Effects of pitching motion profile on energy harvesting performance of a semi-active flapping foil using immersed boundary method

2018 ◽  
Vol 163 ◽  
pp. 94-106 ◽  
Author(s):  
Weizhong Li ◽  
Wen-Quan Wang ◽  
Yan Yan ◽  
Fang-Bao Tian
Keyword(s):  
Energy Harvesting ◽  
Immersed Boundary Method ◽  
Immersed Boundary ◽  
Pitching Motion ◽  
Flapping Foil ◽  
Boundary Method ◽  
Motion Profile

Energy Harvesting From Vortical Flows by a Passive Heaving Foil

2016 ◽  
Author(s):  
Z. Wei ◽  
Z. Charlie Zheng
Keyword(s):  
Energy Harvesting ◽  
Immersed Boundary Method ◽  
Numerical Stability ◽  
Energy Harvester ◽  
Time Integration ◽  
Interaction Model ◽  
Immersed Boundary ◽  
Pressure Oscillations ◽  
Structure Interaction ◽  
Boundary Method

This paper studies energy harvesting of a two-dimensional foil in the wake downstream of a cylinder. The airfoil is passively mobile in the transverse direction. An immersed-boundary method with a fluid-structure interaction model is validated and employed to carry out the numerical simulation. For improving the numerical stability, a modified low-storage 3rd-order Runge-Kutta scheme is implemented for time integration. The performance of this temporal scheme on reducing spurious pressure oscillations of the immersed-boundary method is demonstrated. The simulation shows a foil emerged in a vortical wake achieves better energy harvesting performance than that in a uniform flow. The types of dynamic response for the energy harvester are identified and the properties of vortical wakes are found to be of pivotal importance in obtaining the desired periodic response of the foil.

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