Theoretical analysis on detonation initiation induced by thermal nonuniformity in a supersonic flow
文献类型：期刊论文
| 作者 | Yu DH(于德海); Yang PF(杨鹏飞) ; Yue LJ(岳连捷); Chen, Zheng
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| 刊名 | PHYSICAL REVIEW FLUIDS
 |
| 出版日期 | 2024-10 |
| 卷号 | 9期号:10页码:103201 |
| ISSN号 | 2469-990X |
| DOI | 10.1103/PhysRevFluids.9.103201 |
| 英文摘要 | Detonation initiation in a supersonic reactive flow constitutes a crucial problem in fundamental combustion research and meanwhile receives great attention in the application of detonation-based propulsion systems. In this paper, we conduct theoretical analysis on detonation initiation induced by thermal nonuniformity. The underlying mechanism for detonation initiation is attributed to the self-strengthening coupling between the reaction front and the induced shock wave. A detonation initiation factor is introduced to quantify the capability of the thermal nonuniformity in causing detonation initiation. The initiation factor changes nonmonotonically, with the temperature difference describing the thermal nonuniformity. We find that there exist three regimes of detonation initiation. A threshold temperature difference of the thermal nonuniformity below which detonation initiation cannot take place is identified. Additionally, it is found that the temperature profile of the thermal nonuniformity has a substantial impact on detonation initiation. The creation of an additional induced shock wave on the reaction front due to the downward convex temperature profile significantly improves the initiation condition for weak thermal nonuniformities with relatively small temperature difference. Moreover, two-dimensional analysis is also conducted, considering the convective transport in the transverse direction. It is shown that the transverse heat transfer reduces the curvature of the reaction front, which promotes (inhibits) detonation initiation for strong (weak) thermal nonuniformity with large (small) temperature difference. In the present analysis, we provide useful insights into detonation initiation in a supersonic reactive flow. |
| 分类号 | 二类 |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001346320100002 |
| 资助机构 | National Natural Science Foundation of China {52006001, 52425604, 12202014] ; China Postdoctoral Science Foundation {2021M700222] |
| 其他责任者 | Chen Z |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97243]  |
| 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.【Yu, Dehai & Yang, Pengfei & Chen, Zheng】 Peking Univ, Coll Engn, HEDPS, SKLTCS, Beijing 100871, Peoples R China 2.【Yu, Dehai & Yang, Pengfei & Yue, Lianjie】 Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.【Yu, Dehai & Yang, Pengfei & Yue, Lianjie】 Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu DH,Yang PF,Yue LJ,et al. Theoretical analysis on detonation initiation induced by thermal nonuniformity in a supersonic flow[J]. PHYSICAL REVIEW FLUIDS,2024,9(10):103201. |
| APA | 于德海,杨鹏飞,岳连捷,&Chen, Zheng.(2024).Theoretical analysis on detonation initiation induced by thermal nonuniformity in a supersonic flow.PHYSICAL REVIEW FLUIDS,9(10),103201. |
| MLA | 于德海,et al."Theoretical analysis on detonation initiation induced by thermal nonuniformity in a supersonic flow".PHYSICAL REVIEW FLUIDS 9.10(2024):103201. |
入库方式： OAI收割
来源：力学研究所
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