雷诺数对气动弹片改善失速特性影响的数值研究
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摘要
以NREL S809为原始翼型,采用数值模拟方法得到不同雷诺数下各弹片角度对翼型气动性能的影响,并利用功率谱分析非定常流场气动参数的波动情况。结果表明:在不同雷诺数下,改善翼型气动性能的最佳弹片角度与攻角均近似呈线性关系;与低雷诺数相比,高雷诺数下流体对翼型表面有更强的贴附能力,使得对应攻角下最佳弹片的角度更小;高雷诺数时,在各攻角下弹片改善翼型气动参数波动的能力均较强,而低雷诺数时其能力明显减弱。
Taking the airfoil NREL S809 as an object of study,numerical simulations were conducted to investigate the effects of flap angles on the aerodynamic performance of the airfoil at different Reynolds numbers,while the aerodynamic parameters of unsteady flow field were analyzed with power spectrum.Results show that the optimal flap angles are approximately linear with respect to the angles of attack at different Reynolds numbers.The fluid has stronger attaching ability to the airfoil surface at higher Reynolds numbers,making the optimal flap angles get smaller at corresponding angles of attack.The flap at high Reynolds numbers has stronger ability to reduce the fluctuation amplitude of aerodynamic parameters than that at low Reynolds numbers.
Taking the airfoil NREL S809 as an object of study,numerical simulations were conducted to investigate the effects of flap angles on the aerodynamic performance of the airfoil at different Reynolds numbers,while the aerodynamic parameters of unsteady flow field were analyzed with power spectrum.Results show that the optimal flap angles are approximately linear with respect to the angles of attack at different Reynolds numbers.The fluid has stronger attaching ability to the airfoil surface at higher Reynolds numbers,making the optimal flap angles get smaller at corresponding angles of attack.The flap at high Reynolds numbers has stronger ability to reduce the fluctuation amplitude of aerodynamic parameters than that at low Reynolds numbers.
引文
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[2]丁勤卫,李春,叶柯华,等.风波流对多平台阵列浮式风机Spar平台运动特性的影响[J].农业工程学报,2016,32(21):223-229.DING Qinwei,LI Chun,YE Kehua,et al.Effect of wind,wave and current on movement characteristics of array of floating wind turbine Spar platform[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(21):223-229.
[3]杨阳,李春,缪维跑,等.湍流风场与地震激励联合作用下的风力机结构动力学响应[J].振动与冲击,2015,34(21):136-143.YANG Yang,LI Chun,MIAO Weipao,et al.Response of structural dynamic characteristics of wind turbine operating in turbulent wind combined with seismic motion[J].Journal of Vibration and Shock,2015,34(21):136-143.
[4]李春,叶舟,高伟,等.现代大型风力机设计原理[M].上海:上海科学技术出版社,2013.
[5]叶舟,郝文星,祖红亚,等.尾缘修剪对风力机翼型气动性能的影响[J].动力工程学报,2015,35(7):593-598.YE Zhou,HAO Wenxing,ZU Hongya,et al.Influence of trailing edge trim on aerodynamic performance of the wind turbine airfoil[J].Journal of Chinese Society of Power Engineering,2015,35(7):593-598.
[6]郝文星,叶舟,丁勤卫,等.柔性襟翼对风力机翼型气动性能的影响[J].动力工程学报,2016,36(6):473-479.HAO Wenxing,YE Zhou,DING Qinwei,et al.Influence of deformable trailing edge flap on aerodynamic performance of the wind turbine airfoil[J].Journal of Chinese Society of Power Engineering,2016,36(6):473-479.
[7]张磊,杨科,徐建中.涡流发生器对风力机专用翼型气动特性的影响[J].工程热物理学报,2010,31(5):749-752.ZHANG Lei,YANG Ke,XU Jianzhong.Effects on wind turbine airfoils by vortex generators[J].Journal of Engineering Thermophysics, 2010, 31(5):749-752.
[8] BELAMADI R,DJEMILI A,ILINCA A,et al.Aerodynamic performance analysis of slotted airfoils for application to wind turbine blades[J].Journal of Wind Engineering and Industrial Aerodynamics,2016,151:79-99.
[9] GAITONDE D,VISBAL M,ROY S.Control of flow past a wing section with plasma-based body forces[C]//36th AIAA Plasmadynamics and Lasers Conference,Fluid Dynamics and Co-located Conferences.Canada:AIAA,2005.
[10] SHYY W,JAYARAMAN B, ANDERSSON A.Modeling of glow discharge-induced fluid dynamics[J].Journal of Applied Physics,2002,92(11):6434-6443.
[11] MEYER R,HAGE W,BECHERT D W,et al.Separation control by self-activated movable flaps[J].AIAA Journal,2007,45(1):191-199.
[12] SCHLUTER J U.Lift enhancement at low Reynolds numbers using self-activated movable flaps[J].Journal of Aircraft,2010,47(1):348-351.
[13]靳允立,胡骏.翼型失速及雷诺数变化对风力机气动性能影响的数值研究[J].太阳能学报,2009,30(9):1280-1285.JIN Yunli,HU Jun.Numerical research of the influence of airfoil stall and Reynolds number change on wind turbine aerodynamic performance[J].Acta Energiae Solaris Sinica,2009,30(9):1280-1285.
[14]靳允立.三级风扇数值优化及二维翼型失速流动和雷诺数影响研究[D].南京:南京航空航天大学,2008.
[15]李春,叶舟,高伟,等.现代海陆风力机计算与仿真[M].上海:上海科学技术出版社,2012.
[16]丁欣硕,焦楠.FLUENT14.5流体仿真计算从入门到精通[M].北京:清华大学出版社,2014.
[17]邱静,王国志,李玉辉.基于STAR-CCM+的简单流体模型CFD研究[J].液压气动与密封,2010,30(10):8-10.QIU Jing,WANG Guozhi,LI Yuhui.A simple fluid model for CFD research based on STAR-CCM+[J].Hydraulics Pneumatics&Seals,2010,30(10):8-10.
[18]张明锋,杨国伟,郑冠男,等.基于任意多面体网格的Navier-Stokes方程并行求解器[J].科学技术与工程,2016,16(18):101-105,139.ZHANG Mingfeng,YANG Guowei,ZHENG Guannan,et al.A parallel solver for Navier-Stokes equation based on arbitrary polyhedral grids[J].Science Technology and Engineering,2016,16(18):101-105,139.
[19] LI Y E,PAIK K J,XING T,et al.Dynamic overset CFD simulations of wind turbine aerodynamics[J].Renewable Energy,2012,37(1):285-298.
[20]孟龙,何炎平,赵永生,等.上风向水平轴风力机塔影效应数值模拟[J].中国科学:物理学力学天文学,2016,46(12):37-43.MENG Long,HE Yanping,ZHAO Yongsheng,et al.Numerical simulation of tower shadow effect of upwind horizontal axis wind turbine[J].Scientia Sinica(Physica,Mechanica&Astronomica),2016,46(12):37-43.
[21]胡岳,张涛.分离涡流场数值仿真的参数影响研究[J].机械工程学报,2016,52(12):165-172.HU Yue,ZHANG Tao.Research on the effects of numerical simulation parameters of separation vortex flow field[J].Journal of Mechanical Engineering,2016,52(12):165-172.
[22] KOZAK P A,VALLVERDU'D,REMPFER D.Modeling vertical-axis wind-turbine performance:blade-element method versus finite volume approach[J].Journal of Propulsion and Power,2016,32(3):592-601.
[23] WOLFE W P,OCHS S.CFD calculations of S809aerodynamic characteristics[C]//35th Aerospace Sciences Meeting and Exhibit,Aerospace Sciences Meetings.Reno,USA:AIAA,1997.