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Using PROPID for Inverse Design

Learn how to conduct inverse design using PROPID for Horizontal Axis Wind Turbines. Explore Newton iteration, power curve optimization, and aerodynamic specifications effectively. Debugging tips also included.

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Using PROPID for Inverse Design

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  1. Using PROPID for Inverse Design Michael S. Selig Associate Professor Department of Aeronautical and Astronautical Engineering University of Illinois at Urbana-Champaign Steady-State Aerodynamics Codes for HAWTs Selig, Tangler, and Giguère August 2, 1999  NREL NWTC, Golden, CO

  2. Peak Power Specification for a Stall Regulated Turbine (1-D Iteration) • PROPID Run: wt04a.in • Baseline Power Curve, No Iteration

  3. Iterate on Scale factor (% Growth) • NEWT1ISWP Line

  4. Variables for Iteration (ITP* Parameters)

  5. Running Interactively with Newton Iteration

  6. NEWT1ISWP Line - Variations

  7. The Quickest Approach

  8. Final Converged Power and Baseline • Radius Grew from 24.6 ft  25.5 ft (see ftn021.dat) New rotor

  9. PROPID Run: wt05a.in • Iteration on Blade Pitch Instead • NEWT1ISWP Line

  10. Variables for Iteration (ITP* Parameters)

  11. Final Converged Power Curve and Previous Ones • Pitch Change: 2 deg  4.3 deg • wt04a.in & wt05a.in Example of 1-D Newton Iteration New rotor

  12. 2-D Newton Iteration • PROPID Run: wt06a.in • Rotor Scale  Peak Power (500 kW) • Rotor RPM  Tip Speed (150 mph, 220 ft/sec)

  13. Screen Grab from Run - Stages

  14. Resulting Power Curve • Radius Change: 24.61 ft  39.9 ft • RPM Change: 64 rpm  52.6 rpm 500 kW Peak Power AEP = 694 MWh/yr

  15. Lift and Axial Inflow Specifications (Multidimensional Newton Iteration) • PROPID Run: wt07a.in (analysis only) • Rotor Radius Same as wt06a.in (39.9 ft) • Variable Speed Turbine Design, TSR = 6

  16. DP and Special Input Lines

  17. Cp (2D_SWEEP) & Power Curve (2D_SWEEP)

  18. Blade Aero and Geometry (1D_SWEEP)

  19. Power Curves • AEP 790 MWh/yr (wt07a) vs 694 MWh/yr (wt06a) Variable Speed Case Stall Regulated Baseline

  20. Lift Distribution • Desire Cl-dist for Best L/D-dist

  21. Axial Induction Factor Distribution • Desire a = 1/3 Betz Optimum

  22. PROPID Run: wt08a.in • Desired Cl-dist vs Baseline

  23. Tabulated Cl-dist

  24. Stage 1: Cl @ Segment 8 = 1.00 • Iterate Pitch • NEWT1LDP Cl Segment 8

  25. Stage 2: Cl @ Segments 9-10 Relative to 8 • Iterate Twist @ Segments 9-10 • NEWT2SDDP

  26. Details Cl Increment @ Segment 9 Relative to Segment 8

  27. Relative Cl Values Segment # Values Relative to Segment 8 8 9 10 -.05 -.10

  28. Iteration Schedule for Cl

  29. Stage 3: Cl @ Segments 2-7 Relative to 8 • Iterate Twist @ Segments 2-7

  30. Converged Cl Distribution

  31. Stage 4: Axial Inflow @ Segment 8 = .333 • Iterate Chord @ Segment 8

  32. Iteration for Axial Inflow at Segment 8

  33. Stage 5: Axial Inflow @ Segments 9-10 Relative to 8 • Iterate Chord @ Segments 9-10

  34. Iteration Schedule for Axial Induction Factor

  35. Stage 6: Axial Inflow @ Segments 2-7 Relative to 8 • Iterate Chord @ Segments 2-7

  36. Converged Axial Inflow Distribution

  37. Automatic Convergence: Uncomment these lines

  38. Power Curve Comparison • AEP 803 MWh/yr (wt08a) vs 790 MWh/yr (wt07a)

  39. Debugging an Input File • Screen Dump on Crash • Now What?

  40. Turn on Debugging Feature (ECHO_INPUT Line) Bad NEWT1LDP Line

  41. Errors, Warnings, and Notes at Runtime • Not Again! *&)*^)^(^:)????

  42. Refer to warnerr-doc.txt • Problem Not Solved? • Email Philippe Giguère! He has offered free tech support during all of August 1999.

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