城风环境模拟—ENVI-met与MISKAM模型对比.PDF

城市风环境模拟—ENVI-met 与MISKAM 模型对比 1,2,3 2 杨小山 ，赵立华 （1. 南京工业大学建筑学院，南京211800 ；2. 华南理工大学 亚热带建筑科学国家重点实验室， 广州510640 ；3. 哈尔滨工业大学深圳研究生院 深圳市城市规划与决策仿真重点实验室，深圳518000） [摘 要] 应用已经过风洞实验数据验证的城市风环境模拟软件MISKAM 对三维城市微气候软件ENVI-met 预测室外风 环境的能力进行了检验，分析工况包括孤立建筑、单排树以及街区，分析内容为空气流场和建筑表面风压。比较结果显示： ENVI-met 模拟的流场和风压空间分布整体特征与MISKAM 一致，但在局部区域（例如建筑背风侧）存在一定差异，两者计 算的风速风压值也存在一定差异。研究对产生差异的可能原因进行了初步分析。通过模型对比初步证明了 ENVI-met 预测室 外风环境的合理性，为进一步深入验证ENVI-met 提供了参考。 [关键词] 城市微气候；风环境；模型对比；评估 + [中图分类号] TU119 .4 [文献标识码] A A Comparison of Wind Field Simulations between ENVI-met and MISKAM YANG Xiao-shan1,2,3，ZHAO Li-hua2 （1. College of Architecture, Nanjing Tech University, Nanjing 211800, China; 2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China; 3. Shenzhen Key Laboratory of Urban Planning and Decision Making, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518000, China ） [Abstract] The 3D urban microclimate model ENVI-met is examined with the validated numerical flow model MISKAM by focusing on outdoor wind environment. Three test cases are set for model comparison, including an isolated building, a single row of trees, and a city block. The comparing results show that the flow fields and the wind pressure distributions predicted by ENVI-met are generally consistent with those of MISKAM. However, some differences in wind speed, wind pressure, and the local flow field (e.g. the leeward side of buildings) between the two models are observed . The possible reasons for these differences are discussed. This study shows that the ENVI-met model can reasonably simulate outdoor wind environment, and provide useful information for further validation of ENVI-met. [Keywords] urban microclimate, wind field, inter-model comparison, evalu