Manufacture method of four-probe conducting probe and application of conducting probe to measurement on two-phase flow parameters

Abstract

The invention discloses a manufacture method of a four-probe conducting probe and application of the conducting probe to measurement on two-phase flow parameters. The manufacture method comprises the following steps: processing single-probe probes and detecting conductivity; processing and winding copper wires; insulating the single-probe probes; assembling the four single-probe probes into a location hole plate; assembling the four single-probe probes into a sleeve; injecting insulation paint into the sleeve; fixedly sealing the sleeve with epoxy resin; grinding points of the probes; and connecting rear-end circuits. The application comprises the following steps: inserting the conducting probe into the center of a pipeline to serve as an electrode, connecting a direct-current power supply with the electrode and another electrode, namely the inner wall of the metal pipeline, through a resistor, acquiring data to extract and analyze phase change signals on the conducting probe, and measuring and calculating area concentration, void fraction and interface speed of a two-phase flow local interface. The method is capable of measuring the void fraction and the interface area concentration in two-phase flow, thereby measuring forward interfaces and backward interfaces and providing reference for deeply knowing local characteristics of two-phase flowing and completing a two-fluid model.

Description

technical field [0001] The present invention relates to the measurement of local parameters of gas-liquid two-phase flow, more specifically, a method for making a four-probe conductance probe for measuring local parameters of gas-liquid two-phase flow and its application in a two-phase flow parameter measuring device . Background technique [0002] The phenomenon of gas-liquid two-phase flow widely exists in nuclear power, chemical industry, petroleum transportation and other fields. For two-phase flow systems, void fraction and interfacial area concentration (IAC) are the two most critical parameters. IAC represents the area of ​​the interface in the two-phase flow per unit volume, which characterizes the effective area for mass, momentum and energy transfer between phases, and is also an important parameter for constructing the two-fluid model. [0003] Based on the principle of the four-headed probe detecting IAC, by assuming that the angle between the bubble surface ve...

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Problems solved by technology

[0005] Aiming at the technical problems existing in the above-mentioned prior art, the present invention provides a method for manufacturing a four-probe conductivity probe and its application in the measurement of two-phase flow parameters, which can measure the cavitation fraction in the two-phase flow in the vertical riser. and the interface area concentration are measured, not only can solve the forward interface (that is, the interface touches the probe first), but also can measure the receding interface, which provides a reference for in-depth understanding of the local characteristics of the two-phase flow and the improvement of the two-fluid model

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