Computational Study of the Propulsive Characteristics of a Shcramjet Engine
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Bibliographic record
Abstract
A shock-induced combustion ramjet is considered wherein gaseous hydrogen is injected via cantilevered ramp injectors located in a staggered manner on opposite walls of the internal duct of a mixed-compression inlet. The nonhomogeneous combustible mixture thus formed at the exit of the duct is then ignited through a shock generated by a wedge located on the lower wall of the duct. The products of the ensuing combustion process are then expanded in a specifically designed nozzle. The numerical simulation of the three-dimensional shcramjet flowfield at Mach 11 and an altitude of 34.5 km is performed by the Window Allocatable Resolver for Propulsion code, in which the multispecies Favre-averaged Navier-Stokes equations are closed by the k-w turbulence model and the Wilcox dilatational dissipation correction, to account for compressibility effects at high convective Mach number. The H 2 -air chemical reactions are modeled by a nine species, 20 reaction model based on that of Jachimowski. Magnitudes of the thrust, fuel specific impulse, and frictional forces on the entire shcramjet configuration are numerically determined. The moderate value of fuel specific impulse of 683 s is primarily due to the high equivalence ratio adopted.
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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