在测量紊流参数时分离速度脉动与温度脉动的方法

本文采用双热线法分离在高温紊流中同时出现的温度脉动与速度脉动信号.文中推导了用等温热线测量紊流脉动时灵敏度方程的系数方程.并与恒流热线的温度脉动灵敏度方程结合,剔除温度脉动信号,从而确定紊流的速度脉动与主要紊流参数,提高了测量精度.

Separating Method of Velocity Fluctuation and Temperature Fluctuation during Measuring Turbulent Parameter

Dual hot wires were used to separate the simultaneous signals due to temperature fluctuation and velocity fluctuation appearing in high tempera tureturbulence measurements. The coefficients in the sensitivity equation inmeasuring turbulent fluctuation with constant-temperature hot-wire anemometry were deducted, combined with the temperature fluctuation sensitivity equation of constant-current hot-wire anemometry, thus separating the temperature-fluctuation component from the mixed signal, and leading to more accurate determination of the turbulent velocity fluctuation signal and other main turbulence parameters.