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本文利用基于CTTC模型的DUTE软件,以湿热地区广州的城市街谷为例,对城市街谷内的湿球黑球温度(WBGT)和热岛强度进行了模拟计算。通过对比分析,比较了不同高宽比、走向、对称性、绿化等设计因素对街谷内日间平均WBGT和热岛强度的影响。研究结果表明:窄街谷较之宽街谷、南北走向街谷较之东西走向街谷有着更好的热环境;街谷乔木率与热岛强度的降低呈线性正相关;对称与否对街谷内热环境的影响较小。本文初步探索了街谷几何形态及绿化对街谷热环境的定量影响,为城市规划和街谷设计提供了有针对性的参考指引,以期促进街谷热环境的设计,营造安全、舒适的街谷热环境。
In this paper, we use DUTE software based on CTTC model to take the urban street valley in Guangzhou as an example to simulate the wet-bulb black-ball temperature (WBGT) and heat island intensity in urban street valley. Through comparative analysis, the effect of design factors such as aspect ratio, trend, symmetry and afforestation on daytime average WBGT and heat island intensity in the street valley was compared. The results show that the narrow street valley compared with the wide street valley, the north-south street valley to the east-west street valley has a better thermal environment; street tree arbor and heat island intensity decreased linearly positive; symmetry or not within the street Less impact on the thermal environment. This paper explores the quantitative impact of street geometry and greenery on the thermal environment in the street valley, and provides targeted reference for urban planning and street valley design in order to promote the design of thermal environment in the street valley and create a safe and comfortable street Valley thermal environment.