摘要
建立1.2 MW风力机三维模型并进行了数值模拟,基于Simple算法,采用SSTk-ε湍流模型,结合有限体积法对控制方程进行离散,并分析了其不同截面上的压力、速度及湍动能对风力机输出功率的影响.结果表明:叶片旋转与塔架的相互干扰引起风力机气动参数的变化,减小了风力机获得的转矩,导致风力机输出功率减小;塔架对风力机风场产生重要影响,导致塔架后方的湍动能变大,叶片中心涡、附着涡对风力机流场区域的影响较小;风轮和整机对风力机后方几百米区域的速度场产生影响,但速度场受整机影响的区域小于风轮的影响.
Based on the 3D model built up for a 1.2 MW wind turbine,numerical simulation was carried out using SST k-ε turbulence model,Simple algorithm and discrete equations established by finite volume method,so as to study how following factors influencing the wind turbine output power,such as the pressure,velocity and turbulent kinetic energy on different flow-field sections of the wind turbine.Results show that the mutual interference between rotary blade and tower frame may change the aerodynamic performance and reduce the available torque of wind turbine,which may therefore result in decreased output power of the wind turbine;the existence of tower frame plays an important role in influencing the flow field of wind turbine,but the region affected by central swirl and adhesive vortex is relatively small;the velocity field may be effected by both the wheel and the turbine up to a few hundred meters after the wind turbine,but the region affected by the turbine is smaller than by the wheel.
出处
《动力工程学报》
CAS
CSCD
北大核心
2011年第7期551-556,共6页
Journal of Chinese Society of Power Engineering
基金
吉林省科技发展资助项目(20080422)
关键词
风力机
塔架
流场
湍动能
输出功率
wind turbine
tower frame
flow field
turbulent kinetic energy
output power
