Biomimetic Drag Reduction Study on Herringbone Riblets of Bird Feather

作     者：Huawei Chen Fugang Rao Xiaopeng Shang Deyuan Zhang Ichiro Hagiwara 

作者机构：School of Mechanical Engineering and Automation Beihang University Beijing 100191 P. R. China Department of Mechanical Science and Engineering Tokyo Institute of Technology Tokyo 152-8550 Japan 

出 版 物：《Journal of Bionic Engineering》 (仿生工程学报（英文版）)

年 卷 期：2013年第10卷第3期

页      面：341-349页

核心收录：

学科分类：0710[理学-生物学] 0820[工学-石油与天然气工程] 07[理学] 08[工学] 082003[工学-油气储运工程] 071002[理学-动物学] 

基　　金：国家自然科学基金 NSFC Major Program 

主　　题：biomimetic surface drag reduction herringbone riblets bird feather 

摘      要：Birds have gradually formed various excellent structures such as streamlined shape and hollow shaft of feather to improve their flying performance by millions of years of natural selection. As typical property of bird feather, herringbone riblets align along the shaft of each feather, which is caused by perfect link of barbs, especially for the primary and secondary feathers of wings. Such herringbone riblets of feather are assumed to have great impact on drag reduction. In this paper, microstructures of secondary feathers of adult pigeons are investigated by SEM, and their structural parameters are statistically obtained. Based on quantitative analysis of feather structure, novel biomimetic herringbone riblets with narrow smooth edge are proposed to reduce surface drag. In comparison with traditional microgroove riblets and other drag reduction structures, the drag reduction rate of the proposed biomimetic herringbone riblets is experimentally clarified up to 16%, much higher than others. Moreover, the drag reduction mechanism of herringbone riblets are also confirmed and exploited by CFD.