Statistical Analysis of the Fifth Drag Prediction Workshop Computational Fluid Dynamics Solutions

A statistical analysis of the results from an extensive N-version test of a collection of Reynolds-averaged Navier–Stokes computational fluid dynamics codes is presented. The solutions were obtained by code developers and users from the United States, Europe, Asia, and Russia using a variety of grid systems and turbulence models for the June 2009 Fourth Drag Prediction Workshop sponsored by the AIAA Applied Aerodynamics Technical Committee. The aerodynamic configuration for this workshop was a new subsonic transport model, the Common Research Model, designed using a modern approach for the wing and included a horizontal tail. The fourth workshop focused on the prediction of both absolute and incremental drag levels for wing–body and wing–body–horizontal-tail configurations. This work continues the statistical analysis begun in the earlier workshops, and compares the results from the grid-convergence study of the most recent workshop with earlier workshops using the statistical framework.

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