Dynamic reactions of a free-pitching foil to the reverse Karman vortices

被引：25
作者：
Bao, Y.
Tao, J. [1 ]
机构：
[1] Peking Univ, Dept Mech & Engn Sci, Coll Engn, CAPT, Beijing 100871, Peoples R China
来源：
PHYSICS OF FLUIDS | 2014年 / 26卷 / 03期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
2 FLAPPING FILAMENTS; FLOWING SOAP FILM; THRUST GENERATION; FISH; AIRFOIL; BODIES; FLIGHT;
D O I：
10.1063/1.4870064
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In order to understand the energy saving mechanism of fish schooling, the dynamic reactions of a free-pitching downstream foil to the oncoming reverse Karman vortices shed from a flapping leading foil are investigated numerically. When the position of the hindfoil is optimized in a staggered arrangement, a significant augmentation of the thrust efficiency for the whole two-foil system is obtained because of the suction effect of a vortex pair formed at the leading edge of the hindfoil and the guide-plate effect of the hindfoil on the mean-flow jet originated at the trailing edge of the forefoil. (C) 2014 AIP Publishing LLC.
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页数：7
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