scholarly journals Trailing edge subcomponent testing for wind turbine blades–Part A: Comparison of concepts

Wind Energy ◽  
2019 ◽  
Vol 22 (4) ◽  
pp. 487-498 ◽  
Author(s):  
M. Rosemeier ◽  
A. Antoniou ◽  
X. Chen ◽  
F. Lahuerta ◽  
P. Berring ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Trailing Edge

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.

Trailing edge noise reduction of wind turbine blades by active flow control

Wind Energy ◽  
2014 ◽  
Vol 18 (5) ◽  
pp. 909-923 ◽  
Author(s):  
Alexander Wolf ◽  
Thorsten Lutz ◽  
Werner Würz ◽  
Ewald Krämer ◽  
Oksana Stalnov ◽  
...  
Keyword(s):  
Flow Control ◽  
Wind Turbine ◽  
Noise Reduction ◽  
Active Flow Control ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Trailing Edge Noise ◽  
Active Flow

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 Trailing Edge Thickness Effect on Tonal Noise Emission Characteristics from Wind Turbine Blades

2021 ◽  
Vol 13 (4) ◽  
pp. 99-111
Author(s):  
Satya Prasad MADDULA ◽  
Vasishta Bhargava NUKALA ◽  
Venkata Swamy Naidu NEIGAPULA
Keyword(s):  
Wind Turbine ◽  
Power Level ◽  
Turbine Blades ◽  
Broadband Noise ◽  
Thickness Effect ◽  
Sound Power ◽  
Noise Generation ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Sound Power Level

Broadband noise generation from wind turbine blades is one of the fundamental aspects of flow-induced noise. Besides the turbulent boundary layer flow over the blades, factors such as the angle of attack, the turbulence intensity, the trailing edge thickness of the blade and their shapes strongly influence the overall sound power levels at high frequencies, i.e. f > 8 kHz. In large operating wind farms, a trade-off between noise generation and power production is considered by power utility firms to maximize the return on investment (ROI) and minimize the fatigue damage on wind turbine components. The present work deals with the analysis of the thickness effect on trailing edge bluntness noise level at hub height average wind speeds of 7 m/s, 10 m/s. A semi-empirical BPM model was used to predict the sound pressure levels from the 37 m blade length of a 2MW wind turbine. The receiver configuration was fixed at a distance of 120 m from the source height of 80 m. The results demonstrated that as the trailing edge height increased from 0.1 % to 0.5 % of the local chord, the sound power level increased by ~ 17 dB for frequencies > 200 Hz, but decreased by 16 dB when the thickness is 0.1 % local chord. The computed results of the sound power level using the BPM model have been validated using experimental data and showed a good agreement for the tonal frequencies, f ~ 10 kHz, where the trailing edge bluntness noise becomes dominant.

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

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

Aerodynamic Analysis of Blunt Trailing Edge Airfoils

2003 ◽  
Vol 125 (4) ◽  
pp. 479-487 ◽  
Author(s):  
K. J. Standish ◽  
C. P. van Dam
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Navier Stokes ◽  
Computational Techniques ◽  
Interaction Method ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Blunt Trailing Edge ◽  
Large Wind ◽  
Structural Volume

The adoption of blunt trailing edge airfoils for the inboard region of large wind turbine blades has been proposed. Blunt trailing edge airfoils would not only provide a number of structural benefits, such as increased structural volume and ease of fabrication and handling, but they have also been found to improve the lift characteristics of airfoils. Therefore, the incorporation of blunt trailing edge airfoils would allow blade designers to more freely address the structural demands without having to sacrifice aerodynamic performance. Limited experimental data make it difficult for wind turbine designers to consider and conduct tradeoff studies using these section shapes and has provided the impetus for the present analysis of blunt trailing edge airfoils using computational fluid dynamics. Several computational techniques are applied, including a viscous/inviscid interaction method and three Reynolds-averaged Navier-Stokes methods.

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
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