Progress in Regenerative Cooling and Coking Carbon Accumulation of High-Density Heat-Absorbing Hydrocarbon Fuels
Hypersonic scramjet engines encounter extreme thermal loading conditions during sustained operation. Regenerative cooling has emerged as a cost-efficient and thermodynamically viable strategy for extreme thermal protection in hypersonic propulsion systems. This study reviews the complex coupling mec...
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Aero Weaponry
2025-02-01
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| Series: | Hangkong bingqi |
| Subjects: | |
| Online Access: | https://www.aeroweaponry.avic.com/fileup/1673-5048/PDF/1744270847109-46372441.pdf |
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| Summary: | Hypersonic scramjet engines encounter extreme thermal loading conditions during sustained operation. Regenerative cooling has emerged as a cost-efficient and thermodynamically viable strategy for extreme thermal protection in hypersonic propulsion systems. This study reviews the complex coupling mechanisms in regenerative cooling channels, where endothermic hydrocarbon fuels undergo phase transition, supercritical pyrolysis, and coke deposition. First, the state-of-the-art progress in the field of regenerative cooling is analyzed domestically and internationally. Then, it introduces methods for determining the heat sink of endothermic hydrocarbon fuels. Thirdly, it examines the influence of pyrolysis reaction pathways on the chemical heat sink. Subsequently, quantitative measurement techniques for coke deposition in regenerative cooling channels are displayed. Based on recent experimental and simulation results, it explores the reaction pathways of coke formation and identifies the key factors affecting the amount and morphology of coke in the regenerative channel. Based on this, strategies in improving the heat sink of fuel and reducing coke formation are introduced. Finally, the heat transfer characteristics from single-channel laboratory experiments to multi-channel parallel configurations in practical applications are analyzed. This review provides comprehensive understanding of regenerative cooling technology in scramjet engines. |
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| ISSN: | 1673-5048 |