摘要
提出一种新型的垂直轴螺旋风力叶片,分析叶片附近的流动特征与叶轮力矩特性之间的关联。采用计算流体动力学(CFD)方法,运用Spalart-Allmaras湍流模型,对两叶片叶轮内外的三维湍流流动进行数值计算。分析设计风速下的叶轮力矩系数;在来流速度为4m/s的低风速条件下,对最大力矩系数工况和最小力矩系数工况下的流动参数分布和空间流动结构进行对比研究。研究结果表明:该叶轮的力矩特性较好;叶片两侧的压差和大尺度低压区的位置是影响该叶轮运行特性的两个重要因素;叶片附近的流动具有明显的三维空间结构。
A new vertical-axis spiral wind blade was proposed. The relation between flow characteristics around the blade and torque property of the blade was studied. With computational fluid dynamics （CFD） technology and Spalart-Allmaras turbulence model, three-dimensional flows inside and outside the two-blade rotor were numerically simulated. The torque coefficient under rated wind speed was analyzed. At upper stream velocity of 4m/s, flow parameter distributions under maximum and minimum torque cate that torque property of the presented rotor is satisfying coefficient conditions were compared. The results indi- cate that torque property of the presented rotor is satisfying. Pressure difference between pressure and suction sur-faces of the blade, position of large-scale low-pressure zone are two critical factors affecting torque production.Flows around the blade are evident three-dimensional spatial flow patterns. The study provides helpful references for further improvement and aerodynamics analysis of Savonius rotor.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2011年第12期1777-1784,共8页
Acta Energiae Solaris Sinica
关键词
垂直螺旋叶片
隔板
端盖
数值计算
流场
力矩性能
vertical-axis spiral blade
middle plate
end plate
numerical simulation
flow field
torque property
