The interaction of a lateral jet and a hypersonic cross-flow was analysed using the TAU-code of DLR with mesh refinement and turbulence modeling. Parameter variations concerned the cross flow Mach number M_∞ = 6 / 11.5 / 17.5 and the atmospheric altitude H = 39 / 49 / 60 km. Perfect and real gas behavior have been simulated in the high hypersonic flow domain. The main outcomes as contribution to fundamental research on plume cross-flow interactions in hypersonics are: a) increasing Mach number M_∞ diminish the lateral jet extension, b) rising Mach number M_∞ induce the force amplification factor K to rise, c) real gas effects slightly influence K, d) the jet pressure ratio plays a minor role with respect to K, e) the angle of attack influences K strongly and d) a downstream facing horseshoe vortex street is induced by the jet obstacle, but vanishing with increasing Mach number M_∞.
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