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Computational flow optimization of Wind turbine blades

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Computational flow optimization of Wind turbine blades

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