Experimental device and method for liquid metal two-phase flow parameter measurement

Abstract

The invention discloses an experimental device and method for liquid metal two-phase flow parameter measurement. The experimental device comprises a liquid metal storage tank, a gas distributor, a bubbling pool, a conducting probe system, a differential pressure gauge and a plurality of valve pipe fittings. A gas phase provided by a gas source is injected into the liquid metal in the bubbling pool through a gas distributor at the bottom of the bubbling pool to form a two-phase system, and then the average void fraction and the local time-average void fraction of the two-phase system are measured through a differential pressure gauge and a conducting probe respectively, and then the gas phase emitted from the two-phase system is purified by a gas filter and then is exhausted to the atmosphere by an exhaust valve; the device is specifically used for measuring average void fraction, void fraction radial distribution and drift parameters in a liquid metal two-phase flow system under different gas phase apparent velocities. Therefore, support of experimental data is provided for developing and verifying a two-phase flow calculation model suitable for liquid metal; and meanwhile, the device can be used for repeatedly carrying out experiments, so that the reliability of experimental results is enhanced.

Description

technical field [0001] The invention belongs to the field of experimental research on the characteristics of two-phase flow of liquid metal, and in particular relates to an experimental device and method for measuring parameters of two-phase flow of liquid metal. Background technique [0002] Since the last century, liquid metal cooled reactors have been recognized as one of the most promising reactor types in the fourth generation reactors due to their inherent safety, high thermal efficiency, and unique advantages in nuclear fuel multiplication 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 liquid metal two-phase flow widely exists in the safety analysis of liquid metal cooled reactors, such as steam generator heat transfer tube rupture accidents, fuel cladding damage leading to fission gas release acciden...

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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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