Abstract
Numerical study of flow over sphere at supercritical Reynolds numbers by SST equations model and DES method based on SST model has been done. The simulation on Re = 9.4×105,1.88×106,2.82×106were given. Compared with the Results of experiments, the calculations of drag coefficients at Re=1.88×106、2.82×106agreed well with Achenbach’s results. The trailing vortex structure was shown through the identification method of three dimensional flow field. It had a good agreement with Taneda’s results. The time histories and spectrum characteristics of the drag and the lateral force were investigated by the transient mothod.
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