Yaw operation of a shrouded horizontal axis hydrokinetic turbine
Bibliographic record
Abstract
A 19.8 cm diameter horizontal axis hydrokinetic turbine and two shrouds are designed, manufactured and tested in a water tunnel. Effect of yaw angle on performance of the shrouded and unshrouded turbine is investigated experimentally. Consistent power coefficients for the shrouded and unshrouded turbine are obtained for the entire range of tip speed ratio. Output power of the unshrouded turbine is observed to decrease in off-axis flows. Reduction is negligible up to 10° yaw angle but increases as yaw angle increases. The turbine with the convergent-divergent shroud model experiences negligible performance loss in yaw operation compared to the unshrouded turbine. Maximum reduction in performance of the turbine with the shroud in yawed flows is 6% at three Reynolds numbers investigated. This is 17% less than the power reduction of the unshrouded turbine.
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How this classification was reachedexpand
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 | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".