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首页> 外文期刊>Journal of visualization >High-speed imaging of shock wave focusing in concave profiles using shearing interferometry and direction-indicating colour schlieren
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High-speed imaging of shock wave focusing in concave profiles using shearing interferometry and direction-indicating colour schlieren

机译:利用剪切干涉法和方向指示色纹对凹形轮廓中的冲击波聚焦进行高速成像

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摘要

In this study both qualitative and quantitative flow visualization techniques are used to examine the complex flow field developed during the interaction of a plane shock wave with a compound profile. Shearing interferometry and direction-indicating colour schlieren are implemented in conjunction with highspeed time-resolved imaging. Comparisons between the results provided by the two flow visualization systems are made at incident shock strengths of Mach 1.28 and Mach 1.35. The results from both systems indicate the complex nature of the transient compression and expansion systems developed during the interaction behind the various shock fronts. The direction-indicating results prove valuable in eliminating the ambiguity with respect to the sign of the high-order fringes found in the shearing interferometry results.
机译:在这项研究中,定性和定量流动可视化技术均用于检查平面冲击波与复合轮廓相互作用期间形成的复杂流场。剪切干涉测量法和方向指示色纹片与高速时间分辨成像结合使用。两种流动可视化系统提供的结果之间的比较是在1.28马赫和1.35马赫的入射冲击强度下进行的。这两个系统的结果表明,在各种冲击前沿之间的相互作用期间开发的瞬态压缩和膨胀系统的复杂性质。方向指示结果被证明对于消除关于在剪切干涉测量结果中发现的高阶条纹的符号的歧义是有价值的。

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