V形反射式双声道超声波流量计湿气测量特性

Wet gas performance of two-path V turn reflection ultrasonic flow meter

引言 湿气通常是指气相为连续相,液相为离散相的气液两相流,主要存在于石油天然气工业的勘探开发与生产过程当中,美国机械工程师学会（Amer-ican Society of Mechanical Engineering,ASME）将其界定为Lockhart-Martinelli参数（即L-M参数）小于0.3的气液两相流。

In order to investigate the wet gas performance of ultrasonic flow meter,the wet gas flow characteristics were taken into account and the experiment was carried out with a two-path V turn reflection ultrasonic flow meter.The test result showed that the wet gas over-reading of ultrasonic flow meter was dependent on the L-M parameter.Liquid hold up and depth of liquid at the pipe bottom were the leading factors that affected the over-reading of ultrasonic flow meter with reflection sonar path.Consideration was given to liquid hold up,and a theoretical wet gas correlation of ultrasonic flow meter was deduced,the gas flow rates could be predicted within ±3% error under the flow condition when the L-M parameter was less than 0.1.This research work is useful for developing wet gas flow meter based on ultrasonic technology.