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One of the main difficulties restricting the development of the fourth-generation lead-cooled fast reactor is the compatibility of structural materials with liquid lead-bismuth alloy. In addition to high-temperature liquid metal corrosion, the generated impurity particles will also cause erosion to valves and other components. Insoluble impurity particles will destroy the oxide film layer generated on the inner wall of the lead-bismuth pipeline, causing the film layer to fall off, aggravating corrosion, and having a great impact on the life and safety of the pipeline. Based on the discrete phase model (DPM), this paper models and numerically simulates the common ball valve fittings in the lead-bismuth circuit, analyzes the flow field and erosion area of solid particles mixed in the lead-bismuth fluid in the fittings, and compares the erosion and wear of particles on the Fe3O4 oxide film layer under different flow velocities, particle sizes, particle densities, and particle mass flow rates. Some results show that the flow of solid particles in liquid lead-bismuth fluid is greatly affected by buoyancy, and erosion is prone to occur in the upper part of the fittings and connecting pipelines; the erosion area of the film layer on the surface of the fittings changes with the change of flow characteristics, and the distribution of the erosion area is greatly affected by the particle size and flow rate. In the field of liquid lead-bismuth (LBE) research, there are few studies on the erosion of oxide films. This paper introduces the numerical simulation method based on the discrete phase model into the erosion of liquid lead-bismuth oxide films, providing a theoretical basis for subsequent research and experimental development. At the same time, this paper systematically studies the changing laws of the erosion of oxide films in liquid lead-bismuth based on different flow characteristics, providing a theoretical reference for the construction of the lead-bismuth circuit and the actual operation of the lead-cooled fast reactor.

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Numerical Simulation Research on the Erosion of Oxide Film Layers by Lead-Bismuth Local Flow Based on the DPM Model

  • 会议论文

  • 发表日期：

    2026年

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  • Gaoxiang Xu,
  • Wan Zhang,
  • Chengfang Xu

摘要

One of the main difficulties restricting the development of the fourth-generation lead-cooled fast reactor is the compatibility of structural materials with liquid lead-bismuth alloy. In addition to high-temperature liquid metal corrosion, the generated impurity particles will also cause erosion to valves and other components. Insoluble impurity particles will destroy the oxide film layer generated on the inner wall of the lead-bismuth pipeline, causing the film layer to fall off, aggravating corrosion, and having a great impact on the life and safety of the pipeline. Based on the discrete phase model (DPM), this paper models and numerically simulates the common ball valve fittings in the lead-bismuth circuit, analyzes the flow field and erosion area of solid particles mixed in the lead-bismuth fluid in the fittings, and compares the erosion and wear of particles on the Fe3O4 oxide film layer under different flow velocities, particle sizes, particle densities, and particle mass flow rates. Some results show that the flow of solid particles in liquid lead-bismuth fluid is greatly affected by buoyancy, and erosion is prone to occur in the upper part of the fittings and connecting pipelines; the erosion area of the film layer on the surface of the fittings changes with the change of flow characteristics, and the distribution of the erosion area is greatly affected by the particle size and flow rate. In the field of liquid lead-bismuth (LBE) research, there are few studies on the erosion of oxide films. This paper introduces the numerical simulation method based on the discrete phase model into the erosion of liquid lead-bismuth oxide films, providing a theoretical basis for subsequent research and experimental development. At the same time, this paper systematically studies the changing laws of the erosion of oxide films in liquid lead-bismuth based on different flow characteristics, providing a theoretical reference for the construction of the lead-bismuth circuit and the actual operation of the lead-cooled fast reactor.