【作者】 于国亮；

【导师】 申振华；

【作者基本信息】 沈阳航空工业学院 ， 航空宇航推进理论与工程， 2008， 硕士

【摘要】 本文对大型风力机某型叶片翼型进行了研究并进行了重大修改。本文系统的介绍了风力机的基本理论以及翼型和风轮的几何参数、空气动力学特性等基本问题,并且也介绍了有关风力机叶片数值模拟的数学物理基础和方法。通过对风力机工作原理的分析,我们提出了利用增大叶片弯度和失速延迟效应的方法来提高风力机效率的新型技术,增大叶片弯度的主导思想是风力机叶片翼型的涡轮化,而失速延迟应用的主导思想是利用风力涡轮的三元旋转效应。本文通过FLUENT软件分别对原型叶片、大弯度叶片和失速延迟叶片进行三维数值模拟计算。计算结果表明,叶片形状对风力机性能有重要影响:在进行计算的五个攻角来看,两种技术都可以明显提高风力机的性能。总体而言,增大叶片弯度和失速延迟这两种技术都可以增加风力机的输出功率,是具有很好前景的新型技术,对于风力机的研究和设计具有重要的参考价值。更多还原

【Abstract】 The investigations of wind turbine aerodynamic performances with certain large-scale blades and its modified configurations were made in this paper;This paper describes some basic theories of wind turbine, and basic issues of airfoils and blade which include the geometry parameters, aerodynamic parameters and so on, and then introduces the mathematical and physical foundations and methods of wind turbine’s blade numerical stimulation. Through the analysis of work principle of the wind turbine, we advance two new techniques to enhance the efficiency of wind turbine:increasing the camber of the blade and using the stall delay effect .The guiding idea of increasing the camber of the blade is that the aerofoil of the wind turbine is modified toward the“turbine-like”aerofoil, while the guiding idea of using the stall delay effect is how to effectively utilize the wind turbine’s 3D rotating effect.This paper use the software FLUENT to simulate numerically effects of the big camber and stall delay on the wind turbine performances. The results at five attack angles show that the shapes of blade have very important effects on the performance of wind turbine: the two new techniques can improve the performance of the wind turbine distinctly. On balance, the two techniques of increasing the camber of the blade and using the stall delay effect can increase the power of wind turbine, which are new techniques that have wonderful future.更多还原