擬似衝撃波内の乱れ特性のLDV測定

概要

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Turbulence characteristics of a supersonic turbulent boundary layer with multiple shock wave (λ-type pseudo-shock wave) in a square duct were investigated using a two-component LDV. The free-stream Mach number, flow confinement and Reynolds number upstream of the first-shock wave were of M_∞=1.78, δ_∞/h=0.3 and Re=13×10^6 m^<-1>, respectively. It was found that the distributions of the turbulence intesity and Reynolds stress in the boundary-layer with multiple shock wave were different from those of the shock wave-free case. The turbulence intensity increased with decreasing streamwise velocity due to each shock wave in the pseudo-shock wave. Furthermore, the effects of shock wave/turbulent boundary layer interaction on the turbulence characteristics of compressible turbulent boundary layer were clarified quantitatively.
1995-06-25