Property evaluation on turbulence models calculation in hypersonic heat transfer simulation

Factors that influence the prediction accuracy of hypersonic heat transfer simulation under turbulence were studied with the double ellipsoid model by the means of computational fluid dynamic. Four popular turbulent models, which include the Baldwin-Lomax(BL) model, the Spalart-Allmaras(SA) model, the Wilcox k-ω model and the Menter shear-stress transport(SST) model, were employed in the study of heat transfer simulation, their performances were assessed, the dependence of heat transfer on grid Reynolds number was assessed. Besides, the connection between sweep angle and the heat in stagnation point was established by simulation with seven different sweep angles in blunt fin. The results indicate that the Two equation model, especially the SST model, is more suitable for the heat transfer simulation in reattaching flow than the One equation model and the Zero equation model. The results also show that the maximum heat of blunt fin varies non-monotonic with the sweep angle and reaches a peak value when the sweep angle is about 22°.