摘要
天空开阔度是反映城市空间形态与城市热岛效应关系的重要参数,可用于定量评价城市住宅小区室外空间的热环境。本文对五种具有不同见空率的理想城市住宅小区进行了数值模拟及比较分析。结果表明,在中低风速下,小区热环境受辐射条件所控制,小区内部地面以及1.5m行人高度处平均温度将随着天空开阔度的增大逐渐升高。因此,采用天空开阔度SVF来衡量城市住宅小区空间形态对小区室外热环境的影响程度是合适的。
The sky view factor(SVF) is a crucial influencing factor which links urban heat island with urban space morphology, and can be used to assess the outdoor thermal environment in residential districts quantitatively. In this paper, a numerical simulation is conducted and analyzed for five cases with different SVFs. The results demonstrated that under the low/middle wind speed the thermal environment is dominated by the radiation condition, and the temperature on the ground and at 1.5m pedestrian level rises with the increase of SVF. It confirms that SVF is a reasonable index to evaluate the influence of building distribution on the outdoor radiation environment.
出处
《应用力学学报》
CSCD
北大核心
2017年第6期1181-1186,共6页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金(51378128)
广东省自然科学基金(2015A030313498)
关键词
住宅小区
热环境
数值模拟
天空开阔度
太阳辐射
residential districts
thermal environment
numerical simulation
sky-view factor
solar radiation
