DES computational study of aero-ramp injectors integrated with gas-portfire in supersonic flow

Detached eddy simulation (DES) and Reynolds average Navier-Stokes (RANS) models based on shear stress transport (SST) k-ω two-equation model are used to simulate the flow field of aero-ramp injectors integrated with gas-portfire, which is a new method to enhance mixing in supersonic flow. Results show that the DES model is able to capture more detailed flow structures such as eddies and separation zones as compared with the RANS method. A characteristic degree is selected to evaluate the accuracy of DES and RANS results by comparing them with experimental results. The results show that the characteristic degree in DES, RANS and experiments are 48°, 37° and 47°respectively. The results obtained by the DES model agree much better with experimental results than the RANS method. Therefore, the DES model is considered more suitable to simulate an aero-ramp injectors integrated with a gas-portfire flow field.