Experimental Determination of the Volume Concentration of the Gas Phase in Gas-Liquid Flow
V. N. Mamonov, A. F. Serov
Kutateladze Institute of Thermophysics, Siberian Branch Russian Academy of Sciences, Novosibirsk, 630090, Russia
Keywords: gas-liquid flow, volumetric concentration of gas phase, ultrasonic flow meter, flow transparency coefficient for ultrasonic pulses
Abstract
A method is proposed for determining the volume concentration of the gas phase in gas-liquid flow using an ultrasonic flow meter. The method is based on the experimental determination of the transparency coefficient of the gas-liquid flow to the ultrasonic pulses used in the flow meter to measure the flow rate. The transparency coefficient is determined as the ratio of the number of reliable ultrasonic pulses to the number of emitted pulses, and it is shown that due to the scattering of probing pulses, the presence of the phase in the form of gas bubbles leads to a decrease in the transparency coefficient. The ultrasonic flow meter was calibrated in air-water flow at volumetric air concentrations in the flow of 0-19%. The results show that the proposed method can be used to measure the volumetric concentration of the gas phase in gas-liquid flow up to values of the order of 30%.
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