Aerodynamic analysis of dimple effect on Horizontal Axis Wind Turbine blade

HAWT (Horizontal Axis Wind Turbine) is a wind turbine where the primary rotor shaft and electrical generator areplaced horizontally, perpendicular to the wind direction. Dimples are small surface depressions that reduce drag and improve lift. Variations in dimple characteristics have a substantial i...

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Bibliographic Details
Main Authors: Rashid, Muhammed, Sabu, Steeve, Kunjachan, Alwin, Kuriakose, Soni, Joseph, Joby, Mangalath, Georgekutty S., Anjilivelil, Tomson
Format: Conference Proceeding
Language:English
Subjects:
Aerodynamics
Airfoils
Angle of attack
Boundary layers
Dimpling
Drag coefficients
Drag reduction
Electric generators
Horizontal Axis Wind Turbines
Shape effects
Turbine blades
Turbulence models
Wind direction
Wind effects
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Summary:HAWT (Horizontal Axis Wind Turbine) is a wind turbine where the primary rotor shaft and electrical generator areplaced horizontally, perpendicular to the wind direction. Dimples are small surface depressions that reduce drag and improve lift. Variations in dimple characteristics have a substantial impact on wind turbine aerodynamic efficiency. The present work investigates the effects of dimple size, shape, and placement on the surface of airfoils in HAWT blades. CFD analysis using ANSYS Fluent solver is employed to investigate the aerodynamic performance of NACA 4412 airfoil with dimples using Spalart Allmaras turbulence model. The analysis was done under the inlet velocity of 8 m/s and the optimum angle of attack was found at 4 degrees. The results provide detailed insights into the lift and drag coefficients, boundary layer development, and aerodynamic performance. It shows that dimples effectively increase efficiency if they are concentrated nearer the trailingedge.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0227531