摘要： 消耗能源的使用频繁使新能源发展得到了快速发展，风能是大家所接受的新能源类型之一。这几年开始关注垂直轴风力机大家，因为目前还没有市场化的小功率机型得到普遍的应用。风力发电机的叶片是关键部分之一，因为它的良好气动性能可以使风力发电机得到较高风能利用率；叶片优秀的结构性能使风机能够安全节能运行，这也能最大程度的使叶片生产成本降低。本文使具有较好气动性能叶片的基础上，进行水平轴风力发电机和垂直轴风力发电机的对比优缺特点，设计了好几种适用于小功率垂直轴风力发电机的叶片结构。希望小型叶片以较低的风速启动，以大的扫风面积获得高的功率，以满足家庭供电的使用。其中至关重要的是新的结构设计方案。68729

毕业论文关键字： 垂直轴；风力发电机；达里厄；叶片结构

Design of the Vertical Axis Wind Turbine

Abstract： The energy crisis has promoted the development of new energy resources, and the wind energy has become one of the new energy sources. In recent years, the vertical axis wind turbine began to attract attention, the moment is not mature small power models have been widely used. The blade is one of the key components of wind turbine and its good dynamic performance is to obtain high wind energy utilization rate is guaranteed to fan; the good structure performance is to ensure safe and normal operation of the fan, also can maximum reduce the blade production cost. This paper has advantages and disadvantages better aerodynamic performance based, compared to the horizontal axis wind turbine and vertical axis wind turbine in leaves, design some suitable for small power straight bladed vertical axis wind turbine blade structure. Small blades are hoped to start at a low wind speed, with a large sweep area to obtain a high power to meet the use of household power supply. One of the most important is the new structure design.

Keywords： Vertical axis；Wind turbine；Darrieus；Blade structure  

目录

引言 1

1 风能发展概况 2

1.1 世界及我国风力发电发展现状 2

1.2 小型垂直轴风力发电机发展概况 4

2 风机基本类型和参数 5

1 风机基本类型 5

2 比较 5

2．1 水平轴风机与垂直轴风机的比较 5

2．2 垂直轴风机S型，H型和φ型的比较 6

3 叶片设计 7

3.1 风特性 8

3.1.1 风能量 8

3.1.2 湍流特性 9

3.2 垂直轴风力机空气动力学 10

3.3 攻角α和叶尖速比λ的计算和分析 10

3.3.1 计算方法 11

3.3.2 计算和分析 13

3.3.3结论 14

3.4 风能利用率 15

3.5 贝茨极限 15

3.6 风力机的功率及扭矩计算 17

3.7 叶片实度 19

3.8 叶片的材料 20

3.9 叶片截面设计方法 21

3.9.1 各种设计模型