Improving Dynamic Stall Effects Using Leading Edge Tubercles
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Bibliographic record
Abstract
View Video Presentation: https://doi.org/10.2514/6.2022-3529.vid This paper investigates the application of leading-edge tubercles, for reducing aerodynamic drag and nose-up pitching moments, as well as mitigating hysteresis during dynamic stall. The effect of different tubercle shapes are evaluated using transient computational fluid dynamics models at different flight conditions. Results suggest a reduction of drag, and moment hysteresis of 29.4% and 34.5%, respectively, averaged over all flight conditions, compared to the baseline straight leading-edge model. This improvement comes with a lift decrease penalty of 8.9%. Additionally, the maximum drag and nose-up pitching moments are reduced through the application of leading-edge tubercles, with minimal change in maximum lift.
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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 | 0.000 | 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 it