不同工况下风力机翼型襟翼气动特性分析  

ANALYSIS ON PERFORMANCE OF DEFORMABLE TRAILING EDGE FLAP ON DIFFERENT WORKING CONDITIONS

作　　者：叶舟[1,2] 郝文星 丁勤卫[1] 李春 Ye Zhou Hao Wenxing Ding Qinwei Li Chun(School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《太阳能学报》2017年第9期2535-2543,共9页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51176129);上海市教育委员会科研创新项目(13YZ066);教育部高等学校博士学科点专项科研基金(博导)项目(20123120110008);上海市科委项目(13DZ2260900)

摘　　要：柔性尾缘襟翼(DTEF)因其对翼型气动性能的调控能力,被认为是降低叶片疲劳和局部载荷最具可行性的气动控制部件。通过对DTEF参数化建模,实现对DTEF柔性变形与控制。数值模拟DTEF在不同工况不同运动状态下气动特性的变化规律。结果表明:通过与实验值对比,采用RNG k-ε湍流模型并于襟翼周围布置跟随襟翼运动的边界层网格可较好地模拟襟翼静态及动态气动特性。对于静态气动特性,随着流动分离的加深,襟翼对升力系数的调控能力降低,对阻力系数调控能力增加。3种工况下襟翼动态气动特性均呈现出与静态特性不同的变化规律,且随摆动频率的增加差距增加,由襟翼摆动导致的非定常效应在风力机模拟中不应被忽视。考虑襟翼运动非定常效应,采用跟随风速变化的策略控制尾缘襟翼摆动可有效减缓非定常来流下翼型受力波动。As the deformable trailing edge flap （DTEF） has good control ability of airfoil aerodynamic performance, it is considered to be the most feasible component for aerodynamic performance control of wind turbine to reduce blade fatigue and local load. Through the DTEF model, parametric programming was adopted on DTEF model to accomplish airfoil trailing edge flap flexible deformation control. Numerical simulation was carried out to analyze the dynamic performance of DTEF on different working conditions and different swing frequencyies. It concludes that compared with experimental data, RNG k-8 turbulence model with the boundary layer grid moving with flap has a good accuracy. The control ability of DTEF to static lift coefficient was weaken and drag coefficient was enhanced along with the deepening of flow separation. According to static and dynamic performance analysis of flap, it indicted that unsteady effect resulted from motional flap should not be neglected in the simulation.

关 键 词：风力机翼型 尾缘襟翼 气动特性 计算流体力学 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]