超音速ノズルにおける弱い垂直衝撃波と乱流境界層の干渉 : 第1報,時間的平均流れの特性

概要

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The interaction of weak normal shock wave with turbulent boundary layer in a supersonic nozzle was investigated experimentally by wall static pressure measurements and by schlieren optical observations. The time-mean flow in the interaction region was classified into four patterns according to the ratio of the pressure P_k at the first kink point in the pressure distribution of the interaction region to the pressure P_1 just upstream of the shock. It is shown for any flow pattern that the wall static pressure rise near the shock foot can be described by the "free interaction" which is defined by Chapman et al. The ratio of the triple point height h_t of the bifurcated shock to the undisturbed boundary layer thickness δ_1 upstream of the interaction increases with the upstream Mach number M_1, and for a fixed M_1, the normalized triple point height h_t/δ_1 decreases with increasing δ_1/h, where h is the duct half-height.
一般社団法人日本機械学会の論文
1995-01-25