不同风沙流速下屋顶光伏阵列的气动载荷  

Aerodynamic Loads of Rooftop Photovoltaic Arrays under Different Wind-sand Velocities

作　　者：来永斌[1] 李超群 王龙[1] 许勇彬 LAI Yongbin;LI Chaoqun;WANG Long;XU Yongbin(School of Mechanical and Electrical Engineering,Anhui University of Science and Technology,Huainan Anhui 232001)

机构地区：[1]安徽理工大学机电工程学院,安徽淮南232001

出　　处：《湖北理工学院学报》2024年第6期1-6,35,共7页Journal of Hubei Polytechnic University

基　　金：中国电力国际发展有限公司科技项目(项目编号:ZDGL-KJ-2021-014)。

摘　　要：为解决风沙环境下光伏阵列气动载荷难以预测的问题,采用数值模拟方法,建立三维计算模型,研究了风沙流速对光伏板倾覆效应、表面压力变化及屋顶流场分布的影响。结果表明:与纯风工况相比,携沙风工况下的光伏阵列上表面风沙吸力较大,前端与尾排的光伏板的倾覆力矩系数远远大于中间两板,倾覆效应显著。各板同一区域内,风沙吸力随风沙流速增大而增大,而风沙流速变化对屋顶流场涡流分离现象与风沙压力变化分布影响较小。阵列各板的倾覆力矩都随流速增大而增大,并且倾覆力矩的增大速率也随流速增大而加快,倾覆效应增强,而倾覆力矩系数却随流速变化而变化的幅度不大,在25~30 m/s时几乎趋于平稳。In order to decrease the difficulty of predicting the aerodynamic load of photovoltaic array in wind-blown sand environment,a three-dimensional calculation model was established by using numerical simulation method to study the influence of the change of wind-blown sand velocity on the overturning effect of photovoltaic panels,the change of surface pressure and the distribution of roof flow field.The results show that,compared with the pure wind condition,the sand suction of the upper surface of the PV array is larger,and the overturning moment coefficient of the front and rear photovoltaic panels is much larger than that of the middle two panels,and the overturning effect is significant.In the same area of each plate,the suction of wind-blown sand increases with the increase of wind-blown sand velocity,and the change of wind-blown sand velocity has little effect on the vortex separation phenomenon and the distribution of wind-blown sand pressure.The overturning moment of each plate of the array and the increase rate of overturning moment both increase with the flow rate.The overturning effect is enhanced,but the overturning moment coefficient changes little with the flow rate,and tends to be stable at 25~30 m/s.

关 键 词：计算流体力学 光伏阵列 风沙流速 风沙载荷 

分 类 号：TM615[电气工程—电力系统及自动化]