PIV测速技术实验参数分析

Analysis of Experiment Parameters in PIV

本文通过理论分析、计算机模拟及实验观测，对采用底片记录和杨氏条纹法判读的ＰＩＶ测速技术的动态测量范围、各种实验参数的影响及其优化取值准则进行了详细的分析讨论，并给出了一些有关的理论及经验公式。

The dynamic measurement rangs,the influence and the optimization of the experimental parameters in PIV(Particle Image Vel- ocimetry)are discussed in detail by means of experimental measurement,theoretic analysis and computer simulation. The lower and upper limits of the measurement range in PIV are given,which are related to particle image diameter and secondary speckle noise in Young's fringes separately. The optimized value of the parameters,such as the number of particle image pairs within intcrrogation spot,time interval between two exposures, exposure pulsed duration,exposure times,exposure intensity,et al.,are presented.These results may be helpful to PIV measurement.