| 长方体建筑长宽比对屋顶风力机微观选址的影响 |
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| 引用本文： | 邸建琛,侯亚丽,吕爱静,李荣阳,汪建文.长方体建筑长宽比对屋顶风力机微观选址的影响[J].太阳能学报,2022,43(4):296-303. |
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| 作者姓名： | 邸建琛 侯亚丽 吕爱静 李荣阳 汪建文 |
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| 作者单位： | 1.内蒙古工业大学能源与动力工程学院,呼和浩特 010051; 2.内蒙古工业大学风能太阳能利用技术教育部重点实验室重点实验室,呼和浩特 010051 |
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| 基金项目： | 内蒙古自治区自然科学基金（2019LH05024）； |
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| 摘 要： | 采用CFD方法,对长宽比分别为0.25、0.30、0.40、0.50、0.60、0.70、0.80、0.90的8种长方体单体高层建筑物顶面的风流场特征进行模拟计算,确定长宽比对长方体建筑物顶面风力机微观选址的影响。结果表明：长宽比越大,建筑顶面低风速区域越大,且风速随高度增长得越慢,而迎风面拐点风速恢复最快;同时由于建筑物顶面受阻滞流体增多,湍流强度增大,湍流强度大于20%的区域面积增大,且背风面及背风面拐点湍流强度最大;长宽比越小,适合安装风力机的高度越低,如长宽比HAR=0.25时,最低安装高度为1.12H;当长宽比HAR=0.9时,最低安装高度为1.20H;对于不同长宽比的长方体建筑物,在屋顶迎风面出现风加速的起始高度一般低于背风面位置,更有利于风力机的安装。
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| 关 键 词： | 风力机 建筑物 湍流强度 风速 微观选址 |
| 收稿时间： | 2020-06-29 |
INFLUENCE OF CUBOID BUILDINGS HORIZONTAL ASPECT RATIOS ONMICRO-SITING SELECTION OF ROOFTOP WIND TURBINE |
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| Di Jianchen,Hou Yali,Lyu Aijing,Li Rongyang,Wang Jianwen.INFLUENCE OF CUBOID BUILDINGS HORIZONTAL ASPECT RATIOS ONMICRO-SITING SELECTION OF ROOFTOP WIND TURBINE[J].Acta Energiae Solaris Sinica,2022,43(4):296-303. |
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| Authors: | Di Jianchen Hou Yali Lyu Aijing Li Rongyang Wang Jianwen |
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| Affiliation: | 1. College of Energy and Power Engineering, Inner Mongolia University, Hohhot 010051,China; 2. Key Laboratory for Wind and Solar Power Energy Utilization Technology, Ministry of Education and Inner Mongolia, Hohhot 010051, China |
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| Abstract: | To determine the suitable mounting location and height of the roof-mounted wind turbine, the turbulence characteristics over eight horizontal aspect ratio cuboid buildings were simulated via the computational fluid dynamic（CFD）method, in which the horizontal aspect rate are 0.25, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80 and 0.90, respectively. The results show that when horizontal aspect ratio increases and the cross-sectional shape of a cuboid building becomes closer to the square,the larger area of low wind speed at the top of the building,and the wind speed increases more slowly with height, while the wind speed recovers fastest at the windward corner. At the same time, the turbulence intensity increases due to the increase of stagnant fluid at the top of the building, and the area of turbulence intensity greater than 20%, the turbulence intensity at the leewardside and leeward inflection point is the highest. The smaller the horizontal aspect ratio is, the lower the suitable height for wind turbine installation is lower, for example, when the aspect ratio is 0.25, the minimum installation height is 1.12H; when the horizontal aspect ratio is 0.9, the minimum installation height is 1.20H; For cuboid buildings with different horizontal aspect ratios, the starting height of wind acceleration on the windward side of the roof is generally lower than that on the leeward side, which is more conducive to the installation of wind turbines. |
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| Keywords: | wind turbines buildings turbulence intensity wind speed micrositing |
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