Numerical Investigation of Freestream Composition Perturbations in a Scramjet Combustor
文献类型：期刊论文
| 作者 | Li XK(李新康)2,3; Yao W(姚卫)1,3; Yue LJ(岳连捷)1,3; Liu QL(刘起立)1,3 |
| 刊名 | AIAA JOURNAL
 |
| 出版日期 | 2025-09-09 |
| 页码 | 13 |
| 关键词 | Hypersonic Shock Tunnel Scramjet Combustion Chambers Boundary Layer Separation Fuel Injection Combustor Design Fluid Mechanics Thrust Vectoring Numerical Simulation Vehicle Trajectories Partially Premixed Combustion |
| ISSN号 | 0001-1452 |
| DOI | 10.2514/1.J065594 |
| 通讯作者 | Liu, Qili(qililiu@imech.ac.cn) |
| 英文摘要 | This study employs three-dimensional unsteady numerical simulations to analyze fluid-combustion interactions in a scramjet combustor under freestream oxygen perturbations at Mach 6 flight conditions. The combustor utilizes ethylene fuel injection, with systematic examinations of dynamic responses to abrupt reductions in freestream oxygen mole fractions from baseline 0.21 to 0, 0.05, and 0.10. A characteristic mode shift occurs from jet-wake stabilization to cavity shear-layer stabilization during oxygen depletion, followed by reversion to the original mode upon freestream recovery. This transition correlates strongly with perturbations in combustion intensity and heat release redistribution. Rapid alterations in shock train positioning and flow separation characteristics were observed, directly influencing static pressure distributions along the flowpath. The resultant pressure fluctuations exhibited temporal coherence with thrust variations. Thrust modulation magnitudes demonstrated linear dependence on oxygen depletion severity, while combustion sustainability remained intact during 0.2 ms perturbations. Prolonged perturbations can induce cumulative effects and are capable of altering hypersonic vehicle trajectories through thrust vectoring changes. These results highlight the critical time-dependent coupling between freestream composition transients and scramjet operability, providing quantitative benchmarks for robust combustor design in atmospheric disturbance scenarios. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | OXYGEN ENRICHMENT ; JET |
| 资助项目 | National Outstanding Youth Science Fund Project of National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/100014717[12372235] ; National Natural Science Foundation of China General Program[22FAA00908] ; National Outstanding Youth Science Fund Project of the National Natural Science Foundation of China |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001569522300001 |
| 资助机构 | National Outstanding Youth Science Fund Project of National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/100014717 ; National Natural Science Foundation of China General Program ; National Outstanding Youth Science Fund Project of the National Natural Science Foundation of China |
| 其他责任者 | 刘起立 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/103886]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China 2.Univ Sci & Technol China, Sch Engn Sci, Dept Modern Mech, Hefei 230026, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Li XK,Yao W,Yue LJ,et al. Numerical Investigation of Freestream Composition Perturbations in a Scramjet Combustor[J]. AIAA JOURNAL,2025:13. |
| APA | 李新康,姚卫,岳连捷,&刘起立.(2025).Numerical Investigation of Freestream Composition Perturbations in a Scramjet Combustor.AIAA JOURNAL,13. |
| MLA | 李新康,et al."Numerical Investigation of Freestream Composition Perturbations in a Scramjet Combustor".AIAA JOURNAL (2025):13. |
入库方式： OAI收割
来源：力学研究所
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