. https://ntrs.nasa.gov/citations/20070004881

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