单丝热线速度和方向特性的校准方法

The methods of the calibration of single hot wire in the velocity and directional sensitivity

对单丝热线用于测量三维紊流场时热线的速度校准和方向特性校准的方法进行了研究，提出了一种热线方向特性的校准方法．通过对热线探针顺流和横流安置时热线风速仪输出响应的分析比较。

The methods of velocity and directional sensitivity calibration of single hot wire are studied as they are used in 3 D turbulence flow field. A method of directional sensitivity calibration is put forward. The equation and program flow chart are given. The output response of hot wire anemometer is analyzed while single hot wire probe is placed in end flow and in cross flow. It is taken a conclusion that the methods of velocity calibration are chosen according to the direction of hot wire probe placed in flow field.