Influence of Synthetic Jet on Aerodynamic Characteristics of Blunt Trailing Edge Wind Turbine Airfoil

The adoption of blunt trailing edge airfoils for the inner regions of large wind turbine blades has been proposed. Blunt trailing edge airfoils would not only provide increased structural volume, but have also been found to improve the lift characteristics of airfoils and therefore allow for section shapes with a greater maximum thickness. Limited experimental data makes it difficult for wind turbine designers to consider and conduct tradeoff studies using these section shapes. This lack of experimental data precipitated the present analysis of blunt trailing edge airfoils using computational fluid dynamics. Several computational techniques are applied including a viscous/inviscid interaction method and several Reynolds-averaged Navier-Stokes methods.

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Effect of trailing edge dual synthesis jets actuator on aerodynamic characteristics of a straight-bladed vertical axis wind turbine

Energy ◽

10.1016/j.energy.2021.121792 ◽

2022 ◽

Vol 238 ◽

pp. 121792

Author(s):

Peilin Wang ◽

Qingsong Liu ◽

Chun Li ◽

Weipao Miao ◽

Shuai Luo ◽

...

Keyword(s):

Wind Turbine ◽

Vertical Axis ◽

Aerodynamic Characteristics ◽

Vertical Axis Wind Turbine ◽

Trailing Edge

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The influence of oscillating trailing-edge flap on the dynamic stall control of a pitching wind turbine airfoil

Journal of the Brazilian Society of Mechanical Sciences and Engineering ◽

10.1007/s40430-019-1693-z ◽

2019 ◽

Vol 41 (4) ◽

Cited By ~ 3

Author(s):

Mahbod Seyednia ◽

Mehran Masdari ◽

Shidvash Vakilipour

Keyword(s):

Wind Turbine ◽

Dynamic Stall ◽

Trailing Edge ◽

Wind Turbine Airfoil ◽

Trailing Edge Flap ◽

Stall Control

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New combinational active control strategy for improving aerodynamic characteristics of airfoil and rotor

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/0954410019893193 ◽

2019 ◽

Vol 234 (4) ◽

pp. 977-996

Author(s):

Yi-yang Ma ◽

Qi-jun Zhao ◽

Guo-qing Zhao

Keyword(s):

Flow Control ◽

Control Strategy ◽

Active Flow Control ◽

Leading Edge ◽

Aerodynamic Characteristics ◽

Synthetic Jet ◽

Dynamic Stall ◽

Trailing Edge ◽

Trailing Edge Flap ◽

Cfd Method

In order to improve the aerodynamic characteristics of rotor, a new active flow control strategy by combining a synthetic jet actuator and a variable droop leading-edge or a trailing-edge flap has been proposed. Their control effects are numerically investigated by computational fluid dynamics (CFD) method. The validated results indicate that variable droop leading-edge and synthetic jet can suppress the formation of dynamic stall vortex and delay flow separation over rotor airfoil. Compared with the baseline state, Cdmax and Cmmax are significantly reduced. Furthermore, parametric analyses on dynamic stall control of airfoil by the combinational method are conducted, and it indicates that the aerodynamic characteristics of the oscillating rotor airfoil can be significantly improved when the non-dimensional frequency ( k*) of variable droop leading-edge is about 1.0. At last, simulations are conducted for the flow control of rotor by the combinational method. The numerical results indicate that large droop angle of variable droop leading-edge can better reduce the torque coefficient of rotor and the trailing-edge flap has the capability of increasing the thrust of rotor. Also, the synthetic jet could further improve the aerodynamic characteristics of rotor.

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