不同风向下输电塔对气象监测的塔影干扰效应

Tower Shadow Effect of Transmission Towers on Meteorological Monitoring under Different Wind Directions

针对均匀风荷载作用下5C3-SJ3型输电塔的绕流流场开展数值模拟,探究0°~180°风向角范围内,输电塔对气象监测的塔影干扰效应。通过求解雷诺平均Navier-Stokes方程模拟输电塔周围绕流流场,湍流模型采用Realizable k-ε模型,并且运用切割体网格技术对计算域进行网格划分。通过探究各截面风速变化较小的区域,讨论不同风向下塔影干扰效应最小的截面,揭示了风向角对输电塔塔影干扰效应的影响规律。结果表明:塔腿横隔面和塔身横隔面中迎风侧杆件附近的塔影干扰效应最小,可考虑将气象监测点设置在相应位置上。通过三维计算流体动力学的方法,确定了塔影干扰效应较小的区域,并分析了风向角对塔影干扰效应的影响程度。研究结果对风资源数据的准确评估具有一定的指导意义。

Numerical simulation of the flow field around the 5C3-SJ3 transmission tower under uniform wind load was conducted to explore the tower shadow interference effect of the transmission tower on meteorological monitoring within the range of 0 °~180 ° wind angle.By solving the Reynolds averaged Navier Stokes equation to simulate the flow field around the transmission tower,the turbulence model adopts Realizable k-ε model and use cutting volume mesh technology to mesh the computational domain.By exploring the regions where the wind speed at each section varies slightly,the section with the smallest tower shadow interference effect under different wind directions was discussed,and the influence rule of wind direction angle on the tower shadow interference effect of transmission towers was revealed.The results show that the tower shadow interference effect near the windward side members in the tower leg and body diaphragms is the smallest,and it is advisable to consider setting meteorological monitoring points at corresponding locations.The method of three-dimensional computational fluid dynamics was used to determine the regions where the tower shadow interference effect is relatively small,and the impact of wind direction angle on the tower shadow interference effect was analyzed.The research results have certain guiding significance for the accurate evaluation of wind resource data.