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An analytical expression for transient distribution of passive contaminant under steady flow field

机译：稳态流场下被动污染物瞬态分布的解析表达式

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摘要

Traditionally the indoor contaminant dispersion can be obtained by CFD methods. However, there is no direct relationship to quantify the transient influence of different boundary conditions including contaminant in supply air, contaminant source and initial condition on indoor contaminant distribution. To reveal such kind of influence directly, a series of transient accessibility indices are defined and a concisely analytical expression to calculate the transient contaminant distribution is then developed. The proposed expression can explicitly and quantitatively reflect the impact of supply air, contaminant source and initial condition on the contaminant distribution indoors. An experimental measurement is employed to validate the reliability of the analytical expression. It is shown that the results from the expression agree well with experimental measurement The proposed expression may take an important role in the optimization of ventilation design and online control.
机译：传统上，室内污染物扩散可以通过CFD方法获得。但是，没有直接关系来量化不同边界条件（包括送风中的污染物，污染物源和初始条件）对室内污染物分布的瞬态影响。为了直接揭示这种影响，定义了一系列瞬态可及性指标，然后开发了一个简洁的分析表达式来计算瞬态污染物的分布。所提出的表达式可以明确，定量地反映送风，污染物源和初始条件对室内污染物分布的影响。通过实验测量来验证解析表达式的可靠性。结果表明，该表达式与实验测量结果吻合良好。所提出的表达式可能在通风设计和在线控制的优化中起重要作用。

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  • 来源
    《Building and Environment》 |2012年第6期|p.98-106|共9页
  • 作者

    Xiaojun Ma; Xiaoliang Shao; Xianting Li; Yiwei Lin;

  • 作者单位

    Department of Building Science, School of Architecture, Tsinghua University, Haidian District, Qinghuayuan, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Haidian District, Qinghuayuan, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Haidian District, Qinghuayuan, Beijing 100084, China;

    Department of Building Science, School of Architecture, Tsinghua University, Haidian District, Qinghuayuan, Beijing 100084, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ventilation; contaminant distribution; analytical expression; CFD; non-uniform indoor environment;

    机译：通风;污染物分布;分析表达式差价合约室内环境不均匀;

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