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| 杭州商业街道空间布局形态关键要素对周边风环境的影响 | |
| 引用本文： | 应小宇,阚琪.杭州商业街道空间布局形态关键要素对周边风环境的影响[J].地理科学,2018,38(12):2093-2099. |
| 作者姓名： | 应小宇 阚琪 |
| 作者单位： | 1.浙江大学城市学院,浙江 杭州310014 2.浙江大学建筑工程学院,浙江 杭州310058 |
| 基金项目： | 国家自然科学基金项目（51878608）、浙江省自然科学基金项目（LY18E080025）资助 |
| 摘 要： | 利用基于计算流体力学（CFD）理论的数值模拟软件,在不影响街道连续性面貌的前提下,通过控制变量法分别改变街道贴线率、街道界面密度、街道高宽比3个关键要素的数值来观察街道风环境的变化情况。结论主要有： 街道内的风速大小随着街道贴线率的增大呈抛物线趋势变化,先增大后减小,在街道贴线率接近70%时,城市街道内风速达到最大; 随着界面密度的不断减小,城市街道内各个测点的风速变化的幅度越来越大,这样会让在其中行走的行人感受到强烈的风速变化,舒适度大为下降; 城市街道内的平均风速和街道高宽比成反比例关系。 |
| 关 键 词： | 街道空间布局 风环境模拟 街道贴线率 街道界面密度 街道高宽比 |
| 收稿时间： | 2017-11-25 |
| 修稿时间： | 2018-03-14 |
The Influence of Street Spatial Layout Factors on Wind Environment in Hangzhou,Zhejiang |
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| Xiaoyu Ying,Qi Kan.The Influence of Street Spatial Layout Factors on Wind Environment in Hangzhou,Zhejiang[J].Scientia Geographica Sinica,2018,38(12):2093-2099. | |
| Authors: | Xiaoyu Ying Qi Kan |
| Institution: | 1. Zhejiang University City College, Hangzhou 310014, Zhejiang, China 2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, Zhejiang, China |
| Abstract: | With a rapid urbanization in Asia, the high-density new urban-center districts have already changed the microclimate in the city. Because of the using characters of building, the commercial streets which have emerged massively making a large number of pedestrians appear, pedestrian comfort in the commercial streets of the new urban-center districts requires more attention. Different street spatial layout will lead to change the internal wind environment in it and then affect the pedestrian comfort. Computational fluid dynamics (CFD) models are used to study the correlation between the three main street spatial layout factors, which are near-line rate, street interface density and street aspect ratio, under the simulation of relevant weather conditions. The results are mainly the following three points, first, the wind speed within the street change with the increase in the near-line rate like a parabola trend, and the wind speed reaches its peak about at a near-line rate of 70%. In that cases, it’s conducive to ventilation. Second, as the street interface density decreases, the variation of the wind speed of each measuring point in the city streets is getting bigger and bigger, and then the pedestrian walking in it will feel a strong wind speed change and the comfort is greatly reduced. Thirdly, the wind speed in the city streets is inversely proportional to the street aspect ratio. These conclusions will provide an important reference and evaluation basis for urban designers at the beginning of the design to effectively avoid future wind environmental problems. |
| Keywords: | street spatial layout wind environment near-line rate street interface density street aspect ratio |
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