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• P.Sarathkumar Reddy 22208101029
Mr. G. RAJU Asst.Prof.
INTRODUCTION OF THE
PROJECT
• This Project aims to undertake aerodynamic analysis of a
Horizontal Axis Wind Turbine
• Computational Fluid Dynamics (CFD) software is used to
compare the performance of different Wind Turbine Blade
Profile
• A steady state, incompressible flow solver for Multiple
Reference Frames (MRF)
OBJECTIVE
FIRST-CUT ANALYSIS
• Flow optimization in different blade sections, with different Angle of
Attack (α)
• Geometry of the standard NACA-9417 Airfoil
• MH-102 from -Illinois University
• SC 02-0714 - Airfoil Investigation Website
SECOND-CUT ANALYSIS
• Flow optimization in a blade with a add-on part which gives better result
• Winglet
FINALANALYSIS
• Flow of air over a rotating wind turbine rotor implies that the fluid flows
in an inertial frame of reference while the rotor rotates in a non inertial
reference frame
BLADES WITH DIFFERENT
AIRFOILS
NACA-9417
SC-02 0714
MH-102
DIMENSIONS OF THE BLADE
TOTAL VIEW OF BLADES
NACA-9417
SC-02 0714
MH-102
BLADE WITH SURFACE MESH
MESH
REFINEMENT
PRISM LAYER SETTING IN T-GRID
BLADE WITH FLUID VOLUME
Computational flow optimization of Wind turbine blades
MESH DETAILS
BLADE INSIDE THE TUNNEL
BOUNDARY CONDITIONS SETTING
CONVERGED SOLUTION
STATIC PRESSURE CONTRIBUTION
OVER THE BLADES
NACA 9417
MH-102
SC-02 0714
VELOCITY CONTRIBUTION
OVER A BLADE
NACA 9417
VECTOR PLOT AROUND THE BLADE
LIFT AND DRAG VALUES FOR
THREE BLADES WITH DIFFERENT
ANGLE OF ATTACK-α
COMPARISION GRAPHS
Coefficient of Drag CD Vs alpha-α
Coefficient of lift Vs alpha-α
L/D RATIO Vs ALPHA -α
Add-on part(winglet)
• After completion of first cut analysis, we
finalized NACA-9417 at 10 degree angle of
attack is giving the better results
• The blade which we got the better result , in
that the add-on part(winglet) will be
implemented and the second cut analysis starts
in that configuration
CAD MODEL OF NACA-9417 BLADE
WITH WINGLET
Winglet Details
Cant angle -70degree
Height-17mm
MESHED MODEL OF NACA-9417 BLADE
WITH WINGLET
MESHED WINGLET
PRISM LAYER SETTING IN T-GRID
BLADE WITH WINGLET IN THE FLUID
VOLUME
Computational flow optimization of Wind turbine blades
MESH DETAILS
WINGLET ASSEMBLY WITH TUNNEL
BOUNDARY CONDITION SETTING
CONVERGED SOLUTION
STATIC-PRESSURE CONTOUR
VELOCITY VECTOR CONTOUR
COMPARISION OF LIFT WITH WINGLET
COMPARISION OF DRAG WITH WINGLET
GENERATOR ASSEMBLY
THREE BLADE ASSEMBLY
Computational flow optimization of Wind turbine blades
MESHED GENERATOR
THREE VIEW OF TOTALASSEMBLY
Front view
Top view
Side view
TOTALASSEMBLY WITH REAR PLATE
Computational flow optimization of Wind turbine blades
MRF-CAPSULE
Computational flow optimization of Wind turbine blades
MRF-capsule inside a volume tunnel
Computational flow optimization of Wind turbine blades
Computational flow optimization of Wind turbine blades
CONVERGED SOLUT
Static pressure contour across total assembly
Static pressure across the blades
Static pressure across the generator
Velocity contour across the blades
Velocity vectors in the whole tunnel
VECTOR PLOT ACROSS HUB
VECTORS AROUND THE WINGLET
Dynamic pressure contour
Computational flow optimization of Wind turbine blades
Computational flow optimization of Wind turbine blades
Computational flow optimization of Wind turbine blades
Computational flow optimization of Wind turbine blades
Turbulence contour across generator
CONCLUTION
• A growing number of researchers is using CFD to
study wind-turbine wake aerodynamics
• More research on the effect of stratification on power
production is to be expected
• Aerodynamics turbulence is a dominating factor,
affecting the blade performance and Wake behaviour
so we tried to reduce this factor in this analysis
REFERENCES
• H. Piggott. (2010, Scoraig Wind. Available: www.scoraigwind.com
• K. Kishinami, et al., "Theoretical and Experimental Study on the
Aerodynamic Characteristic of a Horizontal Axis Wind Turbine," Elsevier,
2005.
• Anderson, J.D. Computational Fluid Dynamics: The Basics with
Applications.McGraw-Hill, New York, NY, USA, 1995.
• Gupta, A. Computational Fluid Dynamic Simulation of Wind Turbines.
Master’s thesis, The Pennsylvania State University, 2006.
• Somers, Dan M., and Tangler, J. Design and Experimental Results for the
S809
• Airfoil. National Renewable Energy Laboratory (NREL) (1997).
• R. E. a. K. Sheldahl, P. C., "Aerodynamic Characteristics of Seven Airfoil
Sections Through 180 Degrees Angle of Attack for Use in Aerodynamic
Analysis of Vertical Axis Wind Turbines, "Sandia National Laborotories,
Albuquerque, New Mexico, USA1981.

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Computational flow optimization of Wind turbine blades