摘要
本文采用CFD数值模拟方法研究了H型垂直轴风力机基于动态变桨条件下的二维非定常黏性绕流场。以一个三叶片H型风力机的实验模型为研究对象,采用笛卡尔动网格方法,选用SST湍流模型。叶尖速比分别为2.15和2.27,将动态变桨条件下模拟得到的风力机的功率系数与常规无变桨条件下的模拟结果进行了比较。讨论了单个叶片和风轮总载荷沿周向的变化规律,详细分析了一个旋转周期内二维非定常涡量场的变化,揭示了动态变桨后风力机气动载荷提高的原因。
The two-dimensional unsteady viscous flow of H type vertical axial wind turbine with pitch angle changing is numerically investigated by using CFD numerical simulation method in this paper.An experiment model with three blades of H type wind turbine is selected;Cartesian grid dynamic simulation method and SST turbulence model are used.Power coefficients with tip ratios2.15 and 2.27 are compared in the condition of pitch angle changing and without pitch angle.In addition,variation of loads of single and three blades with azimuth is investigated.Two-dimensional unsteady flow details through vortices contours with azimuth in one rotation cycle are analyzed.The cause of the wind turbine aerodynamic load increased after pitch angle changing is revealed.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2015年第3期501-504,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金项目(No.51176046
No.51206052)
国家863高技术研究发展计划(No.2012AA051303)
关键词
H型垂直轴风力机
气动特性
数值模拟
动态变桨
H type vertical axial wind turbine
aerodynamic performance
numerical simulation
pitch angle
