座头鲸胸鳍前缘仿生叶片空气动力学特性研究  

AERODYNAMIC CHARACTERISTICS OF BIONIC WING OF LEADING-EDGE OF HUMPBACK WHALE FLIPPER

作　　者：张照煌[1] 李魏魏 ZHANG Zhao-huang;LI Wei-wei(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《工程力学》2020年第S01期376-379,386,共5页Engineering Mechanics

基　　金：中央高校基本科研业务费专项资金项目(2019QN021)。

摘　　要：仿生学是人类借鉴生物进化成果推进技术进步理论创新的一个重要源泉^([1-3])。座头鲸胸鳍独特的凸凹前缘可以改变胸鳍上流体的流动状态,进而展现优秀的力学特性。因此,座头鲸胸鳍仿生在流动控制及叶片增效方面有着极大的研究价值。该文通过图像处理方式获得座头鲸胸鳍外形,建立以NACA 63_4-021翼型为截面的叶片;通过研究叶片空气动力学性能及叶片涡量分布分析凸凹前缘对叶片的影响。由于凸凹前缘产生的脱体涡,仿生叶片升力系数和升阻比优于对比模型。Bionics is an important way for human being to use the achievement of biological evolution to promote theoretical innovation and technology progress.The leading-edge of humpback whale flipper is considered to improve dynamic performance through affect fluid flow.The exact leading-edge of humpback whale flipper can be obtained by image processing.The wing is established by the edge and the NACA 634-021 airfoil to study aerodynamic characteristics.And the effect of convex and concave leading edge on blade is analyzed by studying the aerodynamic performance of blade and the vorticity distribution of blade.The bionic wing aerodynamic evaluation indicates that lift coefficient and lift-drag ratio are superior to those of comparative models.

关 键 词：座头鲸胸鳍 凸凹前缘 脱体涡 仿生叶片 图像处理 

分 类 号：O355[理学—流体力学] TP391.41[理学—力学]