Theoretical analysis on the forced ignition of a quiescent mixture by heat and radical sources
文献类型：期刊论文
| 作者 | Yu DH(于德海)3; Yue LJ(岳连捷)2,3 ; Chen, Zheng1
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| 刊名 | PROCEEDINGS OF THE COMBUSTION INSTITUTE
 |
| 出版日期 | 2024 |
| 卷号 | 40期号:1-4页码:7 |
| 关键词 | Forced ignition Radical deposition Flame kernel Rate profile Minimum ignition energy |
| ISSN号 | 1540-7489 |
| DOI | 10.1016/j.proci.2024.105549 |
| 通讯作者 | Chen, Zheng(cz@pku.edu.cn) |
| 英文摘要 | Forced ignition of premixed flame plays a crucial role in fundamental combustion research. In this work, a theoretical investigation is conducted interpreting the flame kernel development subject to heat and radical ignition sources. Adopting simplified two-step reaction mechanism, the present theoretical model incorporates both chain-branching and recombination reaction paths and reveals their synergistic effect during the forced ignition process. The transient evolution of flame kernel driven by heat and radical addition can be obtained by solving an implicit ordinary differential equation, which is rigorously derived from first principles based on large activation energy asymptotics. The findings reveal that an increase in fuel Lewis number adversely affects the fuel supply rate at the flame front, while a decrease in the radical Lewis number inhibits radical accumulation, both of which exhibit negative impacts on ignition process. For ignition source with uniform rate profile, there exist a critical heating power, below which the flame kernel cannot reach the critical radius despite extended ignition duration. Exceeding this threshold, the minimum ignition energy varies non-monotonically with increasing heating power. Particularly, comparing with the purely thermal ignition source, the heat and radical ignition sources can effectively reduce the thermal load on ignition device, which can be attributed to the synergistic effects of heat and radicals in the ignition process. A comparative analysis on various rate profiles of ignition source, including uniform, trigonometric and Gaussian, indicates that the Gaussian profile has superior efficiency in facilitating flame kernel expansion and transition to self-sustained spherical flame. Specifically, ignition source with Gaussian profile shows the lowest minimum ignition energy, which is primarily due to its capability for concentrated and optimally timed energy deposition, especially for large fuel Lewis numbers. The present analysis provides insightful understandings of forced ignition for premixed flame and offers practical perspectives for real-world applications. |
| 分类号 | 一类 |
| WOS关键词 | PREMIXED FLAMES ; INITIATION ; ENERGY ; EVOLUTION ; LIMIT |
| 资助项目 | National Natural Science Foundation of China[52006001] ; National Natural Science Foundation of China[52176096] ; National Natural Science Foundation of China[U2141220] |
| WOS研究方向 | Thermodynamics ; Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001275111500001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | Chen, Zheng |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/96145]  |
| 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.Peking Univ, Coll Engn, HEDPS, SKLTCS, Beijing 100871, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.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,Yue LJ,Chen, Zheng. Theoretical analysis on the forced ignition of a quiescent mixture by heat and radical sources[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2024,40(1-4):7. |
| APA | 于德海,岳连捷,&Chen, Zheng.(2024).Theoretical analysis on the forced ignition of a quiescent mixture by heat and radical sources.PROCEEDINGS OF THE COMBUSTION INSTITUTE,40(1-4),7. |
| MLA | 于德海,et al."Theoretical analysis on the forced ignition of a quiescent mixture by heat and radical sources".PROCEEDINGS OF THE COMBUSTION INSTITUTE 40.1-4(2024):7. |
入库方式： OAI收割
来源：力学研究所
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