Bibliographic record
Abstract
Rocket Based Combined Cycle [RBCC] engines have the potential to improve the specific impulse of conventional rockets through the use of atmospheric air. Much of the improvement depends on the ability of the rocket and air streams to mix. This paper examines the ability of a novel inlet design called the exchange inlet to promote mixing within an axisymmetric RBCC engine. Rocket exhaust is injected in an annular pattern starting from a circular throat while drawing air towards the centreline. Numerical simulations are performed focusing on the rocket and air interaction within the engine. The entrained air conditions produced by the exchange inlet are shown to be uniform and avoid significant regions of separated flow around the rocket flowpath. Despite a large variation of flow properties across the entrance of the mixing duct due to the difference between the rocket and air streams, five diameters downstream the flow is shown to be well mixed. The variation in temperature at this distance is reduced by 65% while the rocket exhaust is shown to have spread across the entire exit area (as indicated by species massfraction).
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".