Bow shock/jet interaction in compressible transverse injection flowfields

The interaction between the bow and separation shocks formed upstream of the injection plume in flowfields created by transverse injection into supersonic crossflows is studied along with the large-scale eddies that develop at the jet/freestream interface. Results indicate that the large structures strongly influence the near-wall behavior of the bow shock, often resulting in severe curvature changes and positional fluctuations. The eddies exert a weaker influence on the bow shock farther away from the wall. Lifting of the bow shock is observed when the approaching boundary layer is relatively thick. In these cases, injectant and freestream fluid mix subsonically upstream of the injector orifice, exacerbating the hot-spot phenomenon found in reacting transverse injection flowfields. Finally, the injector geometry strongly affected the upstream separation zone, bow shock standoff distance, and bow shock strength. (AIAA)