摘要
采用Fluent 6.3软件,并结合SSTk-ω模型对1.2 MW风力发电机旋转风轮流场进行了数值模拟,对设计转速为18.44 r/min工况下三叶片风轮与相同叶片单叶片、双叶片以及四叶片风轮流场的输出功率与湍动能进行了比较,并分析了风轮旋转对叶片间流动的影响.结果表明:旋转上游叶片在转动过程中会发生附着涡的脱落,导致旋转下游叶片周围流场的环境发生变化,对叶片转矩及输出功率造成较大影响.在翼型优化中,考虑叶片间作用可以提高风力发电机的效率.
Numerical simulation has been performed on flow field of rotating wind wheel for a 1. 2 MW wind turbine using Fluent 6.3 software and SST κ-ω model, so as to compare the power output and turbu- lent kinetic energy of various flow fields among single-, two-, three- and four-blade rotors at the design speed of 18.44 r/min, and subsequently analyze the influence of wheel rotation on flow field of blade. Resuits show that vortex shedding from up-stream rotating blades frequently occurs during operation, which may lead to alteration of the flow field around down-stream rotating blades, hence the blade torque and power output are greatly affected. The wind turbine efficiency may be improved via airfoil optimization by considering the interaction of various blades.
出处
《动力工程学报》
CAS
CSCD
北大核心
2011年第9期705-708,714,共5页
Journal of Chinese Society of Power Engineering
关键词
风力发电机
风轮
气动性能
紊流模型
数值模拟
wind turbine
wind wheel
aerodynamic performance
turbulence model
numerical simulation
