摘要
近年来用Ｘ型热线探头旋转法测量低湍流度的三维流场的报导较多，但是对它的使用范围以及测量精度论及的很少。热线探头和其它的气动探针一样，有自己最佳的工作区限，超越了这个区限，测量数据就失去了可信的价值。本文在介绍测量方法的同时，校验了在不同来流方位下的测量误差。
In recent years a lot of papers about technique for measuring a 3-D low turbulent flow field by means of rotating a X-type hot-wire probe has been published.But only a few were concerned in the measurement precision of the incoming flow velocity at different angles ralative to the fixed sensors .Hot-wire probes, as well as other pneumatic probe,have their own validity range. Beyond this range the experimental data lose their significance of confidence. In this paper besides description of the technique for measuring 3-D flow field with rotating X-type hot-wire probe, a discussion on the errors arising in conditions of different directions of incoming flow to a fixed X-type hot-wire probe is presented.
