摘要
珠江城商务写字楼高309.6m,在大楼中上部建造4个风洞(吸风口)并安装有4个风能发电机进行风能发电。通过大比例尺(1∶150)模型的风洞试验,研究吸风口内风速放大效应;利用全尺寸CFD数值模拟评估在3年重现期风速下风机运行及气流流经吸风口引起的噪声影响;通过CFD数值模拟获得来流为40m/s时风机切入绕流的风荷载,建立风机及其上下8个楼层范围内的结构有限元模型,并将CFD数值模拟获得的风荷载作为输入荷载评估了风机运行时对其连接的上下两个楼层振动的影响。研究结果表明:①建筑外形及吸风口的喇叭口形状对气流具有明显的加速作用;②受到周边建筑的干扰作用,出现明显的"峡谷风效应",有周边工况下吸风口的风速放大效应出现在2号吸风口(tunnel-2);③在绝大多数情况下,4个吸风口均能达到风机运行时所需的风速要求,风力发电基本能够正常运行;④在3年重现期风速下,风机运行及气流流经吸风口产生的噪声小于50分贝,满足城市2类地区的噪声限制要求;⑤在吸风口处的来流风速为40m/s情况下,风机运行产生的振动较小,满足高层建筑对结构振动舒适度的要求;⑥在超高层建筑上实施风力发电是可行的,乃利用可再生能源的一种创新策略。
Pearl River Tower （PRT） with a height of 309.6m and located in Guangzhou was designed to include four wind turbines for wind power generations in four wind tunnels in the building. This paper presented some selected results of the characteristics of wind speed amplifications in the four tunnels in PRT based on wind tunnel test with a rigid model of a large geometric scale 1： 150. Estimations of noise distributions produced by the running wind turbines and wind flow through the tunnels were obtained by means of CFD numerical simulation. The vibrations of the floors near the wind turbines affected by the running wind turbines were evaluated through dynamic analysis using finite element models of the wind turbines and nearby 8 floors and the additional loads induced by wind flow with a velocity of 40m/s through the tunnels. The experiment and numerical results show that： ① the specially designed shapes of the tunnels have distinct effects on flow amplification; ② significant effect induced by interference on the neighboring buildings was observed, and the maximum wind speed ratio of 2.71 was found in tunnel-2; ③ in most cases, the four tunnels can get required wind speed for wind power generation; ④ the noises caused by the running wind turbines and wind flow through the tunnels under the wind speed with a return period of 3 years were less than 50db, which satisfies the noise limitation for city areas; ⑤ the vibrations induced by the running wind turbines with the approaching wind speed of 40m/s were small, which satisfies the limitations of comfort level for high-rise buildings ; ⑥ it is a feasible way to develop wind power generation on super-tall buildings, which is also an innovative strate~ on utilization of renewable energy sources.
出处
《土木工程学报》
EI
CSCD
北大核心
2012年第9期11-18,共8页
China Civil Engineering Journal
基金
国家自然科学基金(90815030
51178179)
关键词
超高层建筑
低碳建筑
风能发电
风洞试验
数值模拟
有限元分析
风效应
super-tall building
low carbon building
wind power generation
wind tunnel test
numerical simulation
finite element analysis
wind effect
