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Numerical simulations on the leakage and diffusion of tritium

机译：氚渗漏与扩散的数值模拟

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摘要

Based on the knowledge that the surroundings of tritium leakage and diffusion in hydrogen storage vessels can be either open space or closed space, the subsonic jet flow of a slow tritium leak from a hydrogen storage bed under open and closed spatial conditions is simulated by Fluent finite element software. Furthermore, the quantitative relationship between mass flow rate and time is established by using the user defined function (UDF) to compile interface codes. The subsonic tritium jet, velocity profiles, tritium diffusion distance, and the tritium concentration along the jet trajectory are obtained in two different scenarios (open space and closed space). The results show that the closed space inhibits the vertical convection diffusion of tritium and has a favorable improving effect on the horizontal convection diffusion of tritium, whereas the open space has the opposite influence on the convection diffusion of tritium. In addition, an eddy current whirlpool develops under the closed space condition. The concentration distribution along the jet center line can be significantly influenced by the spatial boundary condition and leak aperture. An increase of leak aperture facilitates vertical diffusion of tritium and the velocity near the leakage hole. The oblique downward wind and horizontal wind lead to an enhancement of tritium cloud horizontal drifting. The oblique upward wind can be considered as a method to effectively dilute leaked tritium concentration.
机译：基于知识，即储氢容器中的氚泄漏和扩散的周围可以是开放空间或闭合空间，通过流畅的有限情况模拟从开放和闭合的空间条件下从储氢床上的缓慢氚泄漏的亚音速喷射流动元素软件。此外，通过使用用户定义的函数（UDF）来编译接口码来建立质量流量和时间之间的定量关系。在两个不同的场景（开放空间和闭合空间）中，获得亚音速氚射流，速度曲线，氚扩散距离和沿喷射轨迹的氚浓度。结果表明，封闭空间抑制了氚的垂直对流扩散，对氚水平对流扩散具有有利的提高影响，而开放空间对氚对流扩散的影响相反。此外，涡流涡流在封闭的空间条件下开发。沿喷射中心线的浓度分布可以受到空间边界条件和泄漏孔的显着影响。泄漏孔径的增加有助于氚的垂直扩散和泄漏孔附近的速度。倾斜向下的风和水平风导致提高氚云横漂。倾斜向上风可以被认为是有效稀释泄漏氚浓度的方法。

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  • 来源
    《Fusion Engineering and Design》 |2020年第10期|111749.1-111749.10|共10页
  • 作者

    Li Wei; Kou Huaqin; Zeng Xiangguo; Cui Yehui; Chen Huayan; Wang Fang;

  • 作者单位

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Earth Sci & Engn Chengdu 610065 Peoples R China;

    China Acad Engn Phys Mianyang 621900 Sichuan Peoples R China;

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Earth Sci & Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Earth Sci & Engn Chengdu 610065 Peoples R China;

    Sichuan Univ Coll Architecture & Environm MOE Key Lab Deep Earth Sci & Engn Chengdu 610065 Peoples R China;

    Southwest Univ Sch Mat & Energy Chongqing 400715 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Tritium leakage; Diffusion; Open space; Closed space; Numerical simulations;

    机译：氚泄漏;扩散;开放空间;封闭空间;数值模拟;

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