Gas-liquid two-phase flow pattern recognition method and detection device

A gas-liquid two-phase flow and flow pattern recognition technology, which is applied to measuring devices, fluid dynamics tests, and machine/structural component testing, can solve problems such as unrealized flow pattern recognition of gas-liquid two-phase flows

Active Publication Date: 2017-11-28
CENT SOUTH UNIV
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Problems solved by technology

[0003] The phenomenon of fluid flow around life and various industrial equipment often occurs, such as wind and water flowing around bridges and bridge piers in bridge engineering. The existing research has not yet realized the flow pattern identification of gas-liquid two-phase flow around the flow. , so it is necessary to provide a way to realize flow pattern identification of gas-liquid two-phase flow

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  • Gas-liquid two-phase flow pattern recognition method and detection device
  • Gas-liquid two-phase flow pattern recognition method and detection device
  • Gas-liquid two-phase flow pattern recognition method and detection device

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Embodiment Construction

[0075] The present invention will be further described below in combination with specific embodiments.

[0076] The invention provides a gas-liquid two-phase flow pattern recognition method based on the time-frequency entropy of the pressure fluctuation of the blunt body wake, specifically using the adaptive lumped empirical mode decomposition (Ensemble Empirical Mode Decomposition, EEMD) and Hilbert (Hilbert ) transformation to process the measured differential pressure signal to obtain the time-frequency distribution of the signal energy, based on which the time-frequency entropy is calculated, and then combined with the characteristic parameters of the gas-liquid two-phase flow and the flow pattern of the gas-liquid two-phase flow to obtain a suitable The horizontal and vertical coordinates of the flow pattern diagram are constructed, so that after collecting the differential pressure signal of the gas-liquid two-phase flow to be measured, the flow pattern of the gas-liquid ...

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Abstract

The invention discloses a gas-liquid two-phase flow pattern recognition method and a detection device. The method comprises the following steps that: step 1, measurement data are obtained; step 2, the pressure difference signals of each group of measurement data in the step 1 are processed, so that the time-frequency entropy of the pressure difference signals can be obtained, and a flow pattern map is constructed according to the gas-liquid two-phase flow pattern of each group of measurement data, the time-frequency entropy and the characteristic parameters of gas-liquid two-phase flow; step 3, pressure difference signals to be measured are obtained, and the coordinate position of the pressure difference signals to be measured in the flow pattern map is calculated; and step 4, the flow pattern of the gas-liquid two-phase flow to be measured is identified according to the coordinate position of the pressure difference signals to be measured. The method realizes the identification of the flow pattern of the gas-liquid two-phase flow and can improve the reliability of identification results.

Description

technical field [0001] The invention relates to gas-liquid two-phase flow measurement technology, in particular to a gas-liquid two-phase flow pattern identification method and detection device. Background technique [0002] Gas-liquid two-phase flow generally occurs in various industrial processes and equipment such as chemical industry, metallurgy, and energy. The flow pattern represents the form or structure of fluid flow. The change of flow pattern and its characteristics greatly affect the two Flow characteristics and heat and mass transfer performance of phase flow. At the same time, the flow pattern is also the basis for accurate measurement of other flow parameters. Therefore, the identification of two-phase flow patterns has important scientific significance. [0003] The phenomenon of fluid flow around life and various industrial equipment often occurs, such as wind and water flowing around bridges and bridge piers in bridge engineering. The existing research has...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 孙志强陈露阳黄思师
Owner CENT SOUTH UNIV
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