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Numerical Study of Room Airflows Using Different Turbulence Models

机译：不同湍流模型对房间气流的数值研究

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摘要

Two-dimensional isothermal airflows in a 1/4-scale ventilated model room were numerically investigated using different turbulence models that range from the zero-equation model to the Reynolds stress model (RSM). Quantitative and qualitative comparisons were made between the numerical results and corresponding experimental data with the purpose of evaluating the performance of different turbulence models. Also investigated were the effects of the inlet boundary conditions, three-dimensional effects, and wall treatments on the numerical predictions. The results showed that all the turbulence models used in this study could capture the general flow behavior observed in the experiments, but certain differences existed in the flow patterns between the numerical predications and the experimental observations. The predicted mean velocities were closer to the measurements than the predicted turbulent kinetic energy. It was found that some turbulence models performed better in predicting mean velocities, while other models did better in predicting turbulent kinetic energy. This study shows that the selection of turbulence models should depend on the quantities being examined.
机译：使用从零方程模型到雷诺应力模型（RSM）的不同湍流模型，对1/4比例通风模型室中的二维等温气流进行了数值研究。为了评估不同湍流模型的性能，对数值结果和相应的实验数据进行了定量和定性的比较。还研究了入口边界条件，三维效应和壁处理对数值预测的影响。结果表明，本研究中使用的所有湍流模型都可以捕获实验中观察到的一般流动行为，但数值预测与实验观察结果之间的流动模式存在一定差异。预计的平均速度比预计的湍动能更接近测量值。发现一些湍流模型在预测平均速度方面表现更好，而其他模型在预测湍流动能方面表现更好。这项研究表明，湍流模型的选择应取决于所检查的数量。

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  • 来源
    《Transactions of the ASABE》 |2008年第1期|p.227-242|共16页
  • 作者

    J. B. Jiang X. Wang;

  • 作者单位

    The authors are Jianbo Jiang , Postdoctoral Fellow, Monell Chemical Senses Center, Philadelphia, Pennsylvania, and Xinlei Wang, Assistant Professor, Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois. Corresponding author: Xinlei Wang, Department of Agricultural and Biological Engineering, 1304 W. Pennsylvania Avenue, Urbana, IL 61801;

    phone: 217-333-4446;

    fax: 217-244-0323;

    e-mail: xwang2@uiuc.edu.;

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

    Airflow, Reynolds stress models, Scale model, Turbulence modeling;

    机译：气流;雷诺应力模型;比例模型;湍流模型;

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