超/特高压输电线路导线体型系数Fluent仿真研究

Fluent Simulation Study on the Shape Coefficient of EHU/UHV Multi-splitting Conductor

在超/特高压输电线路导线风荷载计算中,体型系数与导线分裂数及布置情况密切相关,子导线间相互间距较近时,还需要考虑风相互干扰的群体效应。基于k-ε双方程湍流模型,采用Fluent软件进行数值模拟,研究了风速、外径、分裂间距、分裂根数、风攻角及风向角对多分裂导线体型系数的空气动力学影响。研究结果显示,风速、外径、分裂间距、分裂根数、风攻角及风向角等影响因素对多分裂导线体型系数均有较大影响,由于导线之间存在屏蔽效应,整体的迎风面上的导线数量越多,屏蔽效应越明显,体型系数就越小。

In the wind load calculation,the shape coefficient of EHU/UHV transmission line is closely related to the number and arrangement of bundled conductor. If the branch conductors stay close, the group effect of wind interference should also be considered. By applying k-ε double equation turbulence model and numerical simulation through Fluent software, we studied the aerodynamic effects of wind speed, outer diameter, splitting distance, splitting number, wind angle of attack and wind direction on the shape factor of multi-split conductors. The result shows that above factors have great impacts on the coefficient. And influenced by shielding effect between conductors, the larger the number of conductors in windward surface, the stronger the effect, the smaller the coefficient.