Computational flow optimization of Wind turbine blades
- 1. • P.Sarathkumar Reddy 22208101029 Mr. G. RAJU Asst.Prof.
- 2. 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)
- 3. 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
- 4. BLADES WITH DIFFERENT AIRFOILS NACA-9417 SC-02 0714 MH-102
- 5. DIMENSIONS OF THE BLADE
- 6. TOTAL VIEW OF BLADES NACA-9417 SC-02 0714 MH-102
- 7. BLADE WITH SURFACE MESH MESH REFINEMENT
- 8. PRISM LAYER SETTING IN T-GRID
- 9. BLADE WITH FLUID VOLUME
- 11. MESH DETAILS
- 12. BLADE INSIDE THE TUNNEL
- 15. STATIC PRESSURE CONTRIBUTION OVER THE BLADES
- 16. NACA 9417
- 17. MH-102
- 18. SC-02 0714
- 19. VELOCITY CONTRIBUTION OVER A BLADE
- 20. NACA 9417
- 21. VECTOR PLOT AROUND THE BLADE
- 22. LIFT AND DRAG VALUES FOR THREE BLADES WITH DIFFERENT ANGLE OF ATTACK-α
- 23. COMPARISION GRAPHS Coefficient of Drag CD Vs alpha-α
- 24. Coefficient of lift Vs alpha-α
- 25. L/D RATIO Vs ALPHA -α
- 26. 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
- 27. CAD MODEL OF NACA-9417 BLADE WITH WINGLET
- 28. Winglet Details Cant angle -70degree Height-17mm
- 29. MESHED MODEL OF NACA-9417 BLADE WITH WINGLET
- 30. MESHED WINGLET
- 31. PRISM LAYER SETTING IN T-GRID
- 32. BLADE WITH WINGLET IN THE FLUID VOLUME
- 34. MESH DETAILS
- 35. WINGLET ASSEMBLY WITH TUNNEL
- 40. COMPARISION OF LIFT WITH WINGLET
- 41. COMPARISION OF DRAG WITH WINGLET
- 45. MESHED GENERATOR
- 46. THREE VIEW OF TOTALASSEMBLY Front view Top view Side view
- 47. TOTALASSEMBLY WITH REAR PLATE
- 49. MRF-CAPSULE
- 51. MRF-capsule inside a volume tunnel
- 54. CONVERGED SOLUT
- 55. Static pressure contour across total assembly
- 56. Static pressure across the blades
- 57. Static pressure across the generator
- 58. Velocity contour across the blades
- 59. Velocity vectors in the whole tunnel
- 60. VECTOR PLOT ACROSS HUB
- 61. VECTORS AROUND THE WINGLET
- 67. Turbulence contour across generator
- 68. 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
- 69. 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.