Study on Internal Supersonic Flows with Pseudo-shock Wave Using Liquid Crystal Flow Visualization Method 被引量：2

液晶流动可视化方法研究拟似冲击波的内部超声速流动(英文)

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摘要 The flow visualization technique using shear-sensitive liquid crystal is applied to the investigation of a Mach 2 internal supersonic flow with pseudo-shock wave （PSW） in a pressure-vacuum supersonic wind tunnel. It provides qualitative information mainly concerning the overall flow structure, such as the turbulent boundary layer separation, reattachment locations and the dimensionalities of the flow. Besides, it can also give understanding of the surface streamlines, vortices in separation region and the corner effect of duct flow. Two kinds of crystals with different viscosities are used in experiments to analyze the viscosity effect. Results are compared with schlieren picture, confirming the effectiveness of liquid crystal in flow-visualization. The flow visualization technique using shear-sensitive liquid crystal is applied to the investigation of a Mach 2 internal supersonic flow with pseudo-shock wave （PSW） in a pressure-vacuum supersonic wind tunnel. It provides qualitative information mainly concerning the overall flow structure, such as the turbulent boundary layer separation, reattachment locations and the dimensionalities of the flow. Besides, it can also give understanding of the surface streamlines, vortices in separation region and the corner effect of duct flow. Two kinds of crystals with different viscosities are used in experiments to analyze the viscosity effect. Results are compared with schlieren picture, confirming the effectiveness of liquid crystal in flow-visualization.

作者王东屏兆文忠杉山弘东条启

机构地区 College of Mechanical Engineering Department of Mechanical Systems Engineering Department of Mechanical Systems Engineering

出处《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2005年第2期102-107,共6页 中国航空学报（英文版）

基金 NationalHigh TechR&DProgramforCIMSofChina(2002AA411320)

关键词 surface flow visualization turbulent boundary layer separation pseudo-shock-wave shock wave/turbulent boundary layer interaction shear-sensitive liquid crystal comer effect surface flow visualization turbulent boundary layer separation pseudo-shock-wave shock wave/turbulent boundary layer interaction shear-sensitive liquid crystal comer effect

分类号 V211.73 [航空宇航科学与技术—航空宇航推进理论与工程]

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