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| Effects of different flapping ways on input power of a hydrofoil |
| Received:June 29, 2016 Revised:November 15, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201705008 |
| KeyWord:hydrofoil flapping projected immersed boundary method input power wake evolution |
| Author | Institution |
| 李伟忠 |
昆明理工大学 建筑工程学院 工程力学系, 昆明 |
| 王文全 |
昆明理工大学 建筑工程学院 工程力学系, 昆明 |
| 闫妍 |
昆明理工大学 建筑工程学院 工程力学系, 昆明 |
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| Abstract: |
| A projected immersed boundary method is used to simulate a flapping foil,which is a two-dimensional NACA0012 hydrofoil with Reynolds number Re=800.The influence of the input power in different flapping ways is studied.The maximum pendulum angle θ0 is 75°,the frequency f is from 0.1 Hz to 0.2 Hz and the non-sinusoidal pendulum parameter is from one to three.The results show that,firstly,the averaged input-power coefficient increases with parameters f and β,however,it undergoes a rapid ascent when f>0.16 Hz,β>2.5.Secondly,the maximum input-power coefficient also increases with β at f=0.16 Hz,moreover,the location of maximum input-power coefficient is related to β.Finally,lift force and drag force are connected with trailing edge vortex. Specifically,the negative vortex on the top surface produces resistance,and the negative vortex on the bottom surface induces lift force,which affects the input power of the flapping hydrofoil. |
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