基于涡理论的H型风力机新型变桨分析  

Analysis of Variable-Pitch Strategy for H-type Wind Turbine Based on Vortex Theory

作　　者：赵振宙[1] 吴昊[1] 钱思悦 许波峰[1] ZHAO Zhen-Zhou;WU Hao;QIAN Si-Yue;XU Bo-Feng(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学能源与电气学院,南京210098

出　　处：《工程热物理学报》2020年第4期865-870,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51876054,No.11502070);国家重点基础研究发展计划(973计划)(No.2014CB046200);江苏省六大人才高峰资助项目(No.XNY-007)。

摘　　要：H型风力机叶片在0°和180°方位角,其攻角为零,扭矩为负值,附近区域性能也较差,对整机性能产生很大影响。为提高H型风力机整体气动性能,在最佳叶尖速比等于5.0时,设计了新型变桨方案。基于涡流理论,借助Matlab建立了三维风力机涡模型,分析了变桨前、后的气动载荷参数的变化规律,结果表明变桨之后攻角、扭矩系数都有改善,上下盘面高性能区域拓宽,其中下盘面效果更加明显;由涡模型可知对于直叶片H型风力机,脱体涡对它的影响最大。When H-type wind turbine in the running to 00 and 1800 position,the angle of attack are zero,the torque are negative.And near these two positions is the area with poor performance,which has a great influence on the performance of the whole machine.In order to improve this problem,a new variable blade scheme is designed when blade tip speed ratio is equal to the best 5.0.Based on vortex theory,the 3 d wind turbine model is built with Matlab,and the relevant aerodynamic load parameters of wind turbine before and after variable pitching are calculated.The results showed that the lift coefficient and torque coefficient are improved greatly,and the high performance area increased especially the down half circle.Meanwhile,it can be seen from the vortex model that the shed vortex has the greatest influence on the wind turbine.

关 键 词：H型风力机 变桨方案 涡流理论 尾涡系 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]