Small-passage gas-liquid phase flow pattern identification device and method based on photovoltaic array sensor

Abstract

The invention discloses a small-passage gas-liquid phase flow pattern identification device and method based on a photovoltaic array sensor. The small-passage gas-liquid phase flow pattern identification device comprises a transparent pipe with a small diameter, a laser source, a beam splitter prism, an optical power meter, a beam expander, a slit, the photovoltaic array sensor, an amplifying and filtering circuit, a data acquisition module and a microcomputer. The measurement signal for reflecting the gas-liquid phase flow pattern change is obtained by the photovoltaic array sensor, the characteristic value matrix of the measurement signal is extracted as original data, the original data are compressed by a principal component analysis method, the compressed data matrix is input into a flow type classifier of a support vector machine, thus the two-phase flow pattern is identified. An effective path is provided to analyze the small-passage gas-liquid phase flow character and detect the parameters. The corresponding device has the advantages of simple structure, low cost, non contact measurement, high identification correct rate and wide application range, and provides useful reference for identifying the small-passage two-phase flow pattern.

Description

technical field [0001] The invention relates to the field of multiphase flow measurement, in particular to a small channel gas-liquid two-phase flow pattern identification device and method based on a photocell array sensor. Background technique [0002] Two-phase flow widely exists in chemical industry, metallurgy, energy and other industrial sectors. Different two-phase flow patterns are of great significance to the operation mode, operation reliability and quality cost control of the production process. Therefore, for two-phase flow Type research and analysis has always been a very important and widely researched topic. In recent years, with the rapid development of small industrial equipment, the research on small channel two-phase flow has become one of the research hotspots in the field of two-phase flow research. The characteristic of small-channel two-phase flow is that, limited by the smaller hydraulic diameter of small-diameter pipes, the pipe area / volume ratio in...

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Problems solved by technology

The characteristic of small-channel two-phase flow is that, limited by the smaller hydraulic diameter of small-diameter pipes, the pipe area / volume ratio increases. Due to surface tension and other reasons, the flow characteristics of small-channel two-phase flow are different from those of conventional pipe diameters. , resulting in many common detection methods in conventional fields not being able to adapt to the detection of relevant parameters of small channel two-phase flow

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