摘要： 世界上最重要的能源形式是煤炭、石油、化石能源、核能和可再生能源，太阳能。然而，人类可以使用的化石资源是有限的，对能源的需求持续增长，平均而言，近年来平均增长了5%，这导致了能源供应和需求之间的矛盾日益加剧。不及时调整以化石燃料为主要能源结构,不可避免地形成积累数亿年前,地球的化石遗留的挖掘、消费,这将导致有限的化石能源枯竭,人类生态环境恶化的恶性循环,经济、能源和环境的协调发展。

中国后来发展了风能，但发展得更快。自1990年代以来,电网装机容量的增长了约30%,到2014年底,中国的装机容量是764 .37mw,占总量的17%的电力来自中国,和你的产量相当于总产量的08%。与像美国和欧洲这样的国家相比，中国的风能生产已经落后，需要加快步伐。中国已经确定了其发展风能计划的目标，该计划预计到2020年将有3亿兆瓦的风能。

为了改善我国风力发电企业的发展，必须对风力机的设计和分析进行深入的国家生产。这段,基于传统方法设计的叶片,活在一个2兆瓦风力机叶片并生成一个三维几何模型,然后利用有限叶片的振动仿真模拟器,振动的频率和类型的振动,可以避免共振的基本要求。

关键字： 尖速比；叶片的结构；垂直轴风力发电机；迎风阻力;升力；

Vertical axis wind turbine design

Abstroct：A main forms of energy in the world are coal, fossil fuels dominated by oil, nuclear energy, renewable energy and solar energy. However, the available fossil resources are limited and the demand for energy is increasing. In recent years, the average growth rate of 5% has led to an increase in the contradiction between energy supply and demand. If not adjust to the fossil energy as the main body of the energy structure as soon as possible, is bound to form the earth's fossil heritage of hundreds of millions of years the accumulation of more large-scale mining, consumption, thus will lead to limited fossil energy depletion, a vicious cycle of human ecological environmental degradation, energy and the environment.

China's wind power is late, but it is growing faster. Since the 1990 s, the grid wind power installed capacity increase by about 30% a year on average, by the end of 2014, China's wind power installed capacity of 764.37 mw, scale accounts for 0.17% of the force in China's size, its production accounted for 0.08% of total power. Compared with other countries, such as the us and Europe, China's wind power is still very backward and must be accelerated. China has a wind power plan and plans to have a wind power capacity of 30000MW by 2020.

In order to better develop China's wind power generation and realize the positioning of wind turbine, we must study the design and analysis of wind turbine. In this paper, based on the traditional design method of blade design 2 mw wind turbine blades, and generates a 3 d geometric model, then using finite element simulation of blade vibration modal analysis, obtained the vibration frequency and vibration model, in order to prevent resonance structure provides the basis.

Keywords： Blade structure ；Wind resistance ；Darrieus；Wind turbine；

目录

引言1

1 中国风能的发展及现状 2

1.1 世界及我国风力发电发展现状2

1.2 新型垂直轴风力发电机发展概况4

2 风力发电机的垂直轴叶片   5

2.2 垂直轴发电机叶片种类5

2.2叶片分析       5

2.3 风力机叶片的材料和设计  5

2.4风力机叶片的制造  6

3 风力发电机应用到的理论基础6

3.1 风力发电机的基本理论6

3.2 贝茨(Betz)理论.6

3.3 叶素理论.6

4 方案论证6

4.1 设计方法6

4.2风能利用率6

4.3启动风速6

4.4风力机的效率           6

4.5 叶片厚度及弦长比6