钝后缘风力机翼型的环量控制研究

乔晨亮; 许和勇; 叶正寅

doi:10.6052/0459-1879-18-164

钝后缘风力机翼型的环量控制研究

doi: 10.6052/0459-1879-18-164

乔晨亮^,,
许和勇^2,), ,,
叶正寅^*,

^*西北工业大学航空学院,西安710072
^†西北工业大学深圳研究院,广东深圳 518057

基金项目: 1) 国家自然科学基金(11472223)和中央高校基本科研业务费资助项目.

详细信息

作者简介:
作者简介: 2) 许和勇,教授,主要研究方向：计算流体力学、流动控制.E-mail:xuheyong@nwpu.edu.cn

通讯作者:
乔晨亮,许和勇,叶正寅

乔晨亮,许和勇,叶正寅

乔晨亮,许和勇,叶正寅

中图分类号: V211.3;
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出版历程
- 刊出日期: 2019-01-18

CIRCULATION CONTROL ON WIND TURBINE AIRFOIL WITH BLUNT TRAILING EDGE

^*School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
^†Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, Guangdong, China

摘要

摘要: 钝后缘风力机翼型具有结构强度高、对表面污染不敏感等优点,但其较大的阻力系数使得翼型的整体气动特性不够理想. 利用环量控制方法对钝后缘风力机翼型进行了流动控制,以改善钝后缘风力机翼型的气动特性,减弱尾迹区脱体涡强度. 通过对钝后缘风力机翼型环量控制方法进行相关的数值模拟,对比研究了环量控制方法的增升减阻效果, 研究了环量控制下翼型升阻力特性随射流动量系数的变化规律,并对不同射流动量系数下环量控制方法的气动品质因子和控制效率进行了分析. 研究结果表明：环量控制方法能够大幅提升钝后缘风力机翼型的升力系数,同时有效地降低翼型的阻力系数; 翼型的升力系数随射流动量系数的增大而增大,表现出很明显的分离控制阶段和超环量控制阶段的变化规律; 射流能耗的功率系数随射流动量系数的增大而增大,且增长速率逐渐增大;实施环量控制方法后叶片的输出功率同样随射流动量系数增大而增大,但增长速率逐渐降低. 总体来说,环量控制方法可以有效地改善钝后缘风力机翼型的气动特性以及功率输出特性,在大型风力机流动控制中具有很好的应用前景.
- 风力机 /
- 流动控制 /
- 钝后缘翼型 /
- 环量控制 /
- 射流 /
- 能效分析
Abstract: The blunt trailing edge wind turbine airfoil has the advantages of high structural strength and insensitive to surface contamination, but its larger drag coefficient makes the aerodynamic characteristics of the blunt trailing edge wind turbine airfoil unsatisfactory. The circulation control method is implemented on a blunt trailing edge wind turbine airfoil in order to improve the aerodynamic characteristics of the blunt trailing edge wind turbine airfoil, and weaken the strength of the shed vortex. The circulation control on a blunt trailing edge wind turbine airfoil is investigated using numerical simulation methods. The effectiveness of the circulation control method in increasing lift and reducing drag is researched. The variation of lift and drag coefficients with the jet momentum coefficient is studied, and the aerodynamic figure of merit and the control efficiency of the circulation control with different jet momentum coefficients is analyzed. The results show that the circulation control can significantly enhance the lift coefficient of the blunt trailing edge airfoil, and effectively reduce the drag coefficient of the airfoil; the lift coefficient of the airfoil increases with the jet momentum coefficient, and two typical control regimes, namely, separation control and super-circulation control, are observed; the power coefficient of jet increases with increasing jet momentum coefficient, and growth rate gradually increases; the output power of blade also increases with increasing jet momentum coefficient, but the growth rate decreases gradually. It is demonstrated that the circulation control method can significantly improve the aerodynamic characteristics and power output characteristics of blunt trailing edge wind turbine airfoils, and it has a good application prospect in large wind turbine flow control.
- wind turbine /
- flow control /
- blunt trailing edge airfoil /
- circulation control /
- jet /
- energy efficiency analysis

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