Visualization experiment system and method for two-layer fluid turbulence process and heat transfer characteristics under ocean conditions

Abstract

The invention discloses a visualized experimental system and method for mixing process of two layers of fluids and heat transfer characteristics under ocean conditions. The system comprises a visualized experimental section, an ocean motion platform for simulating ocean motion conditions, a high-speed camera for photographing the mixing process of two layers of fluids, a high-level liquid storagetank for storing an experimental working medium, a waste liquid tank connected with the visualized experimental section, a cooling water circuit, power distribution equipment, instrument control equipment and data measuring and collecting equipment. During the experiment, the experimental working medium is injected to the visualized experimental section, the ocean motion platform drives the visualized experimental section to realize motions such as undulation, sway and the like; and the water in the cooling water tank is driven by a centrifugal water pump to flow through a cooling passage in the visualized experimental section so as to provide a cooling boundary for the visualized experimental section, and the heated cooling water returns to the initial temperature through a plate heat exchanger and a cooling tower return and then is returned to the cooling water tank. The system and method are capable of obtaining the mixing process and heat transfer characteristics of two layers of molten pools after serious accidents of reactors under the ocean conditions, and can be used for safe design of reactors under the ocean condition.

Description

technical field [0001] The invention relates to the technical field of research on the turbulence characteristics of the layered melting pool of the lower head of the pressure vessel after a severe accident of a nuclear power plant under marine conditions, and specifically relates to a two-layer fluid turbulence process and a heat transfer characteristic visualization experiment system and method under marine conditions. Background technique [0002] When a serious accident occurs in a nuclear power plant pressurized water reactor, if the core cannot be effectively cooled, the temperature will rise rapidly, causing a large number of fuel assemblies and structural materials to melt and migrate to the bottom of the pressure vessel, and the high-temperature melt entering the lower head will gradually accumulate A debris bed or molten pool forms. In the middle and late stages of the formation of the molten pool, a large amount of molten internal components and pressure vessel st...

AI Technical Summary

Problems solved by technology

In this invention, because a partition is set between the two layers of fluid, the mixing characteristics between the two layers cannot be studied, and the influence of ocean conditions on the mixing effect and heat transfer characteristics of the two layers of molten pools cannot be considered, and the experimental process cannot be visualized.

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