风力机叶片预弯技术的数值模拟  

NUMERICAL RESEARCHES OF THE WIND TURBINE BLADE' S PREFLEX TECHNOLOGY

作　　者：郭婷婷[1] 吴殿文[2] 张强[2] 李少华[2] 

机构地区：[1]北京国电龙源环保工程有限公司,北京100052 [2]东北电力大学能源与机械工程学院,吉林132012

出　　处：《太阳能学报》2011年第7期1020-1025,共6页Acta Energiae Solaris Sinica

摘　　要：对MATLAB编程得到的1.2MW风力机组叶片采用预弯处理,分别建立未预弯,预弯0.3、0.6及0.9m4种预弯尺寸的叶片并对其采用SST κ-ε湍流模型进行数值研究。对模拟结果进行比较分析,得到了预弯尺寸对风力机性能的影响及合理的预弯尺寸。结果表明:未预弯时风力机的输出功率大于设计功率,相对误差为2.48%;预弯0.9m时输出功率小于设计功率,相对误差为3.9%;预弯0.6m时输出功率相对设计功率的误差为0.0006%,风力机的输出功率表现出随叶片预弯尺寸增大而减小的特性,并呈非线性特征。In this paper, blades of a 1.2MW wind turbine were designed based on MATLAB programming by using the preflex method. Four blades were respectively designed by un-bended, and with the preflex sizes being 0.3, 0.6 and 0.9 meters, and the SST k-co turbulence model was adopted to simulate them. The optimum preflex size of the blade was selected after comparing the effects of the preflex sizes on the output power. The results shown that： the output power of un-bended turbine is larger than design power and the relative error is 2.48%, the 0.9 meter＇ s output is less than design power with the relative error of 3.9%, and the 0.6 meter＇s output approaches the design power with the relative error of 0.0006%. The output power of the wind turbine decreases following with the increase of the preflex sizes, and the characteristics is not linear.

关 键 词：风力机 叶片设计 预弯 数值模拟 

分 类 号：TM614[电气工程—电力系统及自动化]