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jian zhu wu ying xiang xia da qi wu ran wu kuo san shu zhi mo ni fang fa de bi jiao
Author(s): 
Pages: 1824-1832
Year: Issue:  7
Journal: Acta Scientiae Circumstantiae

Keyword:  computational fluid dynamics softwarelarge eddy simulationAERMODbuildingsatmospheric pollutant dispersionsimulation capability;
Abstract: 利用计算流体力学软件Fluent6.3.26提供的大涡模式和国标推荐的AERMOD模式分别对方形建筑物影响下的大气污染物扩散进行了模拟,通过与风洞实验结果的比较,对各模式的模拟能力进行了评价.结果表明,大涡模式对污染物散布特征的模拟与风洞实验结果基本一致,对建筑物顶部、空腔区和尾流区等区域污染物浓度分布的模拟效果均处于可接受水平;AERMOD模式模拟结果与风洞试验结果偏离较远,尤其是对空腔区污染物散布的模拟能力较差,误差较大.与大涡模式Y/H=0平面流场模拟结果对比(H为建筑物高度),AERMOD模式对风场的假设未能客观地反映建筑物附近气流变化的基本特征,是误差的主要来源之一,建议结合大涡模式订正,提高模拟结果的准确性.
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