衝撃波を伴う超音速内部流動に関する研究 : マッハ4擬似衝撃波の内部構造に関する実験的研究(流体工学,流体機械)

摘要: This paper describes an experimental study on the internal structure of Mach 4 pseudo-shock wave (PSW) in a straight square duct with cross section 80×80 mm2, using new supersonic wind tunnel Muroran Institute Technology. The free stream number, unit Reynolds and flow-confinement just upstream PSW were M∞=3.98, Re=2.6×107 m-1, δ∞/h=0.39, respectively, where δ∞ is boundary layer thickness, h half height duct. development characteristics turbulent top bottom walls was investigated by LDV measurements. clarified color schlieren photographs Particle Image Velocimetry (PIV) It reveals that or wall separates large after first oblique shock PSW, flow becomes asymmetric flow.