摘要
针对偏航过程中风轮的动态尾流特性,运用计算流体力学(CFD)的基本方法对NREL PhaseVI风力机进行了30°偏航角范围动态偏航过程的模拟。通过与多个偏航角下的实验和动量叶素理论(BEM)、自由涡尾迹模拟结果对比,对比结果表明:随着偏航角的增加,风轮整体载荷减小;在风轮偏转过程中,旋转方向上附加的速度分量增大,导致风轮偏航过程中气动力系数比给定偏航角下的波动有所增加;动态偏航的速度尾迹偏斜出现延迟,宽度增加。
The unsteadiness of the wind velocity direction causes the continuous change of the wind turbine attitude, resulting in an alternative load and affecting the efficiency and safe operation of wind turbine. Unsteady CFD simulations were performed on the NREL Phase VI wind turbine under dynamic yawing from 0 ° to 30 °. The simulation are validated on some given yaw angles with comparing different numerical models(blade element model and free vortex wake method). It is found that the overall performance of wind turbine agrees well with the measurement result. The results show that the wind rotor load decreases with the increasing of the yaw angle. The dynamic yawing of wind turbine generates an additional velocity component along the rotational direction, leading to a larger fluctuation of the aerodynamic load than that of given yaw angles. The velocity contour in the wake zone occurs expansion in spanwise. The divergence of velocity recovery zone is delayed, which is enlarged in streamwise and spanwise.
作者
叶昭良
王晓东
尹佐明
康顺
Ye Zhaoliang;Wang Xiaodong;Yin Zuoming;Kang Shun(Key Laboratory of CMCPPE Ministry of Education,North China Electric Power University,Beijing 102206,China;HuBei Longyuan New Energy Co.Ltd.,Wuhan 430077,China)
出处
《可再生能源》
CAS
北大核心
2019年第3期445-450,共6页
Renewable Energy Resources
基金
国家自然科学基金项目(51876063
51576065)
中央高校基本科研业务费专项基金项目(2018ZD09
2018QN033)
关键词
水平轴风力机
动态偏航
非定常
尾流特性
数值模拟
horizontal axis wind turbine
dynamic yaw
unsteady
wake characteristics
numerical simulation
