Numerical and Experimental Investigation of Trailing Edge Flap Performance on a Model Wind Turbine

2018 ◽  
Author(s):  
David Marten ◽  
Sirko Bartholomay ◽  
George Pechlivanoglou ◽  
Christian Nayeri ◽  
Christian O. Paschereit ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Wind Turbine ◽  
Trailing Edge ◽  
Trailing Edge Flap

Effect of Trailing-Edge Flap Deflection on a Symmetric Airfoil Over a Wavy Ground

2018 ◽  
Vol 141 (6) ◽  
Author(s):  
V. Tremblay-Dionne ◽  
T. Lee
Keyword(s):  
Experimental Investigation ◽  
Pitching Moment ◽  
Cyclic Variation ◽  
Trailing Edge ◽  
Opposite Trend ◽  
Aerodynamic Properties ◽  
Trailing Edge Flap ◽  
Flap Deflection ◽  
Naca 0015

The effect of trailing-edge flap (TEF) deflection on the aerodynamic properties and flowfield of a symmetric airfoil over a wavy ground was investigated experimentally. This Technical Brief is a continuation of Lee and Tremblay-Dionne (2018, “Experimental Investigation of the Aerodynamics and Flowfield of a NACA 0015 Airfoil Over a Wavy Ground,” ASME J. Fluids Eng., 140(7), p. 071202) in which an unflapped airfoil was employed. Regardless of the flap deflection, the cyclic variation in the sectional lift Cl and pitching moment Cm coefficients over the wavy ground always persists. The Cm also has an opposite trend to Cl. The flap deflection, however, produces an increased maximum and minimum Cl and Cm with a reduced fluctuation compared to their unflapped counterparts. The Cd increase outperforms the Cl increase, leading to a lowered Cl/Cd of the flapped airfoil.

Unsteady aerodynamic modeling and control of the wind turbine with trailing edge flap

2018 ◽  
Vol 10 (6) ◽  
pp. 063304 ◽  
Author(s):  
Wenguang Zhang ◽  
Yifeng Wang ◽  
Ruijie Liu ◽  
Haipeng Liu ◽  
Xu Zhang
Keyword(s):  
Wind Turbine ◽  
Trailing Edge ◽  
Modeling And Control ◽  
Aerodynamic Modeling ◽  
Unsteady Aerodynamic ◽  
Trailing Edge Flap ◽  
And Control

scholarly journals Quadratic feedback–based equivalent sliding mode control of wind turbine blade section based on rigid trailing-edge flap

2019 ◽  
Vol 52 (1-2) ◽  
pp. 81-90 ◽  
Author(s):  
Ting-Rui Liu
Keyword(s):  
Sliding Mode Control ◽  
Wind Turbine ◽  
Control Algorithm ◽  
Sliding Mode ◽  
Trailing Edge ◽  
Feedback Parameter ◽  
Flutter Suppression ◽  
Mode Control ◽  
Blade Section ◽  
Trailing Edge Flap

Modeling of aeroelastic system of wind turbine blade section based on chordwise rigid trailing-edge flap has been investigated. The flutter suppression of blade section exhibiting flap-wise bending and twist deformation is performed by equivalent sliding mode control. Aerodynamic expressions are based on the modified quasi-steady model which is attached to the influences of trailing-edge flap. The continuous equivalent sliding mode control algorithm based on quadratic feedback parameter is applied to realize flutter suppression, with displacements and velocities, control input of angle of trailing-edge flap and sliding mode function demonstrated. To facilitate the process of computer implementation, the discrete equivalent sliding mode control algorithm is discussed in detail, with better control effects and angle control of trailing-edge flap demonstrated. The quadratic feedback–based equivalent sliding mode control algorithm, including continuous equivalent sliding mode control and discrete equivalent sliding mode control, realizes the analysis of control effects based on feedback parameter with empirical adjustment coefficient. This provides schemes of not only theoretical simulation but also real-time implementation for the application of equivalent sliding mode control in different engineering projects.

Active load control for wind turbine blades using trailing edge flap

2013 ◽  
Vol 16 (3) ◽  
pp. 263-278 ◽  
Author(s):  
Jong-Won Lee ◽  
Joong-Kwan Kim ◽  
Jae-Hung Han ◽  
Hyung-Kee Shin
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Load Control ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Active Load ◽  
Trailing Edge Flap
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