湍流条件下风力机翼型动态气动特性研究  

STUDY ON DYNAMIC CHARACTERISTICS OF WIND TURBINEAIRFOIL UNDER TURBULENT CONDITIONS

作　　者：郭兴铎 李银然[1,2] 李仁年 臧志昭[1] Guo Xingduo;Li Yinran;Li Rennian;Zang Zhizhao(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Provincial Technology Center for Wind Turbines,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]甘肃省风力机工程技术研究中心,兰州730050

出　　处：《太阳能学报》2024年第6期556-563,共8页Acta Energiae Solaris Sinica

基　　金：甘肃省优秀博士生项目(22JR5RA231);甘肃省高等学校产业支撑计划项目(2022CYZC-27);兰州理工大学优秀博士学位论文培育计划;甘肃省教育厅:优秀研究生‘创新之星项目2022CXZX-433’。

摘　　要：基于CDRFG方法生成湍流入口边界,采用大涡模拟(LES)研究湍流条件下风力机翼型的动态气动特性。结果表明:在翼型俯仰振荡过程中,相同攻角时,下俯过程的升力系数脉动较上仰过程更加明显。在湍流来流条件下,升力系数的分布相对紊乱,且带有不同幅度的突变特性,其脉动特性较均匀来流显著增加,迟滞环纵向波动范围增大,非定常特性加剧,且平均攻角越小,湍流对升力系数脉动特性的影响越明显。湍流对翼型表面压力波动的影响主要位于前缘区域,前缘点脉动压力对湍流来流的响应强烈,沿弦向逐渐往后,翼型表面脉动压力对湍流来流的响应逐渐减弱。In this paper,the turbulent inlet boundary is generated based on the CDRFG(Consistent Discretizing Random Flow Generation)method,and the unsteady characteristics of a pitch oscillating airfoil in turbulent flow is researched by using the large eddy simulation(LES).The results show that the fluctuation characteristics of lift coefficient in downward pitch process is more obvious than that in the upward pitch process at the same angle of attack during the pitch oscillation of the airfoil.Compared with the uniform flow,the distribution of lift coefficient is relatively disordered with different amplitude abrupt characteristics in turbulent flow,and the fluctuation characteristics of lift coefficient is more significant,the longitudinal fluctuation range of hysteresis loop increases,and the unsteady characteristics of lift coefficient is aggravated in the pitch oscillation process of the airfoil.In addition,the fluctuation characteristics of lift coefficient caused by turbulence is more significant at small average angles of attack than those at large average angles of attack.The influence of turbulence on the surface pressure fluctuation is mainly located in the leading edge region of the airfoil,and the fluctuation pressure at the leading edge point has a strong response to the turbulent flow.Going back along the chord of the airfoil,the response of the fluctuation pressure on the airfoil surface to the turbulent flow weakens gradually.

关 键 词：风力机 翼型 湍流 大涡模拟 空气动力学 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]