Numerical Study of Flow over Sphere at Supercritical Reynolds Numbers

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 = 9.4×105,1.88×106,2.82×106 were given. Compared with the Results of experiments, the calculations of drag coefficients at Re=1.88×106、2.82×106 agreed 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.