| Leakage of an eagle flight feather and its influence on the aerodynamics |
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| 作者姓名： | 唐迪 刘大伟 杨茵 李阳 黄喜鹏 刘凯 |
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| 作者单位： | College of Mechanical Engineering;High Speed Aerodynamic Institute;Chengdu State-Owned Jinjiang Machine Factory |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant No.51705459);the Natural Science Foundation of Zhejiang Province,China(Grant No.LY20E050022). |
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| 摘 要： | We investigate how the barb of bird feathers is changed along both the rachis and barb.To investigate the microstructures and the mechanical behaviors of barbs,a series of barbs are manually cut from an eagle’s primary feather to observe the cross sections.Aλ-like cross section with a tiny hook is observed at the right feet at each section.Afterwards,a measurement of the setup system is developed to evaluate the leakage ratio of a feather followed by a numerical predicting approach based on the CFD method.It is found that the air leakage increases linearly against the pressure,and the predicted results coincide well with the experimental results.Finally,the influences of leakage of the flight feather on both steady and unsteady aerodynamics are studied.
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| 关 键 词： | biomaterial FEATHER LEAKAGE large prey microstructure barbules CROSS-SECTION AERODYNAMICS |
Leakage of an eagle flight feather and its influence on the aerodynamics |
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| Di Tang,Dawei Liu,Yin Yang,Yang Li,Xipeng Huang,Kai Liu.Leakage of an eagle flight feather and its influence on the aerodynamics[J].Chinese Physics B,2021(3). |
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| Authors: | Di Tang Dawei Liu Yin Yang Yang Li Xipeng Huang Kai Liu |
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| Institution: | (College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;High Speed Aerodynamic Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China;Chengdu State-Owned Jinjiang Machine Factory,Chendu 610043,China) |
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