城市局部气候分区及其参数化条件下风环境模拟 - 地球环境学报.pdf

第7 卷 第5 期 地球环境学报 Vol.7 No.5 2016 年 10 月 Journal of Earth Environment Oct. 2016 doi:10.7515/JEE201605004 城市局部气候分区及其参数化条件下风环境模拟 张云伟，顾兆林，周  典 （西安交通大学人居环境与建筑工程学院，西安 710049 ） 摘  要：在改善城市空气污染和城市热岛研究时，城市风环境研究受到人们关注。利用计算流 体力学（CFD ）的方法直接对城市尺度风环境进行模拟，将是一种高效的研究方法。本文对局部 气候分区及其参数特征进行分析，针对中国城市化建筑高大化、密集化的特点以及多孔介质模 型对城市下垫面参数化的要求，提出基于局部气候分区及其参数进行城市风环境数值模拟的方 法，并以西安市西咸新区的沣西新城为例进行初步探讨。对沣西新城的模拟结果显示了本文方 法的可行性，并对该区域通风廊道建设进行分析。 关键词：城市风环境；通风廊道；多孔介质模型；城市下垫面 Simulation on urban wind environment based on local climate zones and its parameterization ZHANG Yunwei, GU Zhaolin, ZHOU Dian (School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China) Abstract: Background, aim, and scope In the face of rapid industrialization and urbanization, China is confronted with growing contradictions among urban population, resources and environment. At present, China has become one of the most polluted regions in the world. The frequency, magnitude, and intensity of haze events have kept growing over China. Reasonable urban wind environment is crucial for mitigating air pollution and urban heat island effects. Materials and methods In study of urban wind environment, the computational fluid dynamic (CFD) method is a high-efficiency method. For urban scale wind environment simulation, physical model of urban canopy layer acts a key role in determining the accuracy of the simulated results. The local climate zones (LCZs) have been validated of advantages in characterization the urban canopy layer, by dividing the urban areas into blocks. Results In the current work, local climate zone