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A full-field transient cavitation fraction measurement system and method for a narrow rectangular channel

A rectangular channel and measurement system technology, which is applied in measurement devices, fluid resistance measurement, material analysis by electromagnetic means, etc., can solve the problems of inaccurate gas-liquid phase identification and complicated processes, and achieve the effect of accurate measurement and simple structure.

Active Publication Date: 2022-04-15
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • A full-field transient cavitation fraction measurement system and method for a narrow rectangular channel
  • A full-field transient cavitation fraction measurement system and method for a narrow rectangular channel
  • A full-field transient cavitation fraction measurement system and method for a narrow rectangular channel

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Embodiment 1

[0040] Such as figure 1 As shown, the present invention is a narrow rectangular channel full-field transient cavitation fraction measurement system, including a detector module and a circuit control module, the detector module is arranged in the narrow rectangular channel, and the narrow rectangular channel is formed by the Rectangular flow channel composed of plate 3 and lower channel plate; the detector module includes an electrode sheet array 1 and an electrical signal receiving base plate 2, and the electrode sheet array 1 is tightly attached to the upper channel plate 3 of the narrow rectangular channel On the wall, the lower runner plate of the narrow rectangular channel is used as the electric signal receiving bottom plate 2, and is made of metal;

[0041] The circuit control module includes a transmitting circuit 5 and a receiving circuit 6, the transmitting circuit 5 is electrically connected to the electrode sheet array 1, and the receiving circuit 6 is electrically ...

Embodiment 2

[0059] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment provides a method for measuring the transient cavitation fraction of a narrow rectangular channel in a full field. State void fraction measuring system, the method comprises the following steps:

[0060] S1: Install the detector module, the circuit control module and the flow channel into the measurement circuit of the two-phase flow fluid;

[0061] S2: Start the transmitting circuit, receiving circuit and calculation and analysis module;

[0062] S3: Start the measurement circuit of the two-phase flow fluid, so that the two-phase flow fluid enters the flow channel of the narrow rectangular channel;

[0063] S4: The transmitting circuit and receiving circuit are put into operation, the transmitting circuit continuously transmits voltage signals, and the corresponding simultaneous receiving circuit collects voltage signals; including:

[0064] The transmitting c...

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Abstract

The invention discloses a system and method for measuring transient cavitation fraction in a narrow rectangular channel. The system includes a detector module, a transmitting circuit, a receiving circuit and a calculation and analysis module. The detector module includes an electrode sheet array and an electric signal receiving base plate. , the electrode sheet array is set on the inner wall of the upper flow channel plate, and the lower flow channel plate is used as the electric signal receiving base plate; a voltage signal is given to each electrode sheet of the electrode sheet array in sequence through the transmitting circuit, and the current generated after the electrode sheet is excited passes through After the two-phase flow fluid medium between the electrode piece and the electric signal receiving base plate is sent back to the receiving circuit through the electric signal receiving base plate; the calculation and analysis module calculates the conductance of the medium at the corresponding electrode piece from the magnitude of the current signal received by the receiving circuit in time series Calculate the phase state of the medium at the electrode sheet. The invention has high measurement precision, solves the problem of narrow rectangular channel structure with a unique detector module design, and realizes the measurement of the transient cavity fraction in the whole field in the rectangular channel.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/07G01N27/06G01N27/04G01R27/22
CPCG01N27/07G01N27/06G01N27/04G01N27/045G01R27/22
Inventor 余诗墨闫晓龚随军张君毅赵大卫刘文兴昝元锋
Owner NUCLEAR POWER INSTITUTE OF CHINA
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