Starting Characteristics of Prandtl–Meyer Scramjet Intakes with Overboard Spillage
Bibliographic record
Abstract
The method for obtaining the limiting contraction for supersonic intake-starting via overboard spillage demonstrated earlier by Veillard et al. (“Limiting Contractions for Starting Simple Ramp-Type Scramjet Intakes with Overboard Spillage,” Journal of Propulsion and Power, Vol. 24, No. 5, 2008, pp. 1042–1049) is applied in the present paper to Prandtl–Meyer scramjet intakes. Starting characteristics for Prandtl–Meyer intakes of various particular designs are also obtained. It is shown that the strong shock design principle proposed by Veillard et al. for simple ramp-type intakes holds for Prandtl–Meyer intakes as well, that is, the intake design based on the assumption of a strong shock terminating at the trailing edge of the intake’s ramp would lead to the Kantrowitz (self-starting) line, which is very close to the theoretically established limiting values for this intake family. The theoretical findings on startability of Prandtl–Meyer intakes are confirmed by the numerical intake-starting experiments based on the same flow model as the one used in the theory (inviscid non-heat-conducting ideal gas with constant specific heats).
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".