Wind Tunnel Measurements of Convective Heat Transfer With Droplet Impact on a Wind Turbine NACA63-421 Blade

2007 ◽  
Author(s):  
Xin Wang ◽  
Greg Naterer ◽  
Eric Bibeau
Keyword(s):  
Heat Transfer ◽  
Wind Turbine ◽  
Turbine Blades ◽  
Experimental Studies ◽  
Cold Weather ◽  
Wind Turbine Blades ◽  
Airfoil Surface ◽  
Turbine Efficiency ◽  
Innovative Methods ◽  
Important Characterization

Icing of wind turbine blades and sensors in cold climates can cause a significant decrease in turbine efficiency and power production, due to the altered blade aerodynamics and forced shutdowns. Various studies have developed innovative methods for de-icing of wind turbine blades and sensors. In this paper, experimental studies of heat transfer with water droplets on a NACA 63–421 airfoil are studied to simulate anti-icing conditions. Various liquid water contents (LWC) are investigated. The measurements can provide important characterization of heat convection between the airfoil surface and cold surrounding air just before icing accumulation. These experimental measurements can be used to develop better methods to reduce impact of wind turbine icing in cold weather climates. This study is intended to provide useful data to improve methods of anti-icing of wind turbines.

scholarly journals TOWARDS EMBEDDED RADCOM-SENSORS IN WIND TURBINE BLADES: PRELIMINARY NUMERICAL AND EXPERIMENTAL STUDIES

2020 ◽  
Vol 90 ◽  
pp. 61-67 ◽  
Author(s):  
Jonas Simon ◽  
Jochen Moll ◽  
Viktor Krozer ◽  
Thomas Kurin ◽  
Fabian Lurz ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Experimental Studies ◽  
Wind Turbine Blades

scholarly journals A Feasibility Study to Reduce Infrasound Emissions from Existing Wind Turbine Blades Using a Biomimetic Technique

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4923
Author(s):  
Jinlei Lv ◽  
Wenxian Yang ◽  
Haiyang Zhang ◽  
Daxiong Liao ◽  
Zebin Ren ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Human Health ◽  
High Frequency ◽  
Numerical Study ◽  
Experimental Testing ◽  
Turbine Blades ◽  
Experimental Studies ◽  
Frequency Noise ◽  
Wind Turbine Blades ◽  
High Frequency Noise

Infrasound, i.e., low-frequency noise in the frequency range of 10–200 Hz, produced by rotating wind turbine blades has become a matter of concern because it is harmful to human health. Today, with the rapid increase of wind turbine size, this kind of noise is more worrying than ever. Although much effort has been made to design quiet wind turbine blades, today there is still a lack of effective techniques to reduce infrasound emissions from existing blades. To fill this gap in technology, a biomimetic technique that can be readily applied to reduce infrasound emissions of existing wind turbine blades is studied in this paper using both numerical simulation and experimental testing approaches. The numerical study of the technique is based on the analysis of the sound field distribution near the blade, which is derived by performing both aerodynamic and acoustic simulations of the blade. The experimental study of the technique is based on laboratory tests of two scale models of the blade. Both numerical and experimental studies have shown that the shedding vortices behind the blade can be successfully suppressed by semi-cylindrical rings wrapped on the blade. Consequently, both infrasound and the overall sound pressure level of the noise produced by the blade are significantly reduced. Although the rings fail to show good performance in reducing high-frequency noise, it is not a problem for human health because high-frequency noise is weak and moreover it attenuates rapidly as distance increases. The research also showed that the proposed technique can, not only reduce the infrasound produced by the blade, but can also improve the power coefficient of wind turbines.

Aerodynamic Performance of Wind Turbine Blades in Dusty Environments

2007 ◽  
Author(s):  
Yasmin Khakpour ◽  
Suheila Bardakji ◽  
Sudhakar Nair
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Flow Rate Ratio ◽  
Surface Drag ◽  
Wind Turbine Blades ◽  
Dimensionless Numbers ◽  
Airfoil Surface ◽  
Discrete Phase ◽  
Sand Particles ◽  
Drag And Lift

The performance of wind turbine blades can be affected by conditions such as sand concentration in dry dusty environments. The mathematical formulations for continuum phase (air) and discrete phase (sand particles) along with the imposed assumptions and applied boundary conditions are presented in this paper. The numerical simulation conducted in this paper studied the effect of sand particles on flow structure and essential dimensionless numbers for flow over the primary airfoil of the wind turbine. The effects of controlling parameters such as sand dimensions, sand/air drift velocity and sand/air mass flow rate ratio are studied and the results are compared against the conditions of uniform, far-field air flow. The results are presented in terms of pressure distribution over the airfoil surface, drag and lift coefficients along with variation of erosion and accretion due to the collision of sand particles over the airfoil surface for various attack angles.

Experiments of Wind Turbine Blades with Rocket Triggered Lightning

2009 ◽  
Vol 129 (5) ◽  
pp. 689-695
Author(s):  
Masayuki Minowa ◽  
Shinichi Sumi ◽  
Masayasu Minami ◽  
Kenji Horii
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Triggered Lightning

Folding of flexible hinges for aircraft wingtips and wind turbine blades

2021 ◽  
Author(s):  
Aileen G. Bowen Perez ◽  
Giovanni Zucco ◽  
Paul Weaver
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades

Evaluation of the influence of wind speed and angle of attack on the aerodynamic effect of wind turbine blades

2017 ◽  
Author(s):  
Salete Alves ◽  
Luiz Guilherme Vieira Meira de Souza ◽  
Edália Azevedo de Faria ◽  
Maria Thereza dos Santos Silva ◽  
Ranaildo Silva
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Turbine Blades ◽  
Angle Of Attack ◽  
Wind Turbine Blades ◽  
Aerodynamic Effect
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