摘要
以三叶片水平轴风力机为研究对象,建立了尾迹扩张模型,研究了叶片尾迹流动结构。涡面模型叶片无量纲环量的计算结果与经典环量数据对比,结果吻合较好。计算了根尖涡模型风轮面诱导速度随尾迹扩张系数的变化关系,得出了尖速比对气动性能的影响:推力系数与环量及尖速比成正比;对于不同环量,功率系数存在最佳尖速比。分析了尾迹扩张模型对气动性能的影响:推力系数和功率系数与尾迹扩张系数成正比,尾迹收敛参数对其影响甚微。
Tip-Root and vortex sheet configuration of prescribed vortex wake model were used to predict the aeroperfor -mance based on lifting line theory.For three blade horizontal axis wind turbine , the wake structure was constructed by introducing a wake expansion model .Reproduced non-dimensional circulation along the blade of vortex sheet configura -tion agrees well with the classical Goldstein Function .The calculated results of Tip-Root configuration showed the regu-larity of rotor plane induced velocity changing as wake expansion ratio varied .It’s demonstrated that thrust coefficient was proportional to circulation and tip speed ratio , and optimal power coefficient comes with the best tip speed ratio for different circulation.Thrust coefficient and power coefficient was proportional to wake expansion rate , while wake con-vergence parameter had little impact .
出处
《能源工程》
2014年第4期10-14,18,共6页
Energy Engineering
基金
国家自然科学基金资助项目(E511176129)
上海市教育委员会科研创新(重点)项目(13ZZ120)
教育部高等学校博士学科点专项科研基金(博导类)项目(2012312011008)
关键词
预定涡尾迹
诱导速度
环量
气动性能
prescribed vortex wake
induced velocity
circulation
aerodynamic performance
