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与机理,首先选择南京市中心区中山路两侧约10.84 km^2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样区内建筑密度、建筑高度和容积率;其次,借助CFD平台,通过验证参数后的量化模拟获得该街区在1.5 m、10 m与30 m等高度的风场图,以揭示模拟风场与建筑形态参数之间的相关性以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(1.5 m)、-0.475(10 m)与-0.314(30 m),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,提出改善我国大城市街道型风道通风潜力的建筑形态参数规划应对策略。
Building shape parameters directly affect the ventilation potential of street-type ventilation corridors.With the rapid urbanization in China,large-scale development and construction within urban area have led to changes in the urban spatial forms so that the roughness of urban underlying surfaces has increased.Urban heat island and urban smog have become prominent urban environmental problems in recent years.Urban ventilation corridor planning has become an important research topic as a significant means to improve urban ventilation and control urban air pollution as well.Traditionally,within academic spheres,the quantitative analysis of urban ventilation corridors has been discussed in terms of the macro and micro scales.Macro-scale researches mostly focus on quantitative analysis of urban air conditions and some ideas for building urban ventilation corridors,while the latter often use CFD simulation techniques to simulate air conditions in projects or blocks.Although domestic researches on urban ventilation corridor planning and construction have certain guiding significance,planning research results are barely used practically,with a lack of focus on basic quantitative research.Therefore,the ventilation potential of the urban ventilation corridors is combined with the control of the building shape parameters(building density,building height and floor area ratio)in the regulatory plan at the medium-micro scale(such as the sub-division scale and the block scale).It is of great significance to formulate specific control measures to improve urban ventilation at the level of regulatory plan.This paper attempts to figure out the quantitative relationship between simulated wind speed and building shape parameters in urban central area by a combination of qualitative analysis and quantitative simulation,and reveal the correlation between the building shape parameters and ventilation potential,so that operational planning strategies can be proposed to improve the ventilation potential of urban ventilation corridors.Fi
作者
王伟武
王頔
黎菲楠
WANG Weiwu;WANG Di;LI Feinan
出处
《西部人居环境学刊》
2020年第3期69-76,共8页
Journal of Human Settlements in West China
基金
国家自然科学基金项目(51578482)。
关键词
通风潜力
PYTHON
CFD数值模拟
相关分析
南京中心区
Ventilation Potential
Python
CFD Numerical Simulation
Correlation Analysis
Downtown Area of Nanjing
