Three dimensional experimental investigation of a hypersonic double-ramp flow

Summary. The flow over a 15◦-45 ◦ double compression ramp was studied at Mach 7.5. CFD computations are compared to 2 component PIV (particle image velocimetry) measurements. Furthermore stereoscopic PIV was used to measure the three component velocity vector, enabling to perform a 3D flow survey. The overall flow topology is assessed and special attention is devoted to the separated region. Finally the effect of a sharp leading edge on the separation region is investigated.