Experimental study on effects of nozzles and combustors on the rotating detonation rocket engine in pulse operation
Bibliographic record
Abstract
• 1 The feasibility of RDRE high-frequency pulse operation was verified. • 2 Effects of nozzles and combustors on RDRE operation were obtained. • 3 RDRE with the optimal RDW propagation characteristics were explored. • 4 The modes of RDW under different conditions were analyzed. The rotating detonation engine (RDE) is an innovative pressure-gain combustion device that harnesses detonation waves for efficient fuel combustion. This paper examines the impact of various nozzle and combustor configurations on the operating characteristics of a rotating detonation rocket engine (RDRE) with a pulse operating frequency of 10 Hz. Through experimental analysis,the study investigates the propagation mode and establishment process of rotating detonation waves (RDWs) and the thrust performance across seven different engine structures to identify the optimal combination. The results show that the detonation-wave velocity and stability of cavity combustor are optimal, and the stability of detonation-wave propagation improves with an increasing equivalence ratio. The establishment time of the detonation wave is <10 % of the single pulse duration. At similar equivalence ratios, the RDRE featuring an annular combustor and a plug nozzle achieves the swiftest establishment at under 1 ms. The detonation-wave propagation velocity in RDREs exhibits significant differences between nozzle configurations: 2.1 km/s for Laval nozzles versus 1.8 km/s for plug nozzles. The RDRE with a Laval nozzle has higher detonation-wave propagation velocity than that of the plug nozzle structure. Furthermore, integrating a laval nozzle and a cavity combustor in a high-pulse-frequency operation significantly enhances the engine's propulsion performance. This research aspires to offer valuable insights for the utilization of RDREs in spacecraft attitude control applications.
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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 | 0.000 |
| 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 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".