Quantitative determination method and device for flow pattern of horizontal gas-liquid two-phase flow

Abstract

The invention discloses a quantitative determination method and a quantitative determination device for flow patterns of horizontal gas-liquid two-phase flows. The quantitative determination method comprises the steps of: acquiring two-phase flow liquid film thickness data in various flow patterns; carrying out signal processing analysis on the two-phase flow liquid film thickness data in various flow patterns according to a multiscale entropy (MSE) concept, so as to extract characteristics of different flow patterns; acquiring MSE arrangement distribution characteristic curves according to the extracted characteristics of different flow patterns, and calculating rates of MSE of different flow pattern curves of MSE arrangement distribution diagrams; and establishing a flow pattern database according to the two-phase flow liquid film thickness data in various flow patterns, the MSE arrangement distribution characteristic curves and the rates of MSE, so as to obtain a flow pattern identification quantitative determination form, and achieving the purpose of determination by means of the flow pattern identification quantitative determination form. The quantitative determination method can process two-phase flow liquid film thickness signals by adopting the MSE algorithm, achieve the purpose of flow pattern identification through extracting characteristic quantities, improve the applicability and reliability of determination, and improve the accuracy of determination.

Description

technical field [0001] The invention relates to the field of multiphase flow measurement technology and flow pattern identification technology, in particular to a method and device for quantitative determination of flow pattern of horizontal gas-liquid two-phase flow. Background technique [0002] Flow pattern is the basis of studying two-phase flow. Whether it is academic research or engineering application, distinguishing the flow pattern of two-phase flow is the most fundamental and core issue. The flow pattern is the distribution of the two-phase flow medium. The interface distribution of the two-phase flow presents different geometric shapes or flow structures. According to the Oshinowo flow pattern division principle, the flow pattern in the horizontal pipeline is divided into six types, namely bubble flow, plug flow flow, stratified flow, wavy flow, slug flow, annular flow. So far, the kinetic mechanism of two-phase flow regime transition has not been fully understoo...

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Existing scholars mostly use advanced signal processing technology to analyze and study the second selection objects such as pressure differ...

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