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-Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion
Experimental Investigatio...
-Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion
Table of contents
1 Intro...
-Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion
Emre Barlas, EA Exp. Stud...

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[Experimental Investigation of Wind Turbine/Farm Wakes in a Boundary Layer Wind Tunnel_Emre Barlas

  1. 1. -Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion Experimental Investigation of Wind Turbine/Farm Wakes in a Boundary Layer Wind Tunnel Emre Barlas EA Department Supervisor: Jeroen v. Beeck Advisor: Sophia Buckingham June 25, 2014 Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 1/53
  2. 2. -Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion Table of contents 1 Introduction 2 Objective & Methodology 3 Experimental Results 4 Analytical Models & Simple CFD Approach 5 Conclusion & Future Work Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 2/53
  3. 3. -Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 3/53
  4. 4. -Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 4/53
  5. 5. -Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion Aim of the project Contribute to the understanding of Interaction between ABL-Wind farm wakes Meandering phenomenon,crucial for loading on wind turbines and lifetime Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 9/53
  6. 6. -Introduction -Objective & Methodology -Experimental Results -Analytical Models & CFD -Conlusion Methodology Scaled (≈1:600), controllable wind turbine models with specically designed blades Tests are carried out in a boundary layer wind tunnel, where the turbine models are fully immersed in the 'A.B.L.' (VKI - L1B) Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 10/53
  7. 7. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Experimental Techniques 2D-2C PIV Spatially Resolved 3C-HWA Time Resolved 2D-3C PIV Spatially Resolved Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 11/53
  8. 8. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Pause Recap We are through; Why is this topic important? What am I seeking? How am I seeking? Next: What I found out;Experimental Results Single Wind Turbine Wake - Brief Physics Atmospheric Eects on Single Wind Turbine Wake 1 Wake Dynamics 2 Spectral Content 3 Meandering Two turbines in tandem arrangement 1 Eect of Yaw on the Flow and Power Output Wind Farm Studies 1 Flow within a wind farm 2 Power output and Meandering within a wind farm Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 12/53
  9. 9. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Single Wind Turbine Wake - Brief Physics Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 13/53
  10. 10. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Single Wind Turbine Wake - Brief Physics Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 14/53
  11. 11. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Single Wind Turbine Wake - Brief Physics Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 15/53
  12. 12. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Wind Tunnel Setup Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 16/53
  13. 13. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Wake Dynamics Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 17/53
  14. 14. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Wake Dynamics: Turbulence Charact. Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 18/53
  15. 15. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Wake Dynamics: Reynolds Stresses Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 19/53
  16. 16. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Spectral Content for Single Turbine Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 20/53
  17. 17. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Spectral Content for Single Turbine Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 21/53
  18. 18. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Spectral Content for Single Turbine Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 22/53
  19. 19. A.B.L. Eects - Spectral Content for Single Turbine
  20. 20. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Spectral Content for Single Turbine Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 24/53
  21. 21. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion A.B.L. Eects - Spectral Content for Single Turbine Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 25/53
  22. 22. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Single Turbine Wake Meandering Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 26/53
  23. 23. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Single Turbine Wake Meandering Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 27/53
  24. 24. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Pause Recap We are through; Single Wind Turbine Wake - Physics Atmospheric Eects on Single Wind Turbine Wake 1 Wake Dynamics 2 Spectral Content 3 Meandering Conclusions: Higher Turbulence → Earlier Wake Recovery BUT Higher Fatigue. Spectral Content → Turbine as 'Active Filter'. Meandering → periodic behaviour → for Single Turbine Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 28/53
  25. 25. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Pause Recap We are through; Single Wind Turbine Wake - Physics Atmospheric Eects on Single Wind Turbine Wake 1 Wake Dynamics 2 Spectral Content 3 Meandering Next: Two turbines in tandem arrangement 1 Eect of Yaw on the Flow and Power Output Wind Farm Studies 1 Flow within a wind farm 2 Power output and Meandering within a wind farm Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 29/53
  26. 26. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Active Wake Control: Eect of Yawing Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 30/53
  27. 27. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Active Wake Control: Eect of Yawing on Flow Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 31/53
  28. 28. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Active Wake Control: Eect of Yawing on Power Output Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 32/53
  29. 29. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Wind Farm Studies - Setup Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 33/53
  30. 30. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Wind Farm Studies - Flow within a Wind Farm Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 34/53
  31. 31. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Wind Farm Studies - Power within a Wind Farm Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 35/53
  32. 32. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Wind Farm Studies - Meandering within a Wind Farm Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 36/53
  33. 33. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Wind Farm Studies - Meandering within a Wind Farm Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 37/53
  34. 34. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Pause Recap We are through; Why is this topic important? What am I seeking? How am I seeking? What did I nd out: Experimental Results Next: Comparative Studies with Analytical models and simple CFD Approach Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 38/53
  35. 35. Why Analytical Models
  36. 36. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Simple CFD Approach Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 40/53
  37. 37. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Simple CFD Approach Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 41/53
  38. 38. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion CFD output for single turbine (NEXT SLIDE) Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 42/53
  39. 39. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Single Turbine Comparison: CFD Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 43/53
  40. 40. Single Turbine Comparison: Analytical Models CFD
  41. 41. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion CFD output Wind Farm (NEXT SLIDE) Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 45/53
  42. 42. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Wind Farm CFD Output Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 46/53
  43. 43. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Wind Farm Comparison: CFD Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 47/53
  44. 44. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Wind Farm Comparison: CFD Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 48/53
  45. 45. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Conclusions Single,double turbine and wind farm investigations were carried out with scaled experimental models under various inow conditions The atmospheric turbulence is an important factor on the wake recovery. BUT it is not always advantageous Spectral content could be a way to parametrize the wake dynamics. Eect of yawing the upstream turbine steers the wake, BUT in this study it did not yield power output increase of the array. Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 49/53
  46. 46. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Conclusions The very basic analytical models perform still poorly, but with the increasing knowledge the newer versions are much more accurate. CFD is still a way to go, however if it is aimed to understand the physics of the ow, it is important to use eddy resolving turbulence models. (the structures in the atmosphere are important for loading on wind turbines) Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 50/53
  47. 47. -Introduction -Objective Methodology -Experimental Results -Analytical Models CFD -Conlusion Future Work The wake is fully dependent on the Thrust, so strain gauge measurements are required at various TSR Studies on ow within the wind farms under various inow conditions Introducing another boundary layer with intermediate cups Power output studies by varying wind Farm topology and wind direction Emre Barlas, EA Exp. Study of WT Wakes, Public Pres. June 51/53

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