某超高吸热塔数值风洞模拟研究  

Numerical wind tunnel simulation of an ultra-high heat absorption tower

作　　者：顾洪波 俞昊然 陈响荣 田伟 GU Hongbo;YU Haoran;CHEN Xiangrong;TIAN Wei(East China Electric Power Design Institute Co.,Ltd.,China Power Engineering Consulting Group,Shanghai 200063,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]中国电力工程顾问集团华东电力设计院有限公司,上海200063 [2]东南大学土木工程学院,江苏南京211189

出　　处：《武汉大学学报（工学版）》2022年第S01期177-182,共6页Engineering Journal of Wuhan University

摘　　要：某700 MW光热项目具有目前世界最高的光热吸热塔,其高度带来的非常规抗风设计需要特别关注。利用FLUENT软件对吸热塔进行了足尺数值模拟,计算了4种工况下9个角度的整体体型系数,分析了结构的自振特性,并对各工况下风速和风向角对风振响应的影响以及阻尼比对结构塔顶位移和底部剪力的影响进行了研究,最后分析了设置破风圈对结构抗风性能的提升效果。结果表明,该吸热塔的体型系数相对较小,振型以前2周期为主,阻尼比建议取值不大于1%,设置破风圈可以有效减小横向涡振影响。A 700 MW solar thermal project has the highest solar thermal tower in the world,which requires special attention for its unconventional wind-resistant design.In this paper,full-scale numerical simulation of the heat-absorption tower was carried out by using FLUENT software.The overall towel shape coefficient of 9 angles under 4 working conditions was calculated,and the natural vibration characteristics of the structure was analyzed.Moreover,the influence of wind speed and direction angle on wind vibration response and the influence of damping ratio on the top displacement and bottom shear of the tower under various working conditions was also studied.Finally,the effect of setting the wind breaker on improving the wind resistance of the structure was analyzed.The results show that the shape coefficient of the absorber is relatively small,and the vibration mode is dominated by the first two periods.The optimal damping ratio range is not bigger than 1%,and the effect of transverse vortex vibration can be effectively reduced by setting the wind break circle.

关 键 词：光热吸热塔 数值风洞模拟 体型系数 风振响应 

分 类 号：TU347[建筑科学—结构工程]