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粒子图象测速技术（ParticleImageVelocimetry）是当今国际上流体力学领域正在发展中的一门新的测试技术。本文介绍了利用CSSRC建成的PIV系统在小循环水槽中进行叶栅绕流流态显示及流场测量的试验。文中给出一些典型的叶栅绕流的粒子图象和通过自相关法计算得到的速度矢量图。结果表明，CSSRC的PIV系统已能用于流场的显示和测量；并不失为一种流动测量的先进工具。
Particle Image Velocimetry (Particle Image Velocimetry) is a new test technique that is developing in the field of fluid mechanics in the world at present. This paper introduces the PIV system using CSSRC built in a small circulation tank flow around the cascade fluid flow display and flow test. In this paper, some typical particle images of flow around cascades and velocity vectors calculated by autocorrelation are given. The results show that CSSRC’s PIV system has been used for the display and measurement of flow fields and is an advanced tool for flow measurement.