污染源位置对街道峡谷内污染物扩散分布的影响研究

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英文篇名：A Study on the Effects of Pollutant Source Location on Pollutant Dispersion in a Street Canyon 作者：张伊 英文作者：Zhang Yi;Guizhou Institute of Technology; 关键词：街道峡谷 ; 污染源位置 ; 数值模拟 英文关键词：Street canyon;;Pollutant source location;;Numerical simulation 中文刊名：GDHG 英文刊名：Guangdong Chemical Industry 机构：贵州理工学院资源与环境工程学院; 出版日期：2017-08-11 11:15 出版单位：广东化工 年：2017 期：v.44;No.353 语种：中文; 页：GDHG201715032 页数：4 CN：15 ISSN：44-1238/TQ 分类号：75+81-83

摘要

文章采用CFD(计算流体力学)数值模拟的研究方法,探究了孤立街道峡谷内不同屋顶形状和污染源位置的数值仿真模型。针对平顶-三角形屋顶和三角形-平顶屋顶,以及3种污染源,共6种工况进行研究。结果表明相同屋顶形状的污染源位置变化对于气流运动无改变,对于污染物浓度相对低的壁面浓度值改变很小,但对污染物浓度相对高的壁面浓度有较大影响,街谷上部靠近屋顶位置受污染源位置的影响逐步减小。
        The article adopts of CFD numerical simulation method,to explore the influence of the verious roof shapes and pollutant source location on wind flow in street cayon.6 conditions are considered in total which related flat-triangle and triangle-flat roof as well as three different roof type.The results show that the pollutant source locations have no effect on the air flow in street cayon.And t has less influence on the low concentration values on the wall,where more remarkable influence on the high concentration values on the wall.

引文

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