Effect of Geometry Modification of a Double Entrance Y-Duct Inlet on Aerodynamic Performance With High Speed Flow
Bibliographic record
Abstract
Abstract Certain aircraft configurations use embedded gas turbine engines that require offset inlets to direct oncoming air to the engine face. Y-duct inlets are commonly used, especially in military aviation, due to their versatility and aerodynamic performance. Work completed at the Royal Military College of Canada has investigated the performance of two Y-duct designs to study the effect of certain geometric parameters on duct performance. A baseline duct was created and its performance was evaluated at an entrance Mach number of Ma = 0.63. The baseline duct was originally designed for Ma = 0.80 entrance flow; however, the flow choked in the Y-duct at Ma = 0.63. A modified Y-duct was then created by reducing offset and bends in the baseline geometry to overcome the problem. Static and total pressure recovery were evaluated at Ma = 0.8 to determine the presence of secondary flows in the modified duct. This work aims to develop the understanding of relationships between geometric parameters and performance of Y-duct inlets.
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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 | 0.001 | 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 | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".