摘要
雷击是造成风电叶片损坏的重要因素之一,综合能源背景下风电设备安全可靠性更加突出。以提高风电机组雷击安全为目的,设计了一种叶片外敷导体的风电叶片雷击防护方案,并从理论及实验角度验证了该方案的雷击防护效果。重点以风力机专用翼型DU93-W-210翼型为研究对象,采用计算流体力学(CFD)方法,研究了翼型外敷导体直径对翼型气动性能的影响规律。研究结果显示,随着导体直径的增加,翼型升力系数线性减小,翼型阻力系数线性增加,升阻比下降。0°攻角时,带导体翼型升力系数下降最多,当导体直径为10 mm时,升力系数最多下降约10%。4°~16°攻角时升力系数下降相差不大,升力系数平均下降了约3%。研究结论可用于指导风电叶片新型接闪系统设计,提高风电机组雷击安全可靠性。
Lightning stroke is an important reason for wind turbine blade damage,and the safety and reliability of wind turbine equipment is more prominent in comprehensive energy utilization.To improve the protection against lightning for wind turbines,an anti-lightning scheme that covers wind turbine blades with external conductors is designed.The effect of the scheme has been verified theoretically and experimentally.Taking the DU93-W-210 airfoil which is specialized for wind turbines as an research objective,using computational fluid dynamics(CFD)method,the influence of the external conductor diameter on the aerodynamic performance of this airfoil is studied.It is found that with the increase of the conductor diameter,the lift coefficient of the airfoil decreases linearly,and the drag coefficient of the airfoil increases linearly,and the lift-drag ratio decreases.At a 0°attack angle,the lift coefficient of the airfoil with conductor drops the most.When the diameter of conductor is 10 mm,the lift coefficient decreases by 10%at the most.At a 4°-16°attack angle,lift coefficient reduces slight,which is roughly 3%on average.The research conclusion can be used to guide the design of new lightning arresting system for wind turbine blades and improve the safety and reliability of wind turbine units.
作者
李新凯
刘蔚
张廷军
王佩明
赵健
孙曼杰
LI Xinkai;LIU Wei;ZHANG Tingjun;WANG Peiming;ZHAO Jian;SUN Manjie(China Huadian Engineering Company Limited,Beijing 100070,China)
出处
《华电技术》
CAS
2020年第2期63-67,71,共6页
HUADIAN TECHNOLOGY
基金
国家自然科学基金青年基金资助项目(51806221)。
