Azimuthing podded propellers in ice: experiment and some results
Bibliographic record
Abstract
With the advent of podded propulsors finding applications in vessels destined to operate in ice conditions, a need to better understand how these propulsion devices interact with the ice has been recognized. Subsequently, testing has been conducted at IOT on a characteristic model of Azimuthing Podded Propulsors in order that a method of predicting the loads these devices experience, in ice conditions, may be developed. The following report briefly outlines the model Azimuthing Podded Propulsor, the method and extent of testing and some preliminary results for the Global system from testing the unit in pre-sawn level ice, pack ice and open water. The tests were conducted in Tractor and Pusher modes for ice thickness of 60 and 80 mm, depths of cut of 15 and 30 mm, and for a full range of azimuth angles. Preliminary results indicate the mode of propulsion is fundamental in determining the magnitude of Global loads, with Tractor mode providing reduced Global loads. This mode also produces increased thrust and torque developed when compared to the Pusher mode. These results are based on mean loads and further analysis based on maximum loads, and the loads experienced by the propeller shaft and blades will result in a complete analysis on which to base a computational model.
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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".