Study of full and truncated aerospike nozzles on performances at different working conditions
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Aerospike nozzles have been a spinoff the plug nozzle alternative for propulsion systems that require adaptation for outside pressure variations. Their capacity to adapt their aerodynamics without the need of moving parts makes them very interesting for space launching vehicles. Conventional Laval nozzles have to trade-off performance as they cross the atmosphere from sea level to their maximum altitude. In this study, the flow simulation is carried out for full and truncated nozzle. Three cases for the truncated length are chosen: 40%, 50% and 60% plug in different working conditions. In over-expansion conditions, with the increase of plug truncation a loss of thrust is observed, compared with the under-expansion conditions, were the nozzle truncation has a negligible effect. CFD analysis shows which plug truncation is giving the optimum performances and how great is the influence of altitude and temperature on this type of propulsion system.
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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 it