Starting Characteristics of Prandtl–Meyer Scramjet Intakes with Overboard Spillage
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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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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