| Effects of the non-reactive layer on dynamic behaviors of H2-Air detonations in a microchannel | |
Li HY(李昊洋)1,2; Yang PF(杨鹏飞)1,2 ; Wang C(王春)1,2
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| Corresponding Author | Yang, Pengfei([email protected]) |
| Source Publication | FUEL
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| 2024-09-01 | |
| Volume | 371Pages:11 |
| ISSN | 0016-2361 |
| Abstract | Detonation waves propagating in a confined microchannel with the inhomogeneous medium are investigated numerically by solving the Euler equations coupled with a detailed chemical reaction model. The non-reactive layer with finite thickness is introduced into the reactive medium. Three variables, i.e., non-reactive layer thickness HI, reactive layer thickness HR and their ratio HI/HR, are varied to discuss their effects on propagation modes, detonation velocities and cellular structures in detail. The results indicate that increasing HI or decreasing HR is adverse to the self-sustaining propagation of the detonation waves, associated with the decrease of average velocity and the increase of detonation cell size. Additionally, the study introduces a dimensionless parameter, HI/HR, to evaluate the dynamic behaviors of detonation waves. This approach contrasts with prior research, which solely relied on HR as a criterion and assumed the critical HR to be unaffected by the non-reactive gas layer. With the increase of HI/HR, the propagation mode of detonation wave will change from the stable state to the unstable state. And there is a critical value HI/HR. Exceeding this value, the detonation waves cannot propagate continuously in the millimeter-scaled channel. Notably, the critical HI/HR is constant (HI/HR approximate to 0.165) for the microchannel when the channel width HT is less than 10 mm, implying the HR is linearly correlated with the HI. This key finding has been omitted by previous studies because their non-reactive layers are usually assumed to be infinite. As HT increases beyond 10 mm, the critical value of HI/HR also rises. When HT approaches infinity, HI/HR similarly trends toward infinity, suggesting that the critical HR becomes independent of HI. These phenomena show that the thickness of the non-reactive layer in the microchannel needs to be carefully addressed, and the coupling relationship of flow and heat release is different from the detonation wave in the macro-size channel. |
| Keyword | Detonation wave Propagation modes Inhomogeneous medium Detonation velocity |
| DOI | 10.1016/j.fuel.2024.131940 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001345492500001 |
| WOS Keyword | GASEOUS DETONATION ; PROPAGATION ; SIMULATION ; MIXTURES |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| Funding Project | National Natural Science Founda-tion of China (NSFC)[12202014] ; National Natural Science Founda-tion of China (NSFC)[12072353] ; National Natural Science Founda-tion of China (NSFC)[12132017] |
| Funding Organization | National Natural Science Founda-tion of China (NSFC) |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Yang, Pengfei |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/97131 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Li HY,Yang PF,Wang C. Effects of the non-reactive layer on dynamic behaviors of H2-Air detonations in a microchannel[J]. FUEL,2024,371:11.Rp_Au:Yang, Pengfei |
| APA | 李昊洋,杨鹏飞,&王春.(2024).Effects of the non-reactive layer on dynamic behaviors of H2-Air detonations in a microchannel.FUEL,371,11. |
| MLA | 李昊洋,et al."Effects of the non-reactive layer on dynamic behaviors of H2-Air detonations in a microchannel".FUEL 371(2024):11. |
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