局部开洞对高层建筑风荷载特性的研究

Research on wind characteristics of high-rise buildings with partial openings

通过运用计算流体动力学软件FLUENT对有局部开洞的高层建筑风荷载特性进行了风洞实验和数值模拟研究,得到了不同风向角下洞口周边风压系数风布以及风环境变化.本次风洞试验主要在大气边界层风洞中进行,主要对模型进行了测压试验.数值模拟采用realizable k-ε湍流模型,使用SIMPLEC算法分析了4种工况下贯穿开洞周围风压系数和周围风环境特性.研究结果表明:风压系数在洞口一侧增大,另一侧减小,影响区域的大小接近洞口尺寸.当风向角与建筑呈45°时,洞口内风速达到最大值,可以看出在高层建筑上安置风力发电机能够有效利用风能.

The wind characteristics of high-rise buildings with partial openings were analyzed through the wind tunnel test and numerical simulation based on the FLUENT software.The wind pressure coefficients and the variations in the wind environment around the opening under different wind angles were obtained.The wind tunnel test was carried out in the boundary layer wind tunnel over an urban terrain to measure the wind pressure on the model.A realizable k-εmodel was adopted in the numerical simulation and the method of the SIMPLEC algorithm was used to analyze the wind pressure coefficients and the wind environments around the opening in four cases.The results indicate that the pressure coefficient increases on one side but decreases on the side of the opening and the influential area is close to the opening size.When the wind direction is 45°with respect to the building,the wind velocity reaches the maximum,which demonstrates that high-rise buildings equipped with wind turbine can be an effective way to utilize wind energy.