Hydrodynamic design of a stern flap appendage for the HALIFAX Class Frigates
Bibliographic record
Abstract
The HALIFAX Class frigates comprise a class of 12 warships that will represent Canada's primary naval defence capability well into the 21st century. Driven by a concern regarding the escalating cost of fuel to operate the HALIFAX Class frigates, the Institute for Ocean Technology has been contracted by the Department of National Defence to carry out research, in collaboration with the Defence R&D Canada - Atlantic, to develop a viable stern flap appendage that will reduce hydrodynamic resistance for a Class-wide blended annual speed profile with secondary benefits such as an increase in forward speed, improved propeller cavitation performance and a reduced stern wave system. Research carried out by other navies has shown that the addition of a suitable stern appendage can reduce warship fuel costs from 5 to 10% depending on the operational profile of the ship. This paper provides a detailed description of the hydrodynamic design process for an optimum stern flap appendage suitable for Canada's HALIFAX Class frigates that includes a literature review, extensive physical and numerical modeling, data analysis procedure and some example results.
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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".