In practice, two-phase fluids may be often mixed or separated in T-junction tube, and alternating flow of liquid plug and gas plug may cause its working condition to be complex and changeable, so the study on it needs to be improved at present. Based on air and water, the characteristics of response to differential pressure of gas-liquid two-phase slug flow in two kinds of transparent horizontal T-junction PMMA tubes with different diameters are studied in depth and systematically, and data collection and processing are conducted by LabVIEW platform to obtain the probability density function (PDF) and the power spectral density function (PSD) characteristics of slug flow in different periods and forms. All characteristics provide reliable slug flow identification for flow pattern recognition.
Deng et al. (Sun,) studied this question.
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