Precision and Errors Analysis of PIV Used for the Watertunnel Flow Field Displaying and Measuring System
PIV系统水洞流场测量准确度与误差分析

In order to improve the measuring accuracy,the limitations to the detecting precision of the PIV were discussed and the improve methods were given.The experiments were designed to measure the non-model and the ball model flow fields in the watertunnel.The measuring accuracy of the non-model flow field with the flow speed of 6m/s was less than 1.3%.By comparing the theory value and the detecting results of the ball model flow fields,the accuracy of the majority area in the detecting domain was less than 2%,but in the ball boundary and the area beside the link was 6%~8%.In the end,the errors were analyzed for the system future improvement.