考虑层流分离的低速风力机翼型气动性能研究  

Study on Aerodynamic Characteristics of Low-speed Wind Turbine Airfoil in Consideration of Laminar Separation

作　　者：唐新姿[1] 黄轩晴 孙松峰[1] 彭锐涛[1] 

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105

出　　处：《动力工程学报》2017年第1期52-59,共8页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51305377;51375417)

摘　　要：以风力机DU93-W-210翼型为研究对象,采用数值计算与实验验证方法研究了低雷诺数(2×105~5×105)下翼型升阻气动性能,基于修正转捩模型分析了多雷诺数多攻角下翼型层流分离泡对气动性能的影响.结果表明:基于四方程转捩模型Transition SST计算所得升阻力系数及翼型表面转捩位置与实验值接近,低雷诺数流动计算适用性较好;雷诺数越小,翼型层流分离泡越明显,翼型升阻比越小;失速前雷诺数对翼型升阻比影响较大而失速后影响较小,且雷诺数越小该翼型失速越缓和;攻角越大,翼型上表面层流分离泡越靠近前缘而下表面越靠近尾缘;失速前上表面和下表面转捩位置均呈线性变化,失速后上表面转捩位置呈非线性变化.The aerodynamic characteristics of DU93-W-210 wind turbine airfoil were studied at low Reynolds numbers （2× 10^5-5 × 10^5） through numerical simulation and experimental tests, so as to analyze the effect of laminar separation bubble on the airfoil aerodynamic characteristics using corrected transition model at different Reynolds numbers and different angles of attack. Results show that the corrected Tran- sition SST turbulence model predicts the lift and drag coefficients as well as the transition location well compared to experimental results at low Reynolds numbers; the lower the Reynolds number is, the more obvious the laminar separation bubble and the smaller the lift-drag ratio will be; the effect of Reynolds number on the lift-drag ratio of airfoil is evident but less obvious when stall exists, and the stall is softer at lower Reynolds numbers; at larger angles of attack, the laminar separation bubble on the upper surface of airfoil is closer to the leading edge, while that on the lower surface is closer to the trailing edge; the transition position on the lower and upper surface both moves in a linear manner before stall, and the transition position on the upper surface moves in a non-linear manner after stall.

关 键 词：风力机翼型 低雷诺数 层流分离 气动性能 数值模拟 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]