Near Field of a Vortex Generated by Chevron-Tipped Flat Plates
Bibliographic record
Abstract
Flat plates with chevron tips of variable depths were designed and their effect on the tip vortex was studied at downstream distances of to at a Reynolds number of 67,000. The test plates were mounted at an angle of attack of 5 deg and the tip vortex was measured using a constant temperature anemometer. The chevron plates formed tip vortices with lower peak tangential velocities and larger core radii as compared to the flat plate (with the exception of the , which had a smaller core radius than the flat plate). It was also found that the tip vortices formed over plates with deeper chevrons exhibited turbulent cores, as opposed to the flat plate and shallow chevron plates. Vortex wandering, an inherent meandering of the tip vortex, was found to be present for every test plate. It results in an overprediction of the core radius and underprediction of the peak tangential velocities. To ensure that the lower peak tangential velocities and larger core radii of the tip vortices formed over chevron tip plates were due to the change in geometry and not a consequence of vortex wandering, Devenport’s correction was applied to the shallow chevron plates; and it was found that after correcting for wandering, the tip vortices formed over chevron tips still had lower peak tangential velocities and larger core radii (with the exception of the plate) as compared to the flat plate.
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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) | 0.001 | 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".