Author response for "Simulation of oscillating trailing edge flaps on wind turbine blades using ranging fidelity tools"

2020 ◽  
Author(s):  
Prospathopoulos, John M. ◽  
Riziotis, Vasilis A. ◽  
Schwarz, Eva ◽  
Barlas, Thanasis ◽  
Aparicio-Sanchez, Maria ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Author Response ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Trailing Edge Flaps

Design and Simulation of Active External Trailing-Edge Flaps for Wind Turbine Blades on Load Reduction

2017 ◽  
Vol 30 (5) ◽  
pp. 04017062 ◽  
Author(s):  
Xiao Sun ◽  
Qingli Dai ◽  
Muraleekrishnan Menon ◽  
Fernando Ponta
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Load Reduction ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Trailing Edge Flaps

scholarly journals Simulation of oscillating trailing edge flaps on wind turbine blades using ranging fidelity tools

Wind Energy ◽  
2020 ◽  
Author(s):  
John M. Prospathopoulos ◽  
Vasilis A. Riziotis ◽  
Eva Schwarz ◽  
Thanasis Barlas ◽  
Maria Aparicio‐Sanchez ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Trailing Edge Flaps

scholarly journals Deep dynamic stall and active aerodynamic modification on a S833 airfoil using pitching trailing edge flap

2020 ◽  
pp. 0309524X2093885
Author(s):  
Farid Samara ◽  
David A Johnson
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Hysteresis Loops ◽  
Bending Moment ◽  
Dynamic Stall ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Load Fluctuation ◽  
Trailing Edge Flaps ◽  
Trailing Edge Flap

Due to the dynamic nature of the wind resource, wind turbine blades are subjected to significant variation in flow parameters, such as the angle of attack ([Formula: see text]). In some cases, the occurrence of dynamic stall on wind turbine blades causes load fluctuation which leads to material fatigue that tends to decrease the life span of the blades. In this study, the influence of a trailing edge flap on dynamic stall effects is investigated at high [Formula: see text] typical of wind turbines but atypical elsewhere. Pitching of the trailing edge flap was found to have a significant impact on the dynamic stall hysteresis loops responsible for the load fluctuation. Frequency analysis showed that the trailing edge flap was capable of reducing the cyclic fluctuation in the coefficient of lift and root bending moment by at least 26% and 24%, respectively. These results are a significant contribution toward understanding the advantages of using trailing edge flaps and how implementing them will reduce wind turbine blade load fluctuations.

Analysis of Blunt Trailing Edge Airfoils

2003 ◽  
Author(s):  
K. J. Standish ◽  
C. P. van Dam
Keyword(s):  
Experimental Data ◽  
Wind Turbine ◽  
Turbine Blades ◽  
Navier Stokes ◽  
Computational Techniques ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Blunt Trailing Edge ◽  
Large Wind ◽  
Structural Volume

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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