An Evaluation Testbed for Wind Turbine Blade Tip Designs — Winglet Results
Why this work is in the frame
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Bibliographic record
Abstract
A 3.3 m diameter variable speed wind turbine and rotor has been designed, fabricated and tested with exchangeable blade tip capability. This rotor was custom designed utilizing the National Renewable Energy Laboratory's S83X series airfoils for the University of Waterloo Wind Energy research facility with blades that allow the outer 10% of the blade to be exchanged. Turbine power production measurements were completed in the controlled wind facility covering a range of mean wind speeds, 3.6 m/s to 11 m/s, and turbine rotor shaft rotational rates, 100 rpm to 240 rpm. Power produced by the blades was determined as a function of input wind speed. The coefficient of power, C P , was determined as a function of the tip speed ratio λ and peak C P was found to approach 0.42 at the design λ of 6.7. At the design shaft speed of 200 rpm, the maximum power produced was 1.45 kW at 11 m/s. Prior winglet designs are discussed and two winglet designs are evaluated. The effects of two different winglets, the Maniaci and Gertz designs, were evaluated with surface oil flow visualization and quantified by repeating the test that was executed with the standard tip for each winglet. Both winglets were found to have a bell-shaped power augmentation profile, with a broad peak between 6.5 m/s and 9.5 m/s where power was increased by 5% to 7%. These power augmentation figures matched closely with the findings in the literature that suggested increases of 2% to 8% are possible. It is noted, however, that these designs are certainly not optimal and it is possible that an optimized winglet design through further modeling and testing could be attained.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it