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%.
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