In response to the fourth AIAA CFD Drag Prediction Workshop, the NASA Common Research Model wing–body and wing–body–tail configurations are analyzed using the Reynolds-averaged Navier–Stokes flow solvers CFL3D and OVERFLOW. Two families of structured, overset grids are built. Grid Family 1 consists of a coarse (7.2 million), medium (16.9 million), fine (56.5 million), and extra-fine (189.4 million) mesh. Grid Family 2 is an extension of the first and includes a super-fine (714.2 million) and an ultra-fine (2.4 billion) mesh. The medium grid anchors both families with an established build process for accurate cruise drag prediction studies. This base mesh is coarsened and enhanced to form a set of parametrically equivalent grids that increase in size by a factor of roughly 3.4 from one level to the next denser level. Both CFL3D and OVERFLOW are run on Grid Family 1 using a consistent numerical approach. Additional OVERFLOW runs are made to study effects of differencing scheme and turbulence model on Grid Family 1 and to obtain results for Grid Family 2. All CFD results are post-processed using Richardson extrapolation, and approximate grid-converged values of drag are compared. The medium grid is also used to compute a trimmed drag polar for both codes.


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    Title :

    Drag Prediction for the Common Research Model Using CFL3D and OVERFLOW



    Published in:

    Journal of Aircraft ; 51 , 4 ; 1101-1117


    Publication date :

    2014-04-28


    Size :

    17 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Drag Prediction for the Common Research Model Using CFL3D and OVERFLOW

    Sclafani, A.J. / DeHaan, M.A. / Vassberg, J.C. et al. | British Library Conference Proceedings | 2014


    Drag Prediction for the Common Research Model Using CFL3D and OVERFLOW

    Sclafani, A.J. / DeHaan, M.A. / Vassberg, J.C. et al. | British Library Conference Proceedings | 2014



    Drag Prediction for the NASA CRM Wing-Body-Tail Using CFL3D and OVERFLOW on an Overset Mesh

    Sclafani, Anthony J. / DeHaan, Mark A. / Vassberg, John C. et al. | NTRS | 2010