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Analysis of airflow over building arrays for assessment of urban wind environment

机译：分析建筑物阵列上的气流以评估城市风环境

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摘要

Large eddy simulation (LES) of the airflows around various types of block arrays was performed to estimate the pedestrian wind environment. Five types of uniform staggered block arrays with different aspect ratios and an array with a nonuniform height were selected for the simulations. The simulation accuracy was validated by comparing the drag coefficient and wind profiles with those of previous work. The characteristics of the spatially averaged mean wind profiles of the arrays were analyzed on the basis of the calculation results. This study reveals that the frontal area ratio, which is the product of the plan area ratio and building aspect ratio, is the most important parameter in estimating the pedestrian wind environment. In addition, a simple exponential equation was derived for predicting the pedestrian wind speed as a function of the frontal area ratio, which is applicable to various building aspect ratios and amounts of height variability.
机译：对各种类型的块阵列周围的气流进行了大涡模拟（LES），以估计行人的风环境。为模拟选择了五种不同纵横比的均匀交错块阵列和高度不均匀的阵列。通过将阻力系数和风廓线与以前的工作进行比较，验证了仿真的准确性。根据计算结果，分析了阵列的空间平均风廓线的特征。这项研究表明，正面面积比是规划面积比与建筑物纵横比的乘积，是估算行人风环境的最重要参数。此外，还推导了一个简单的指数方程式，用于预测行人风速与正面面积比的关系，该方程式适用于各种建筑纵横比和高度变化量。

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  • 来源
    《Building and Environment》 |2013年第1期|56-65|共10页
  • 作者

    Azli Abd Razak; Aya Hagishima; Naoki Ikegaya; Jun Tanimoto;

  • 作者单位

    Faculty of Mechanical Engineering, Universiti Teknologi MARA, 40450 Shah Alam Selangor, Malaysia;

    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga-shi, Fukuoka 816-8580, Japan;

    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga-shi, Fukuoka 816-8580, Japan;

    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga-shi, Fukuoka 816-8580, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    large eddy simulation; frontal area ratio; plan area ratio; aspect ratio; pedestrian wind speed;

    机译：大涡模拟额叶面积比计划面积比;长宽比行人风速;

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