Method for establishing liquid curved membrane flow system of fusion reactor divertor flow stability

Abstract

The invention relates to the technical field of liquid membrane flow control, and specifically relates to a method for establishing a liquid curved membrane flow system of fusion reactor divertor flow stability. The method comprises the following steps: step one, finding a relationship between a local magnetic field strength and an inclination angle under stable flow status of a liquid metal membrane, changing local inclination angles at different flow distances of the membrane flow to adapt variations of a gradient magnetic field, controlling a magnetofluid instability caused by a strong gradient magnetic field, i.e., utilizing the shape of a curved bottom wall to adapt the variations of the strong gradient magnetic field; step two, utilizing a method of fixing a metal screen above the curved bottom wall to ensure the liquid metal to flow along the curved bottom wall having a greater curvature variation; and step three, obtaining a stable membrane flow on the metal screen by regulating the sizes of metal meshes at different flow distances as well as regulating the distance between the metal screen and the curved bottom wall. By the method for establishing the liquid curved membrane flow system of the fusion reactor divertor flow stability, the instability of the magnetofluid of the liquid metal membrane flow under the strong gradient magnetic field environment having greater magnetic field strength variations is solved.

Description

technical field [0001] The invention belongs to the technical field of liquid film flow control, and in particular relates to a method for establishing a liquid curved film flow system for the flow stability of a divertor of a fusion reactor. Background technique [0002] At present, controlled nuclear fusion still faces the huge technical challenge of developing suitable plasma-facing materials. So far, researchers have not found a solid material that can withstand the extremely high heat flow impact of the fusion reactor and the very large neutron radiation damage. . Therefore, flowing liquid metal lithium is proposed as a fusion reactor facing the plasma material, and used as the surface of the high thermal load components (especially the divertor) of the fusion reactor to withstand extremely high heat flow impact and reduce neutron radiation damage. Existing research results show that solid high thermal load materials can only withstand up to 10MW / m under steady state c...

AI Technical Summary

Problems solved by technology

Usually the Lorentz force hinders the forward flow of the film flow, so the magnetic fluid instability in the process of film flow will occur, usually manifested in the blockage of the film flow, the accumulation becomes thicker or even the flow is blocked, and the film flow is pushed to the groove One side of the bottom wall cannot be completely covered or even developed into a stream flow, droplet sputtering caused by the instability of the liquid metal surface, etc. All the above phenomena have been experimentally confirmed, but so far researchers have not yet investigated the magnetic fluid. Conduct in-depth and systematic research on the instability and propose a method to effectively control the flow of film flow in the fusion reactor strong magnetic field environment

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