Mast/Snorkel Performance of the DOLPHIN AUV
Bibliographic record
Abstract
The DOLPHIN is a self-propelled semi-submersible vehicle that operates under but near to the sea surface; typically one-third of the mast projects above the sea surface. As such, the hydrodynamic performance of the complete vehicle is affected by the hydrodynamic performance of the mast. The purpose of the mast is two-fold: to act as a streamlined fairing for the snorkel for the air-breathing Diesel engine, and to support the antenna that is used for communications with the vehicle. This paper examines the effect of the mast on the hydrodynamic performance of the vehicle and shows what improvements might potentially be possible through the use of an alternative design of mast. The results presented are from captive-model towing tank experiments with a half-scale model of the DOLPHIN. Two mast configurations were examined: the original mast: and an alternative mast that includes near-leading-edge air ejection from the upper half of the mast, and a 25-percent-chord trailing-edge flap on the lower half of the mast.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| 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 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".