Narrow rectangular channel full-field transient cavitation share measurement system and method

Abstract

The invention discloses a narrow rectangular channel full-field transient cavitation share measurement system and method. The system comprises a detector module, a transmitting circuit, a receiving circuit and a calculation and analysis module; the detector module comprises an electrode plate array and an electric signal receiving bottom plate, the electrode plate array is arranged on the inner wall surface of an upper flow channel plate, and the lower runner plate is used as an electric signal receiving bottom plate; a voltage signal is provided for each electrode plate of the electrode platearray in sequence through the transmitting circuit, and current generated after the electrode plates are excited passes through a two-phase flow fluid medium between the electrode plates and the electric signal receiving bottom plate and then is transmitted back to the receiving circuit through the electric signal receiving bottom plate. The calculation and analysis module calculates the conductivity of the medium at the corresponding electrode slice according to the magnitude of the current signals received by the receiving circuit according to the time sequence, and calculates the phase state of the medium at the electrode slice. The system is high in measurement precision, the problem that a rectangular channel is narrow in structure is solved through the unique detector module design,and full-field transient cavitation share measurement in the rectangular channel is achieved.

Description

technical field [0001] The invention relates to the technical field of experimental research on thermal-hydraulic problems in narrow rectangular heat exchange channels in nuclear energy systems, and in particular to a system and method for measuring transient cavitation fractions in a narrow rectangular channel throughout the field. Background technique [0002] Boiling heat transfer is a common phenomenon in the operation of nuclear energy systems. Knowing the change law of its void fraction plays an important role in further studying its heat transfer mechanism and optimizing heat transfer performance. In recent years, narrow rectangular channel heat exchange equipment has been applied, and more and more attention has been paid to the research on its boiling heat transfer mechanism. However, limited by its narrow flow space, it is difficult to measure the void fraction in the channel. [0003] The traditional probe method is a single-point measurement, which can only obta...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the full-field cavitation fraction measurement method in the operation process of the existing nuclear energy system is not accurate enough to identify the gas-liquid phase, and the process is relatively complicated; the present invention provides a narrow rectangular The system and method for measuring the transient cavitation fraction in the whole field of the channel, the present invention can realize the real-time and accurate measurement of the transient cavitation fraction in the narrow rectangular channel in the whole field, and provide experimental data support for further research on boiling heat transfer in the narrow rectangular channel

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