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Using PROPID for Inverse Design

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.

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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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