Abstract

A method is proposed for determining the volume concentration of the gas phase in gas–liquid flow using an ultrasonic flowmeter. The method is based on the experimental determination of the transparency coefficient of gas–liquid flow to the ultrasonic pulses used in the flowmeter to measure the flow velocity. The transparency coefficient is determined as the ratio of the number of reliably received ultrasonic pulses to the number of emitted pulses, and it is shown that due to the scattering of probing pulses, the presence of the gas bubble phase leads to a decrease in the transparency coefficient. The ultrasonic flowmeter was calibrated in air–water flow with an air volume concentrations of 0–19%. The results show that the proposed method can be used to measure the volume concentration of the gas phase in gas–liquid flow up to values of the order of 30%.

中文翻译：

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实验测定气液两相中的气态体积浓度

摘要

提出了一种使用超声波流量计确定气液流中气相体积浓度的方法。该方法基于实验确定的气液流对流量计中使用的超声脉冲的透明系数的测量速度。透明系数被确定为可靠接收的超声波脉冲数与发射脉冲数之比，并且显示出由于探测脉冲的散射，气泡相的存在导致透明度降低。系数。超声流量计在空气-水流中进行校准，空气体积浓度为0-19％。