空冷岛对周围大气流场影响数值模拟

发布时间：2018-04-26 01:42

本文选题：空冷岛 + 局地大气环境　；参考：《热力发电》2016年11期

【摘要】：空冷岛的布置会对周围大气流场产生影响,使边界层内参数发生变化。本文使用Gambit软件建立了空冷岛模型,为使模拟结果与实际情况更接近,通过自定义程序(UDF)加载大气边界层函数,并针对不同的温度层结,设置了不同的温度分布函数,最后应用Fluent软件对空冷岛对局地环境的影响进行了模拟分析。结果表明:在空冷岛下游流场区域,由于空冷岛及其周边建筑物的阻碍作用,风速明显减小,而稳定层结对这种影响具有抑制作用,随着向下游流场的延伸,对速度的影响逐渐减弱;空冷岛的热排放使周围的气体混合更加剧烈,湍动能在竖直方向上发生剧烈变化;空冷岛对温度的影响范围主要集中在100m高度以下,随着高度的增加,这种影响逐渐减弱。
[Abstract]:The arrangement of the air-cooled island will affect the surrounding atmospheric flow field and change the parameters in the boundary layer. In this paper, an air-cooled island model is established by using Gambit software. In order to make the simulation results closer to the actual situation, the atmospheric boundary layer functions are loaded by a custom program, and different temperature distribution functions are set up for different temperature layers. Finally, the effect of air cooling island on local environment is simulated and analyzed by Fluent software. The results show that in the downstream flow field of the air-cooled island, the wind speed decreases obviously due to the blocking effect of the air-cooled island and its surrounding buildings, but the stability layer has an inhibitory effect on this effect, and with the extension of the downstream flow field, The influence of air cooling island on the temperature is gradually weakened, the heat emission of the air-cooled island makes the gas mixing more intense, and the turbulent kinetic energy changes sharply in the vertical direction, and the influence range of the air-cooled island on the temperature is mainly below 100m, with the increase of the height, This effect is gradually waning.
【作者单位】：华北电力大学能源动力与机械工程学院;
【基金】：中央高校基本科研业务项目(2015MS114)
【分类号】：TM621

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