Numerical Analysis of an Ejector under Pulsating Inflow Characteristic of RDC Exhaust Conditions
Bibliographic record
Abstract
To generate favorable flow characteristics for turbine integration at the outlet of a Rotating Detonation Combustor (RDC), installing an ejector or bypass flow device between both components is a viable option. As a first step, an existing ejector is investigated numerically using a Large-Eddy Simulation (LES). Initially, a stationary operating point is investigated and results are compared to available experimental data, where good agreement could be obtained. Subsequently, an axially pulsated flow representative of RDC exhaust velocities is generated at the primary nozzle exit. The amplitude of pressure fluctuations is reduced by about 70% throughout the ejector, whereas the pulsation frequency is retained at the ejector outlet. For the presented operating point, a secondary normal shock appears periodically at the end of the constant-area mixing chamber and retracts upstream as a pressure wave. This flowfield characteristic might not be preferable for a dedicated RDC - ejector configuration due to the introduced net total pressure loss. The shock formation is likely due to the constant-area mixing chamber acting as an aerodynamic convergent under boundary layer presence. This result indicates that an unsteady approach is required to characterise RDC - ejector interaction.
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How this classification was reachedexpand
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 | 0.001 |
| 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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".