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This paper establishes a model for surface flashover of polytetrafluoroethylene (PTFE) under low atmospheric pressure based on particle transport equations. Through numerical simulations, it explores the dynamic changes in electron density, electric field strength, ionization rates, and the densities of positive and negative ions. The results demonstrate that at the initial stage of surface flashover, the maximum electron density value first appears at the junction of the electrode, PTFE, and low-pressure air. Surface flashover occurs when the electron density reaches the order of 1020 m−3.

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Study on Surface Flashover of Polytetrafluoroethylene Under Low Pressure Conditions

  • 会议论文

  • 发表日期：

    2025年

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  • Rong Liu,
  • Yao Zhao,
  • Guofeng Li,
  • Peng Zeng,
  • Jinjun Wang

摘要

This paper establishes a model for surface flashover of polytetrafluoroethylene (PTFE) under low atmospheric pressure based on particle transport equations. Through numerical simulations, it explores the dynamic changes in electron density, electric field strength, ionization rates, and the densities of positive and negative ions. The results demonstrate that at the initial stage of surface flashover, the maximum electron density value first appears at the junction of the electrode, PTFE, and low-pressure air. Surface flashover occurs when the electron density reaches the order of 1020 m−3.