基于FFT相位判别的旋进旋涡流量计抗流体脉动干扰方法

A Method for Removal of Fluid Pulsating Interference on Swirlmeter Based on Spectrum Phase Discrimination Using FFT

提出了利用 FFT相位判别来消除流场脉动干扰对旋进旋涡流量计测量影响的方法。研究了流体脉动对旋进旋涡流量计旋进旋涡效应特性的影响。在流量计实验装置上对 5 0 m m口径旋进旋涡流量计进行了实验研究。实验表明 :流体脉动干扰压力与旋进旋涡效应的脉动压力间存在线性迭加关系以及流场脉动干扰使旋进旋涡流量计传感器输出产生主频移动现象。数值实验表明了本方法的有效性。

A spectrum phase discrimination method based on FFT to remove the effect of fluid pulsating interference on swirlmeter was proposed. The effect of fluid pulsating interference on dynamic characteristics of swirlmeter was investigated.A ψ 50mm prototype swirlmeter was developed for the experiment instrument designed.Major findings in experiment are described as follows: First, the correlation between the velocity pressures of fluid disturb wave and velocity pressure of vortex procession in swirlmeter is linear correlation. Second,fluid disturbs lead to main frequency shift phenomena in the swirlmeter measure. A numerical example demonstrated the high efficiency of the method.