EXPANSION CORNER EFFECTS ON HYPERSONIC SHOCK-WAVE TURBULENT BOUNDARY-LAYER INTERACTIONS

An experimental program has been conducted to investigate the behavior of hypersonic shock wave/turbulent boundary-layer interactions in the vicinity of an expansion corner. Tests were run in the Calspan 96-in. shock tunnel at nominal Mach 11.5 freestream conditions for a unit Re ynolds number of approximately 18 x 10(6)/ft, Fully turbulent boundary layers were generated with a flat plate, and oblique shocks were gene rated with a planar shock generator canted at angles of 10, 12, and 15 deg relative to the freestream. Shock-impingement points were varied to create impingement points upstream, in the vicinity, and downstream of an expansion corner with an angle that was similar in magnitude to the shock generator, Wall static pressure and heat transfer were meas ured in the region of the shock interaction to determine the effects o f the expansion corner on the character of the shock wave/boundary-lay er interaction. Detailed data have been generated for comparison with computational codes and to enable a better understanding of hypersonic inlet design.