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首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >PIV through moving shocks with refracting curvature
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PIV through moving shocks with refracting curvature

机译：通过具有折射曲率的移动冲击进行的PIV

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摘要

Particle image velocimetry (PIV) is applied to moving millimeter shock waves whose density jump and small radii of curvature make refraction significant. The motion of the shock front is also much larger than the motion of the corresponding mass at the front. A Lagrangian model of particle displacement in response to a moving shock is developed to investigate the relationship between particle displacements and the actual mass velocity behind the shock. Errors in PIV measurements due to light refraction across a curved, moving shock are investigated in terms of both position and velocity errors using a refraction model developed from geometrical optics. The model is experimentally validated and applied to 1-D slices of data extracted from PIV vector fields, and the resulting measurement errors are quantified.
机译：粒子图像测速技术（PIV）用于移动的毫米波冲击波，其密度跳跃和较小的曲率半径使折射显着。冲击前部的运动也远大于相应质量在前部的运动。建立了拉格朗日质点位移对运动冲击的响应模型，以研究质点位移与冲击后实际质量速度之间的关系。使用从几何光学系统开发的折射模型，根据位置误差和速度误差，研究了由于光在弯曲的运动冲击中的折射而导致的PIV测量误差。该模型经过实验验证，并应用于从PIV矢量场提取的一维数据切片，并对得到的测量误差进行了量化。

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