The instantaneous planar velocity measurements can be conducted by using of PIV, and this make it become an attractive technique for using in the study of the complex flow fields.

• 数字式PIV技术可以在瞬间记录下整个测量断面内的信息,从而为解决水泵转轮内非定常流动的难题奠定了良好的基础,代表着水力机械内部复杂流动测试技术的方向。