基于CFD技术的垂直轴风力机关键气动问题研究  

CFD ANALYSIS OF KEY AERODYNAMIC PROBLEMS OF VERTICAL AXIS WIND TURBINE

作　　者：潘盼[1] 蔡新[1,2] 朱杰[1] 顾荣蓉[1] 

机构地区：[1]河海大学力学与材料学院,南京210098 [2]水资源高效利用与工程安全国家工程研究中心,南京210098

出　　处：《太阳能学报》2015年第12期2860-2866,共7页Acta Energiae Solaris Sinica

基　　金：江苏高校"沿海开发与保护协同创新中心"计划(苏政办发[2013]56号);南通市科技计划引导专项(2013400303)

摘　　要：采用CFD软件对麦克马斯特大学垂直轴风力机进行数值模拟,结果表明:在不同叶尖速比下,风力机计算功率与风洞试验数据吻合良好;风轮中上行叶片尾流影响下行叶片气动特性,与单根叶片风力机模型相比,叶片扭矩峰值降低,峰值发生时间延迟;旋转叶片与平流流场中叶片相比,扭矩峰值有显著提升;叶片的附加质量效应有助于风力机降低支撑杆的设计强度,但增大了叶片与支撑杆的作用力;具有弯度翼型的风力机功率输出峰值相对于原始风力机功率输出高3.7%,且顺风向推力也低于原始风力机。CFD software was used to simulate the vertical axis wind turbine of McMaster University, and the results showed that the calculated output power of wind turbine in different speed ratio of blade tip fitted well with wind tunnel experiment. Upward blade wake of wind turbine affected downstream blade aerodynamic characteristics, comparing with the model of wind turbine with single blade, the peak torque of blade was reduced, and the peak occurrence time was delayed. Comparing flow field of rotary blade with that of advection blade, the peak torque was significantly improved. The additional mass effect of blade was helpful to reduce the design strength of support bar of wind turbine, but the consolidation strength of blade and support bar were enhanced. When the blade was taken into virtual camber design, the revised wind turbine would produce 3.7% higher power than that of original model, meanwhile, the forward thrust of the turbine with virtual camber was smaller than the original model, too.

关 键 词：动态失速 尾流 附加质量 翼型弯度 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]