Second-order reynolds stress turbulence modeling of three-dimensional oblique supersonic injection
Conference Paper
Overview
Overview
abstract
1998 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. The full, three-dimensional Favr-averaged Navier Stokes equations, coupled with the second-order Zhang, So, Gatski and Speziale (ZSGS) Reynolds stress turbulence model (RSTM) and the ZSGS K model were used to numerically simulate 25 degree, Mach 1.8 injection into a Mach 3.0 crossflow. Detailed comparisons with experimental data were performed. Analysis of the RSTM simulation results revealed physically consistent and accurate predictions for mean flow and turbulent quantities, while the simulations with the K model resulted in non-physical and inconsistent turbulence predictions. Analysis of the three-dimensional flowfield simulation with the RSTM show the shock structure downstream of the oblique barrel (OB) shock was a mirrored image of the leeward side of the OB shock. Furthermore, it was seen that the downstream location where vortical motion was initiated in the jet plume was caused by the recompression shock induced (RSI) vortices. These vortices were generated through the combined effects of the inflow air upwash behind the plume and the mirrored oblique-barrel shock.
