Dynamic interference of two anti-phase flapping foils in side-by-side arrangement in an incompressible flow

被引：43
作者：
Bao, Y. [1 ,2 ]
Zhou, D. [1 ,2 ,3 ]
Tao, J. J. [4 ,5 ]
Peng, Z. [6 ]
Zhu, H. B. [1 ]
Sun, Z. L. [4 ,5 ]
Tong, H. L. [7 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Dept Civil Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China
[3] Collaborat Innovat Ctr Adv Ship & Deep Sea Explor, Shanghai 200240, Peoples R China
[4] Peking Univ, Dept Mech & Aerosp Engn, Coll Engn, CAPT, Beijing 100871, Peoples R China
[5] Peking Univ, Dept Mech & Aerosp Engn, Coll Engn, SKLTCS, Beijing 100871, Peoples R China
[6] Univ Notre Dame, Dept Aerosp & Mech Engn, Notre Dame, IN 46556 USA
[7] Inner Mongolia Vocat Coll Chem Engn, Hohhot 010070, Peoples R China
来源：
PHYSICS OF FLUIDS | 2017年 / 29卷 / 03期
基金：
中国国家自然科学基金;
关键词：
LOW REYNOLDS-NUMBERS; PRESSURE-GRADIENT PROJECTION; FINITE-ELEMENT FORMULATION; THRUST GENERATION; CIRCULAR-CYLINDERS; OSCILLATING FOILS; SQUARE CYLINDERS; BIPLANE CONFIGURATION; INDUCED VIBRATIONS; AIRFOILS;
D O I：
10.1063/1.4978301
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A two-dimensional computational hydrodynamic model is developed to investigate the propulsive performance of a flapping foil system in viscous incompressible flows, which consists of two anti-phase flapping foils in side-by-side arrangement. In the simulations, the gap between the two foils is varied from 1.0 to 4.0 times of the diameter of the semi-circular leading edge; the amplitude-based Strouhal number is changed from 0.06 to 0.55. The simulations therefore cover the flow regimes from negligible to strong interference in the wake flow. The generations of drag and thrust are investigated as well. The numerical results reveal that the counter-phase flapping motion significantly changes the hydrodynamic force generation and associated propulsive wake. Furthermore, the wake interference becomes important for the case with a smaller foil-foil gap and induces the inverted Benard von Karman vortex streets. The results show that the hydrodynamic performance of two anti-phase flapping foils can be significantly different from an isolated pitching foil. Findings of this study are expected to provide new insight for developing hydrodynamic propulsive systems by improving the performance based on the foil-foil interaction. Published by AIP Publishing.
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页数：12
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