This work examines numerical simulation of supersonic, subsonic, and transonic flows over a bluff body using several numerical techniques. Comparisons between computational fluid dynamics predictions and wind-tunnel test data are shown. The wind-tunnel test used a 7.66%-scale model of the crew module for NASA’s multipurpose crew vehicle. A variety of freestream conditions consisting of three Mach numbers and three angles of attack are considered. The wind-tunnel test data include time-averaged integrated forces and moments, static pressure port measurements, and unsteady frequency response. Results obtained using the Spalart–Allmaras Reynolds-averaged Navier–Stokes turbulence model are compared to solutions computed using detached-eddy simulation. Furthermore, low-dissipation numerical fluxes are applied in order to assess their effect on solution fidelity. Across the cases examined, the Reynolds-averaged Navier–Stokes model has difficulty matching the vehicle surface pressures. For supersonic and transonic flows, detached-eddy simulation agrees well with the experiment. Subsonic flows still prove difficult for the methods explored in this work, but detached-eddy simulation and low-dissipation numerical fluxes provide the most accurate prediction of the test data.


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    Title :

    Detached-Eddy Simulation of Capsule Wake Flows and Comparison to Wind-Tunnel Test Data


    Contributors:

    Published in:

    Publication date :

    2015-03-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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