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建筑形态参数对街道型风道通风潜力影响分析*
王伟武, 王頔, 黎菲楠
浙江大学建筑工程学院
摘要:
建筑形态参数直接影响城市街道型风道的通风潜力。为揭示中国大城市建筑形态参数对街道型风道通风效果的影响程度及机理,首先选择南京市中心区中山路两侧约10.84km2的街区为研究样区,基于python软件从高分辨率遥感图像中提取研究区内建筑密度、建筑高度和容积率;其次,借助CFD平台,通过验证参数后量化模拟获得该街区在1.5m、10m及30m等不同高度的风场图,以揭示模拟风场与建筑形态参数之间的相关性及建筑形态参数对城市通风潜力的影响。结果表明:在各高度,风速与建筑密度曲线走势相反,风速较高处与路口的位置基本一致;建筑密度与模拟风速呈负相关关系,相关系数为0.040(1.5m)、-0.475(10m)、-0.314(30m),而建筑高度与模拟风速呈正相关关系,相关系数为0.237,容积率与模拟风速无明显相关性。最后,结合南京城市核心区的建成环境特点,提出我国大城市街道型风道通风潜力改善的建筑形态参数规划的应对策略。
关键词:  通风潜力,python,CFD数值模拟,相关分析,南京中心区
DOI:
分类号:X16; TU984
基金项目:基于多源空间数据同化与风场影响参数量化模拟分析的城市风道规划方法研究,国家自然科学基金项目(面上项目,重点项目,重大项目)
Study on the influence of building shape parameters on ventilation potential of the street-type ventilated corridor
wang Weiwu, Wang Di, Li Feinan
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
Abstract:
Building shape parameters directly affect the ventilation potential of street-type ventilation corridor. Firstly, in order to reveal the influence mechanism of the building shape parameters of large cities in China on the ventilation effect of street-type ventilation corridor, the block of 10.84km2 on both sides of Zhongshan Road in downtown Nanjing was selected as the research sample area, and the building density, building height and floor area ratio in the study area were extracted based on Python software from high-resolution remote sensing images. Secondly, using the CFD platform, the wind field maps of different heights such as 1.5m, 10m and 30m were obtained by the way of quantitative simulation to reveal the correlation between building shape parameters and simulated wind field, so that the influence of building shape parameters on urban ventilation potential was obtained. The results show that the curves of wind speed and building density are opposite at each height and the position of the high wind speed is basically the same as the intersection. The building density is negatively related with wind speed, with the correlation coefficient of 0.040 (1.5 m), -0.475 (10 m), and -0.314 (30 m), while building height and wind speed are positively related, whose correlation coefficient is 0.237. The floor area ratio has no obvious correlation with the wind speed. Finally, combining with the characteristics of the built environment of the central area of Nanjing, this paper proposes the strategies of the building shape parameter planning to improve the ventilation potential of street-type corridors in large cities in China.
Key words:  Ventilation Potential  Python  CFD Numerical Simulation  Correlation Analysis  Downtown Area of Nanjing