摘要
为探寻三维可变形翼展向变形对其气动力特性的影响规律,采用基于求解RANS方程的方法,结合k-ε湍流模型,进行三维可变形翼定常状态下静态展向变形和非定常状态下动态展向变形气动力特性及变化规律的数值模拟研究。通过开展不同攻角和不同变形幅度下的静态展向可变形翼系列模型、以及以不同变形频率和不同变形幅度做动态展向变形运动的可变形翼模型的数值计算,分别获得可变形翼静态展向变形和动态展向变形时升/阻力系数随各输入参数的变化情况。结果表明:静态展向变形对三维机翼气动力性能略有影响,影响程度与攻角有关;动态展向变形下机翼阻力系数和升力系数时历变化规律呈类余弦曲线形式,变化幅度均随着展向变形频率的增大而增大,且展向变形幅度越大,变化幅度越明显。研究结果可为展向变形翼的气动力性能预报以及优化设计提供技术支撑。
In order to explore the influence of spanwise deformation on the aerodynamic characteristics of three-dimension deformable airfoils,the numerical simulation of the static spanwise deformation and the dy⁃namic spanwise deformation were carried out based on RANS equation and k-εturbulence model.Through the numerical calculation of a series of static spanwise deformable airfoils with different attack angles and de⁃formation amplitudes,and dynamic spanwise deformable airfoils with different deformation frequencies and deformation amplitudes,the change of drag coefficient and lift coefficient with each input parameter of the static and dynamic spanwise deformation was obtained respectively.Results show the static spanwise defor⁃mation has a slight effect on the aerodynamic performance of three-dimensional airfoils,and the influence de⁃gree is related to the angle of attack.The drag coefficient and lift coefficient change in cosine like form under the dynamic spanwise deformation,the variation amplitude increases with the increase of spanwise deforma⁃tion frequency,and the larger the spanwise deformation amplitude is,the more obvious the variation ampli⁃tude is.The research can provide a guidance for aerodynamic performance prediction and optimal design of spanwise deformation airfoils.
作者
陈默
张楠
郑文涛
李永成
CHEN Mo;ZHANG Nan;ZHENG Wen-tao;LI Yong-cheng(China Ship Scientific Research Center,Wuxi 214082,China)
出处
《船舶力学》
EI
CSCD
北大核心
2022年第10期1420-1432,共13页
Journal of Ship Mechanics
基金
装备预研一般基金项目(61402070303)
装备预研国防水动力学重点实验室基金项目(JCKY2018207CA02)。
关键词
三维可变形翼
展向变形
气动力特性
数值模拟
3D deformable airfoil
spanwise deformation
aerodynamic characteristics
numerical simulation
