Influence of suction flow control on energy extraction characteristics of flapping foil

Wang, Jiayue; Huang, Shengxian; Hou, Longfeng; Wang, Ying

doi:10.1080/15435075.2021.1973478

Cited by 1 publication

(1 citation statement)

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“…Later, suction technology was further studied in aerodynamic research. The results of these studies show that suction and blowing significantly affect lift and drag coefficients by shifting the pattern of pressure across the airfoil's surface [7,8]. In addition, the methods of air blowing, suction, and synthetic jet have been used to study NACA airfoils [9,10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Suction Flow Control Technology for a Blunt Trailing Edge Hydrofoil

Yang,

Zhang,

Yan

et al. 2023

Mathematics

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The generation of hydro-mechanical resonance is related to the transition of the boundary layer and the development of vortex shedding. The application effect of suction control in hydrodynamics is equally deserving of consideration as an active control technique in aerodynamics. This study examines how suction control affects the flow field of the NACA0009 blunt trailing edge hydrofoil using the γ transition model. Firstly, the accuracy of the numerical method is checked by performing a three-dimensional hydrofoil numerical simulation. Based on this, three-dimensional hydrofoil suction control research is conducted. According to the results, the suction control increases the velocity gradient in the boundary layer and delays the position of transition. The frequency of vortex shedding in the wake region lowers, and the peak value of velocity fluctuation declines. The hydrofoil hydrodynamic performance may be successfully improved with a proper selection of the suction coefficient via research of the suction coefficient and suction position on the flow field around the hydrofoil. The lift/drag ratio goes up as the suction coefficient goes up. The boundary layer displacement thickness and momentum thickness are at their lowest points, and the velocity fluctuation amplitude in the wake region is at its lowest point as the suction coefficient Cμ = 0.003. When the suction slots are at the leading edge, the momentum loss in the boundary layer is minimal and the velocity fluctuation in the wake zone is negligible.

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