A Nozzle Concept to Entrain Atmospheric Air for Ejector Operation
Bibliographic record
Abstract
The purpose of this paper is to describe a design methodology for a converging-diverging nozzle concept that takes advantage of the ejector effect. Incorporating the ejector effect into the nozzle design may be able to provide a more economical means for space transport as thrust increases so fuel quantity can be reduced. Methodology for the proposed nozzle requires three cross sections to be constrained in the diverging portion of the nozzle. The throat maintains axisymmetry with a choked flow condition. A gate is placed between the throat and outlet on the outer perimeter of the nozzle through which the nozzle geometry must pass; however, the shape is given freedom so that it does not have to remain axisymmetric. In doing so, a cutout can be created for air entrainment as the exhaust flow is restricted to flowing through the gate. Finally, the outlet is set to obtain desired rocket exhaust conditions. Viscous effects are accounted for by implementing Edenfield’s experimental displacement thickness correlation for turbulent boundary layers.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".