五孔球探针旋转流场测量的应用方法与误差探讨

介绍五孔球探针的基本结构和使用方法。通过深入探讨气体绕流球体的的原理,分析了在调节探针方位确定气流方向时出现多个平衡点的原因,并进行实验验证,提出在复杂流场中确定正确的气流方向角的三个基本判据。从压力测量、探针位置精度、速度梯度和静压梯度等方面分析了流场测量误差的来源,并指出了实现误差控制的相应措施。

The Introduction of Five-Hole Probe in Measurement of Swirling Flow Field and the Error Discussion

The main structure and the using method of five-hole probe was introduced. Three criterions in confirmation to the correct angle of the flow deflexion were found through an experiment and analysis of the reasons for the multi balance angles in the confirmation to the flow deflexion angle. The sources of the measuring errors in the swirling flow field were analyzed from the pressure measurement, the position of the probe, the velocity gradient and the pressure gradient. Corresponding methods in error reduction were presented.