大倾角地面太阳电池板风荷载数值模拟研究
NUMERICAL SIMULATION OF WIND LOAD ON SOLAR CELL PANEL WITH HIGH-INCLINATION
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摘要: 为深入研究现行规范中对太阳电池板风荷载体型系数的合理取值问题,应用CFD方法对倾角θ为39°的地面太阳电池板进行数值模拟分析,将计算结果与风洞试验结果进行对比,验证了采用CFD方法具有较好的精度和可靠性。在此基础上以45°风向角为间隔,对来流风向从0°~180°范围的4个风向角分别进行了风场模拟,计算了太阳电池板的风压系数、体型系数、阻力系数、升力系数和倾覆力矩系数,同时提出一种新的风压分布模型。研究结果表明在180°风向角时,风压和升力值最大;45°和135°风向角时,倾覆力矩值最大,考虑梯形分布的计算模型较为合理。最后,给出了风荷载体型系数建议值,可为太阳电池板的抗风设计提供建议和依据。Abstract: In order to study the rational value of the wind load type coefficient on solar photovoltaic panels in the existing codes,the wind field of solar photovoltaic panels with the inclination of 39 degrees was numerically analyzed by Computational Fluid Dynamics(CFD)method. Compared with the results of wind tunnel test,the CFD method is proved to be high accuracy and reliability. On this basis,the numerical simulation of wind field at four wind directions from 0° to 180° with interval 45° was carried out. The pressure coefficient of photovoltaic panels,shape coefficient,drag coefficient,lift coefficient and overturning moment coefficient were calculated. A new model of wind pressure distribution was proposed. The results show that the maximum values of wind pressure and lift force were obtained in the wind direction of 180°,and the maximum value of overturning moment was obtained in the wind directions of45° and 135°. The calculation model accounting trapezoidal distribution was reasonable. Finally,the value of wind load shape coefficient was suggested,which can be helpful for wind-resistant design of solar photovoltaic panels.