摘要
针对风力机专用S832翼型绕流流动建立了二维不可压缩湍流模型,利用计算流体力学软件Fluent,分别选用S-A、RNGk-ε两种湍流模型对S832进行数值模拟,对比了两种湍流模型对气动模拟精度的影响,得出了雷诺数为3×106时,该翼型在-16°～30°攻角下的升力系数和阻力系数随来流攻角的变化关系及压力分布图,分析了不同攻角下翼型表面压力分布特性并进一步预测了大攻角(达30°)下翼型分离流动特性,并与NREL的试验数据进行比较,研究结果表明:RNGk-ε在预测该翼型小攻角范围气动性方面更加有效。
Two-dimensional incompressible turbulence model is built for the flow around S832 airfoil, a special-purpose airfoil for HAWTs. The numerical simulation on S832 using S-A ,RNGk- ε turbulent models is made by the CFD software Fluent, the effects on aerodynamic simulation accuracy under these two turbulence models are contrasted, the lift and drag coefficients characteristics which vary with attack angle from -16° to 10° and pressure distribution are obtained when Re equals 3 ×10^6, the surface pressure distribution characteristics of airfoil surface at different attack angle are analyzed, the separated flow characteristics at large angle of attack （as large as 30 degree）are predicted, compared them with NREL＇ s aerodynamic data, results show that RNGk-ε turbulence modelis more effective in predicting aerodynamic performance of the special-purpose airfoil for HAWTs.
出处
《电网与清洁能源》
2009年第9期41-44,共4页
Power System and Clean Energy
关键词
S832翼型
气动性能
分离流
湍流模型
S832 airfoil
aerodynamic performance
separated flow
turbulence model
