水平轴风力机叶片气动性能计算及影响因素分析

摘要

The blade is one of the key components in the wind generator,which design and reliability affects directly the safety of the wind generator operation, while blade's aerodynamic performance also affects directly the design of blade shape and the unit efficiency.So it is necessary to conduct aerodynamic performance computing and numerical simulation for bladeAccording to the theory of Bladed element-momentum,a model of aerodynamic calculations for the blade of wind turbine is created-Considering the influence factors on pneumatic tip loss,wheel hub loss,blade of width and thickness,the model is further modi-fied.Then the computer program is compiled by MATLAB language and the aerodynamic performance of a blade with specific airfoil is calculated.Moreover,the influences factors on the aerodynamic performance of the blade such as the density of the wind wheel,installation angle,yaw angle,are also analyzed.%叶片作为风电机组的关键部件之一,其设计和可靠性直接关系到风力发电机组的安全运行,而气动性能的好坏将会直接影响到叶片外形设计及机组效率.因此,对叶片进行气动性能计算和数值模拟成为必要.根据动量叶素理论建立风力机叶片气动计算模型,考虑到叶尖损失,叶根损失,叶片宽度和厚度等因素的影响对该模型进行修正.用MATLAB语言编制计算程序,针对某一具体翼型数据进行了气动性能的计算,分析了风轮实度、安装角、锥角以及偏航等因素对叶片气动性能的影响.