PIV系统测量误差的实验评价方法以及实验参数的优化

An experimental method for evaluating the PIV measurement error and its application in optimizing PIV experiment parameters

提出了一种PIV(ParticleImageVelocimetry)测量误差的实验评价方法:利用匀速转动圆盘上粒子的反射光模拟流场中示踪粒子散射光解决基准速度场。建立了一套二维PIV系统的测量误差评价系统,利用该系统对PIV测量误差和测量精度进行了实验评价,得到了结果误差在空间及时间上的概率分布特性,并对两个关键PIV实验参数进行了优化。实验表明该误差评价方法装置简单,方法可靠,可方便灵活地对PIV系统测量误差和测量精度进行实验评价和参数优化研究。

This paper presents an experimental method to evaluate the error of measurement results by means of Particle Image Velocimetry (PIV). The error analysis under evaluation includes the results' system error, measurement precision expressed by standard error, and the random error's statistical characters. Thus, two experimental parameters significant for the PIV performances are optimized. Results show that the experimental method is reliable and the evaluation system is easy to construct.