Predictions of Transverse Injection of Air or Helium into Supersonic Crossflow.

Predictions of a sonic jet of air or helium injected into a Mach 2 crossflow are presented. The injection is transverse, characterized as a jet in crossflow (JICF). The Wilcox two-equation model was used to model turbulence. The predictions are steady and symmetric about the center of the circular injection hole. Results from the two cases are compared with ensemble-averaged experimental results by Gruber et al. (1996). Predictions of shock structures, including the barrel shock and Mach disk, and the counter-rotating vortex pair that dominates mixing are in good agreement with the experiment