【作者】 徐贵营；

【导师】 黄争鸣；

【作者基本信息】 同济大学 ， 固体力学， 2008， 硕士

【摘要】 叶片是风力机中技术含量最高,也是最重要的部件之一。叶片的气动外形直接决定了风力机效率,因此设计具有良好气动外形的叶片是风力机设计的关键。本论文共分为五个章节:第一章简要介绍风能的发展现状以及本课题研究目的与内容;第二章主要阐述风力机气动设计相关理论;第三章对NREL-20KW叶片进行优化设计与分析,确定叶片的最佳安装角度和最佳转速,提高叶片的气动效率,降低发电成本;第四章利用叶素--动量定理(BEM),参照相应的技术标准和自主设计的叶片结构铺层,概念设计1500KW叶片的气动几何外形,使用GH BLADED软件对其气动性能进行评估。使用PRECOMP程序计算两种不同铺层结构叶片的截面特性参数,分析叶片模态和正常运转下的叶尖挠度变形;第五章为结论,并对今后的研究提出了展望。通过对设计结果的分析发现上述分析设计方法,在叶片的气动设计与分析中有良好的表现,能有效的提高发电效率、降低发电成本。对叶片气动设计改进也有很好的理论指导作用。获得截面特性参数也为下一阶段更为全面的结构分析提供必要数据。更多还原

【Abstract】 The blade is one of the highest technical content and the most important parts for wind turbine. The aerodynamic shape decides the wind turbine efficiency directly. So it is the key point for the wind turbine to design blade with better aerodynamic shape.This thesis is divided into five parts.The first chapter gives a brief introduction for development situation of wind energy and research purpose & contents of this subject.The second chapter mainly explains the aerodynamic design theory of the wind turbine.In order to improve aerodynamic efficiency of a 20KW wind turbine blade, available from NREL’s design, in the third chapter it is analyzed and re-designed and its optimal pitch angle and rotor speed can be also obtained by the PROPID program.In the fourth chapter based on BEM theory and technical standard, the aerodynamic shape concept design of 1500KW blade is done and aerodynamic performance is evaluated through the GH BLADED software. According to the characteristics of the canulate blade, conventional fiber laminas structure is not suitable and need to be re-designed to meet the new type blade structure characteristics. Sectional characteristic parameters of all the sections which are appointed in the thesis are calculated for both different fiber laminas structure blades. In the last of this chapter the blade mode and tip deflection are analyzed under running normally.Finally, we summarize the work of the thesis and discuss some future research directions of the work.The above design and analysis methods are well applicable to the aerodynamic shape of the wind turbine blade. The generating efficiency of the optimized blade can be improved effectively, so generating cost can be reduced considerably. These methods are also useful to improve design level and shorten design period. The data of every sectional characteristic parameter is also required for the next stage comprehensive structure analysis.更多还原