Publications
Evaluation of two-equation RANS models for simulation of jet-in-crossflow problems
Results from an investigation of the predictive capabilities of various two-equation RANS models for the jet-in-crossflow problem are presented. The flow regime consists of a supersonic jet issuing into a transonic cross flow. The parameters varied are the jet momentum ratio, jet inclination angle, and cross flow Mach number. The goal of the investigation is to characterize the behavior of the turbulence models in this flow regime - this has implications for accurate predictions of vortex-fin interactions. The results of this study show that none of the RANS model examined are capable of capturing the vortex location and strength accurately. A detailed analysis of available experimental data shows that the Boussinessq approximation, fundamental to these models, is itself deficient for this category of flows. The analysis shows that vastly different length scales are associated with each component of the Reynolds stress and a single length scale model deficient in capturing this.