摘要
为准确模拟风力机高风速偏航工况下的气动特性,以NREL Phase VI实验叶片为算例,考虑叶片旋转导致的失速延迟现象,通过Kirchhoff-Helmholz尾缘分离预估模型与Du-Selig失速延迟模型建立三维尾缘分离预估模型,并与升力面自由涡尾迹法耦合。以更精确预测分离点位置和附着涡诱导速度,讨论叶片弦向布置的涡格数量对计算准确性的影响。对比改进前后的升力面模型模拟叶片在高风速下不同偏航角工况的气动性能,结果表明:改进后升力面模型可大幅提高高风速气动性能预测的准确度,两涡格三维尾缘分离预估模型对法向力系数和弦向力系数的模拟最为精确。
In order to simulate aerodynamic performance of wind turbine under high wind speed and different yaw angles accurately. The NREL Phase VI experiment is numerical example. Take stall delay resulted by blades rotation into consideration. Based on lifting surface free wake method, the coupling model of Kirchhoff-Helmholz trailing edge separation prediction model and Du-Selig 3D static stall delay model is introduced. The influence of vortex lattice numbers to calculation accuracy is discussed, with more accurate trailing edge separation position and bound wake induced velocity. The Kirchhoff-DuSelig coupling model is compared with the original Weissinger-L model on simulating high wind speed aerodynamic performance under different yaw angles. The result showed that the improved lifting surface model increases simulation accuracy significantly. And the set of two vortex lattices on the lifting surface gets the best simulation of normal force coefficient and tangent force coefficient.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2017年第5期1316-1323,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(E51176129)
上海市教育委员会科研创新(重点)项目(13ZZ120
13YZ066)
教育部高等学校博士学科点专项科研基金(博导类)(20123120110008)
关键词
水平轴风力机
自由涡尾迹
尾缘分离
失速延迟
horizontal axis wind turbine
free wake method
trailing edge separation
stall delay
