Oscillating foils for ship propulsion

被引:0
|
作者
Mattheijssens, J.
Marcel, J. -P.
Bosschaerts, W.
Lefeber, D.
机构
[1] Royal Mil Acad, Dept MECA, B-1050 Brussels, Belgium
[2] Vrije Universiteit Brussel, Robot & Multibody Mechan Grp, Brussels, Belgium
来源
DESIGN AND NATURE VI: COMPARING DESIGN IN NATURE WITH SCIENCE AND ENGINEERING | 2012年 / 160卷
关键词
biomimetics; swimming; oscillating foil; ship propulsion; AIRFOIL;
D O I
10.2495/DN120131
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The high propulsive efficiency, the fast manoeuvrability and the low noise production of the propulsion of marine animals inspired the development of a new ship propeller. This text describes the design of a flapping foil ship propeller and the experiments performed on it. The flapping foil propeller mimics the tail fin of fish that swim at high speed, like tunas or sharks, in at least two ways: the hydrodynamics and the resonant driving mechanism. The motion of the foil is a combination of a heaving and a pitching oscillation, with a phase difference. The wake behind the tail of a fish has a special structure called the reversed von Karman street. If the motion parameters are well chosen, the wake behind the flapping foil has a similar structure, resulting in positive thrust force and high propulsive efficiency. The driving mechanism uses flexibility to exclude the need for one of the two actuators. The influence of the free surface and the oscillation frequency on the performance are investigated.
引用
收藏
页码:139 / 147
页数:9
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