基于大涡模拟考虑叶片停机位置大型风力机风振响应分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (7) : 92-98.

论文

柯世堂1,2 余玮1,2 王同光2

作者信息 +

Wind-included vibration response analysis for a large wind turbine blade-tower systembased on large eddy simulation

KE Shitang1,2,YU Wei1,2,WANG Tongguang2

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文章历史 +

摘要

为研究停机状态下不同叶片位置对大型风力机塔架-叶片体系风振响应的影响，以某3MW大型水平轴三叶片风力机为研究对象，首先基于大涡模拟（LES）方法对叶片八个不同停机位置下的风力机体系流场和气动力性能进行了数值模拟，并通过与国内外实测数据对比验证了本文方法的有效性；然后结合有限元方法对考虑叶片不同停机位置的风力机塔架-叶片耦合模型进行了动力特性和风振响应时域分析。主要结论为：不同叶片停机位置对风力机塔架绕流特性和气动力分布影响显著，塔架中上部风振响应受叶片不同停机位置的影响最大，尤其是迎风面和背风面的脉动位移均方差响应较大，相应最大值出现在工况八下塔顶350°位置；最大塔底弯矩出现在工况二的环向330°位置，工况五下三叶片叶尖顺风向位移响应峰值达到2.5m以上。研究表明在进行大型风力机抗风设计时应考虑不同叶片停机位置的影响。

Abstract

In order to study the effects of different blade positions on wind-included vibration responses of a large wind turbine tower-blade system under a stopped status,a 3 MW wind turbine with 3 blades developed by Nanjing University of Aeronautics and Astronautics was studied.First of all,the effects of eight different blade positions on the flow field and aerodynamic performances of the wind turbine system under stopped status were simulated with the large eddy simulation(LES).In order to verify the effectiveness of the LES method,the simulation results were compared with the actual test data of home and abroad.Then the finite element method was used to analyge dynamic characteristics and wind indaced vibration responses of the wind turbine tower-blade coupled model with different blade positions under a stopped status.The results showed that different blade positions have obvious effects on the flow characteristis of the wind turbine tower frame and the aerodynamic force distribution;the effects of different blade positions on the wind-induced vibration responses of the upper-middle part of the tower are the maximum;the mean square deviation between fluctuating displacements of windward side and leeward side is larger,its maximum value occurs at the tower top 350°position under the operation condition of 8;the maximum bending moment of the towerbottom appears at the annular 330°postion under the operation condition of 2;the peak displacements of 3 blade tips along the wind reach more than 2.5 m under the operation condition of 5.The study indicated that the effects of different blade positions under a stopped status should be considered for the anti-wind design of large wind turbine systems.

导出引用

柯世堂1,2 余玮1,2 王同光2. 基于大涡模拟考虑叶片停机位置大型风力机风振响应分析[J]. 振动与冲击, 2017, 36(7): 92-98

KE Shitang1,2,YU Wei1,2,WANG Tongguang2. Wind-included vibration response analysis for a large wind turbine blade-tower systembased on large eddy simulation[J]. Journal of Vibration and Shock, 2017, 36(7): 92-98

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