基于大涡模拟的平屋顶槽式聚光器组风压分布研究  

Research on Wind Pressure Distribution of Flat Roof Trough Concentrator Group Based on Large Eddy Simulation

作　　者：邹琼 刘毅超 李正农[2] ZOU Qiong;LIU Yichao;LI Zhengnong(College of Civil Engineering,Xiangtan University,Xiangtan 411105,China;Key Laboratory of Building Safety and Energy Efficiency(Hunan University),Ministry of Education,Changsha 410082,China)

机构地区：[1]湘潭大学土木工程学院,湖南湘潭411105 [2]建筑安全与节能教育部重点实验室(湖南大学),湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2023年第11期204-215,共12页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51708478);湖南省自然科学基金资助项目(2020JJ5549)。

摘　　要：通过大涡模拟对屋顶槽式聚光器组的风压分布规律展开研究,并将数值模拟结果和风洞试验结果进行对比,验证了大涡模拟结果的准确性.对9个平屋顶聚光器组成的镜群在0°仰角工况下的风压分布进行模拟,得到平屋顶聚光器组在不同风向角下的最不利位置及其风压系数的分布规律.结果表明,正风向下,屋顶靠近来流风上游的一排聚光镜承受了绝大部分的风荷载,中间及后排的聚光镜风压系数为前排的8.75%;斜风向下,后排聚光镜的最大风压系数为前排聚光镜的17.6%;屋顶的角落位置为聚光器组的最不利位置,所得结论可为平屋顶槽式聚光器的群组结构抗风设计提供理论依据.The wind pressure distribution law of the roof trough concentrator group is studied by large eddy simulation,and the numerical simulation results were compared with the wind tunnel experimental results to verify the accuracy of the large eddy simulation results.Then,the wind pressure distribution of a mirror group of nine flat roof concentrators was simulated under 0°elevation angle working conditions,and the most disadvantaged position of the flat roof concentrator group under different wind angles and the distribution law of its wind pressure coefficient were obtained.The results show that in the positive wind direction,the row of mirrors on the roof near the upstream of the incoming wind carries most of the wind load,and the wind pressure coefficient of the middle and rear rows of mirrors is 8.75%of that of the front row;in the oblique wind direction,the maximum wind pressure coefficient of the rear row of mirrors is 17.6%of that of the front row of mirrors;the corner position of the roof is the most disadvantaged position for the group of mirrors.The obtained conclusions can provide a theoretical basis for the design of the wind resistance of the group structure of slotted concentrators on flat roofs.

关 键 词：槽式聚光器 屋顶 大涡模拟 风压系数 风洞试验 

分 类 号：TU352.2[建筑科学—结构工程]