Effect of ground obstacle of different aspect ratio on wake vortex dissipation
Bibliographic record
Abstract
© 2016, National Research Council Canada. The employment of obstacles to accelerate dissipation of aircraft wake vortex near ground was proposed by DLR, with several subsequent studies on the effect of the obstacles under different atmospheric conditions. In collaboration with DLR, the NTU research team employed large eddy simulation to study the effect of obstacle shape on the dissipation rate and propagation speed of vortex breakup. Simulation results have shown that while the shape of the obstacle influences the propagation speed of vortex breakup, the flow-facing area of the obstacles is the major contributing factor deciding the magnitude of circulation reduction on top of the obstacle. The current study aims to investigate the effect of the aspect ratio of obstacle on vortex dissipation while holding the biggest contributor to reduction of circulation, form drag from the obstacle projected area, constant. Our simulation data has shown that, with every other parameter remained constant, the aspect ratio of obstacle makes negligible difference to the dissipation rate of wake vortex. The result suggested that the height of the obstacle could be further reduced into a less intrusive profile and lessen the impact of these obstacles on airport operations.
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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) | 0.048 | 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".