Wind Turbine Blade Analysis

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Abstract: The aerodynamic Airfoils of wind turbine blades have crucial influence on aerodynamic efficiency of wind turbine. This involves the selection of a suitable Airfoil section for the proposed wind turbine blade. Lift and Drag forces along with the angle of attack are the important parameters in a wind turbine system. These parameters decide the efficiency of the wind turbine. In this paper an attempt is made to study the Lift and Drag forces in a wind turbine blade for NACA4412 Airfoil profile is considered for analysis. In the present work, the numerical and experimentally analysis lift and drag performances of NACA 4412 airfoil at different attack angle for Reynolds numbers (Re) 3 ×105 by measuring…show more content…
This is called the angle of attack. At very large angles of attack the blade (stalls) and the lift decreases again. Hence there is an optimum angle of attack to generate the maximum lift
V NUMERICAL ANALYSIS
Two-dimensional (2D) aerodynamic models is explained in this topic. Different modeling strategies are exploited in order to address the accuracy of the modeling presented in this and other topic. TWO-DIMENSIONAL AEROFOIL’S MODELING
Designer Modeler is the pre-processor of ANSYS-FLUENT. A simulation model can be created in Designer Modeler directly or imported from other CAD software packages, such as Solid Works and Pro/Engineer®. In this paper, aerofoil’s NACA 4412 is modeled.
The NACA four digit wing sections define the profile by:
• 1st digit - maximum camber in percent chord
• 2nd digit - location of maximum camber along chord line (from leading edge) in tenths of chord
• 3rd and 4th digits - maximum thickness in percent chord Image 5.1 - Depicts the profile of NACA 4412
…show more content…
LITERATURE REVIEW kevadiya M et al. (2013) has study the NACA 4412 airfoils section of wind turbine blade. Geometry of the airfoil is created using GAMBIT 2.4.6. And CFD analysis is carried out using FLUENT 6.3.26 at various angles of attack from 0° to 120. The coefficient of lift and drag values are calculated for 1 ×105 Reynolds number. And conclude that coefficient of Lift/Drag ratio increases with increase in Angle of attack up to 8°. After 8°, Lift/Drag ratio decreases with increase in Angle of attack.
Patel H and Damania S (2013) has carried out CFD analysis of wind turbine blade for airfoil section NACA 0018 . In this analysis, the geometry is prepared in the pro-e software package and then import this geometry in the ANSYS 12.0.
Form this study they conclude as following:
(1)The maximum value of coefficient of performance (CPmax = 0.277191) was observed at angle of attack 60 and 70 and the velocity of 26 m/s.
(2) This blade can generate maximum power of 3374 w at maximum CP, at angle of attack 60 and velocity of air 26m/s.
(3) It was observed that value of numerical power increases as angle of attack increases from 10 to 70, after 70 the value of numerical power reduced. Hence critical angle of attack for this blade is

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