An experimental device and method for measuring liquid metal two-phase flow parameters

Abstract

The invention discloses an experimental device and method for measuring liquid metal two-phase flow parameters. The experimental device comprises a liquid metal storage tank, a gas distributor, a bubbling tank, a conductivity probe system, a differential pressure gauge and several valve pipe fittings ; The gas phase provided by the gas source is injected into the liquid metal in the bubbling tank through the gas distributor at the bottom of the bubbling tank to form a two-phase system, and then the average void fraction and local volume of the two-phase system are measured by differential pressure gauge and conductivity probe respectively. The time-averaged cavitation fraction, the gas phase emerging from the two-phase system is purified by the gas filter and then discharged to the atmosphere by the exhaust valve; the device is specifically used to measure the average air volume in the liquid metal two-phase flow system under different gas phase superficial flow rates Bubble fraction, radial distribution of cavitation fraction and drift parameters; provide experimental data support for the development and verification of two-phase flow calculation models suitable for liquid metals; at the same time, the device can be repeated many times to carry out experiments, which enhances the reliability of experimental results .

Description

technical field [0001] The invention belongs to the field of experimental research on liquid metal two-phase flow characteristics, in particular to an experimental device and method for measuring liquid metal two-phase flow parameters. Background technique [0002] Since the last century, liquid metal-cooled reactors have been recognized as one of the most promising types of fourth-generation reactors due to their inherent safety, high thermal efficiency, and unique advantages in nuclear fuel breeding and nuclear waste transmutation. With the deepening of the research and design of liquid metal cooled reactors, the safety assessment of liquid metal cooled reactors becomes more and more necessary. The phenomenon of two-phase flow of liquid metal widely exists in the safety analysis of liquid metal cooled reactors, such as the rupture of the heat transfer tube of the steam generator, the release of fission gas caused by the damage of the fuel cladding, and the entrainment of t...

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Problems solved by technology

Among the above methods, since most of them are carried out based on loop-type experimental devices, there are few studies on pool-type systems; loop-type experimental systems require more auxiliary support systems, and the cost of experiments is high; loop-type systems mostly start from the purpose of engineering verification experiments , so the mechanism is weak, which limits the research on the two-phase flow mechanism of liquid metal

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