摘要
为分析强风背景下水体对环湖建筑街区热湿环境的影响,运用了CFD(计算流体力学)的方法对低层型、高层型、环湖上升型、环湖下降型等4种建筑街区形态进行了数值模拟。结果显示:强风背景下,水体对上游建筑街区的温湿度影响不明显,对中下游建筑街区的温湿度影响较大,且增湿降温效应主要集中于下游中央区域。建筑街区的高度变化和高度差对街区内的温湿度场均有较大的影响,其中环湖内侧的低建筑物和内外高度差加速气流流动使得低层型、环湖上升型建筑街区的热湿环境较好,环湖内侧高建筑物的阻挡使得高层型、环湖下降型建筑街区热湿环境较差。在4种形态下建筑街区下游(V_(5)街谷)中央区域的热湿环境最好,且低温气体在流经建筑街区之后还会向后延伸100~300 m的扩散距离。研究结果表明:水体取代部分密集建筑,通过合理布局可大范围优化建筑街区的热湿环境。
In view of an analysis of the impact of water bodies on the thermal and humid environment of building blocks around the lake under strong wind conditions,CFD(computational fluid dynamics)method has been adopted for a numerical simulation of four types of building block shapes:low rise,high rise,rising,and falling.The results show that under strong wind background,the water body exerts no effect on the temperature and humidity of upstream building blocks,but has a significant impact on the temperature and humidity of middle and downstream building blocks,with the humidification and cooling effects mainly concentrated in the central downstream area.The height change and height difference of the building block have a significant influence on the temperature and humidity field within the blocks,among which the low buildings on the inner side of the lake and the height difference between the inside and outside accelerate the airflow,which results in a better thermal and humidity environment for the low rise and rising building blocks around the lake.Meanwhile,the obstruction of high buildings on the inner side of the lake leads to a poorer thermal and humidity environment for the high rise and falling building blocks around the lake.The central area downstream of the building block(Vs street valley)has the best thermal and humid environment among the four forms,with the low-temperature gas extending a diffusion distance of 100~300 m after flowing through the building blocks.The results show the substitution of some dense buildings with water bodies helps to optimize the thermal and humid environment of building blocks on a large scale based on a reasonable layout.
作者
杨明
赵福云
高菡
周宇轩!
YANG Ming;ZHAO Fuyun;GAO Han;ZHOU Yuxuan(College of Civil Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China)
出处
《湖南工业大学学报》
2024年第6期21-28,共8页
Journal of Hunan University of Technology
基金
湖北省自然科学基金(气象)创新发展联合基金资助重点项目(2022CFD016)。
关键词
环湖建筑街区
热湿环境
CFD
增湿降温效应
surrounding lake architectural block
thermal and humidity environment
CFD
humidification and cooling effect
