LES/RANS hybrid method for supersonic axisymmetric base flow

To overcome the limitation of large eddy simulation (LES) for wall problem, LES/RANS hybrid method was investigated in recent years, which not only combined the advantages of LES and RANS but also avoided the disadvantages of each other. Base flow is a difficult problem in CFD. Based on LES/RANS hybrid method, Smagorinsky-BL model and a new Vreman-BL model were applied to an axisymmetric base flow at supersonic conditions. The obtained base flow structure was analyzed in comparison with experimental data. The results show that predictions of velocity, pressure distribution, velocity and pressure distributions of base flows using hybrid method compare well with experimental data.