城市街谷的空气流动与污染物扩散研究——物理模型的发展及数学模拟

被引：9

作者：

顾兆林 ^{[1
]}

张云伟 ^{[2
]}

机构：

[1] 西安交通大学人居环境与建筑工程学院

[2] 西安交通大学能源与动力工程学院

来源：

地球环境学报 | 2011年 / 2卷 / 02期

关键词：

城市街谷; 空气流动; 污染物扩散; 数值模式;

D O I：

暂无

中图分类号：

X51 [大气污染及其防治];

学科分类号：

0706 ; 070602 ;

摘要：

本文对关于街谷内空气流动及污染物扩散的研究进行评述。通过街谷物理模型及边界条件的分析,揭示影响街谷内空气流动与污染物扩散的物理因素,为进一步的数值预报模式的研究和数值模拟精度的提高提供思路。本文发现街谷几何结构和变化的背景风速、风向是影响街谷内空气流动与污染物扩散的主要因素。而街谷内大气稳定度和行驶车辆诱导湍流能很大程度影响街谷内的湍流强度和污染物分布,尤其在弱风环境下。在有绿化树木存在的街谷内绿化树木的影响也不容忽视。目前的经验、半经验模式对街谷模型真实性因素和气象条件考虑不够,造成模拟、预报结果误差较大。未来数值模式的发展重点在基于CFD的综合模式开发,并充分考虑街谷模型真实性因素和气象条件的影响。

引用

页码：362 / 373

页数：12

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