温度对平行建筑物风场的影响研究

Influence of Temperature on Wind Environments around Parallel Buildings

利用CFD分析软件Fluent,基于标准的k-ε湍流模型,分析了温差对建筑物流场的分布。结果表明:在建筑物背风面的尾流区,温差对建筑物风场的影响极为明显,越靠近地面对风速和湍流强度的加强作用越明显,随着高度升高,温差的影响效果减弱;温差对最大风速出现的位置没有影响,只是改变了最大风速的数值。实际分析表明,温差对建筑物的风场存在影响,在进行建筑物风场分析时,需要考虑温差的影响。

By using the CFD analysis software Fluent and based on the standard k-ε turbulence model,this paper deals with the temperature difference affects the flow around the buildings with different spacing. The result shows in the wake area of the building,the influence of the temperature difference on the wind farm is obvious. The closer it is to the ground,the stronger the strengthening function will be,while the height increases,the influence gets weak. Meanwhile,it is found that the temperature difference doesn't change the location of the maximum wind speed,but changes its value. The actual analy-sis shows that the temperature difference has effects on the wind farm around the buildings;therefore the temperature difference should be taken into consideration in analyzing the wind farm around buildings.