测量三维湍流场的热线响应方程及热线校正方程

 从Ｊｏｒｇｅｎｓｅｎ等效冷却速度公式出发推出了高阶精度的热线响应方程,它适用于密度不变低速条件下求解湍流场中时均速度和雷诺应力张量。应用该热线响应方程时不严格要求热线探头轴线与流场速度矢量完全一致,因此可简化热线测量的支撑和传动机构。导出的显式热线校正方程可保证校正精度。

HOT-WIRE RESPONSE EQUATION FOR THE MEASUREMENT OF 3-D TURBULENT FLOW FIELD AND HOT-WIRE CALIBRATION EQUATION

ased on Jorgenson's effective velocity formula a hot-wire response equation of the third order is derived,which is used to analyze the mean velocities as well as Reynolds stresses under the condition of low speed keeping constant density.The co-axis between the probe axis and measured velocity vector is not needed with this method,thus simplifying the traverse mech-anism. Most calibration equations are implicit functions of the velocity.In order to avoid solving an ultra-equation for the transfer of anemometer output into effective velocity,explicit hot-wire calibration equations are goven,which reduces computer time and still keeps the high precision.