三维动态失速模型在风力机气动特性计算中的应用  

Application of 3-D Dynamic Stall Model in Wind Turbine Aerodynamic Performance Prediction

作　　者：吕超[1] 王同光[1] 许波峰[1] 

机构地区：[1]南京航空航天大学江苏省风力机设计高技术研究重点实验室,南京210016

出　　处：《南京航空航天大学学报》2011年第5期707-712,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家重点基础研究发展计划("九七三"计划)(2007CB714600)资助项目;江苏高校优势学科建设工程资助项目

摘　　要：为了适应风力机叶片的大展弦比、旋转和只有单侧叶尖涡的特点,对已建立的适用于小展弦比直机翼的三维动态失速模型进行了一系列的修正,然后用于风力机三维非定常气动特性计算。该动态失速模型所必须的气动输入参数将由动量叶素理论方法计算得到。本文将动量叶素理论、三维动态失速模型、三维旋转效应模型适当耦合起来,获得了风力机叶片的三维非定常气动特性计算方法。应用上述方法计算得到了不同工况下的风力机叶片各截面的非定常气动载荷结果,并与风洞实验结果以及用二维动态失速模型计算的结果进行比较,对计算方法和计算结果进行了详细的分析和讨论。本文模型相比于二维模型,能够更好地仿真风力机叶片的三维动态失速气动特性,尤其在叶片外部截面效果更佳。A 3-D dynamic stall model based on a low aspect ratio rectangular wing is modified for the rotating wind turbine blade with high aspect ratio.Only one tip vortex is trailed and is appropriately coupled with the blade element theory and 3-D rotational effect model for the calculation of both the wind turbine gross performance and 3-D unsteady aerodynamic airloads in different flow environments.The comparison between the calculated results and the experimental data demonstrates that the wind turbine unsteady aerodynamic performance prediction is improved when the 3-D dynamic stall model is included.For completeness,both the scheme and the calculated results are discussed.It is demonstrated that the 3-D dynamic stall characteristic of the wind turbine blade is simulated better by the propose model than by other models.

关 键 词：非定常空气动力学 风力机 三维动态失速 分离流 涡运动 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]