| The role of low/high- temperature chemistry in computationally reproducing flame stabilization modes of hydrogen-fueled supersonic combustion | |
Wu K(吴坤)1; Zhang, Peng2; Galassi, RiccardoMalpica3; Fan XJ(范学军)1,4
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| Corresponding Author | Fan, Xuejun([email protected]) |
| Source Publication | COMBUSTION AND FLAME
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| 2024-11-01 | |
| Volume | 269Pages:17 |
| ISSN | 0010-2180 |
| Abstract | Numerical simulations of two typical flame stabilization modes in a cavity-assisted supersonic combustor were performed using improved delay detached eddy simulation and three hydrogen oxidation mechanisms with different levels of fidelity. The simulation results with Burke's detailed mechanism agree well with the experimental measurements in terms of flame morphology and wall pressure, in both jet-wake and cavity flame modes. The comparative study shows that, lacking necessary intermediate species, Eklund's reduced mechanism and Marinov's global mechanism incorrectly yield jet wake stabilization mode under low inflow stagnation temperature T 0 . Through computational singular perturbation analysis, a sequential radical triggering mechanism was identified for flame stabilization, wherein the reaction R1: H + O-2 = O + OH dominates in fuel jet wake forming OH and O radicals, the reaction R2: H-2 + O = H + OH controls the reaction between H-2 and O forming the OH radical pool, and then the heat release completes via R3: H-2 + OH = H + H2O. However, their activation differs in the two stabilization modes. The role of transport is key in the cavity flame mode, where the colder stream inhibits auto-ignition in the jet wake, activating low-temperature chemistry, and delaying R2 in the cavity region. Thus, the presence of H2O2 and HO2 species was found to be essential for accurately reproducing the flame stabilization in the cavity flame stabilization mode, whereas their effect is marginal in jet wake mode. In fact, the jet-wake flame stabilization is characterized by auto-ignition under high inflow stagnation temperatures, with the chain-branching reaction R2 activating in the fuel jet-wake, causing an explosive dynamic therein. These findings suggest the H2O2 and HO2 species and associated low-temperature reactions are necessary for the accurate prediction of the flame stabilization mode under low T-0, whereas their absence does not affect the prediction of the flame mode under high T-0, in which case all three chemical mechanisms give reasonably good agreements in flame characteristics and engine overall performances. |
| Keyword | Supersonic combustion Flame stabilization Numerical simulation Chemistry modeling CSP/TSR analysis |
| DOI | 10.1016/j.combustflame.2024.113711 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001321651900001 |
| WOS Keyword | LARGE-EDDY SIMULATION ; STRETCHING RATE TSR ; SCRAMJET COMBUSTOR ; NUMERICAL-SIMULATION ; REACTION-MECHANISMS ; IGNITION |
| WOS Research Area | Thermodynamics ; Energy & Fuels ; Engineering |
| WOS Subject | Thermodynamics ; Energy & Fuels ; Engineering, Multidisciplinary ; Engineering, Chemical ; Engineering, Mechanical |
| Funding Project | Italian Ministry of University and Research - EU ; National Natural Science Foundation of China[52176134] |
| Funding Organization | Italian Ministry of University and Research - EU ; National Natural Science Foundation of China |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Fan, Xuejun |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96893 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 2.City Univ Hong Kong, Dept Mech Engn, Kowloon Tong, Hong Kong 999077, Peoples R China; 3.Sapienza Univ Roma, Dept Mech & Aerosp Engn, I-00184 Rome, Italy; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Wu K,Zhang, Peng,Galassi, RiccardoMalpica,et al. The role of low/high- temperature chemistry in computationally reproducing flame stabilization modes of hydrogen-fueled supersonic combustion[J]. COMBUSTION AND FLAME,2024,269:17.Rp_Au:Fan, Xuejun |
| APA | 吴坤,Zhang, Peng,Galassi, RiccardoMalpica,&范学军.(2024).The role of low/high- temperature chemistry in computationally reproducing flame stabilization modes of hydrogen-fueled supersonic combustion.COMBUSTION AND FLAME,269,17. |
| MLA | 吴坤,et al."The role of low/high- temperature chemistry in computationally reproducing flame stabilization modes of hydrogen-fueled supersonic combustion".COMBUSTION AND FLAME 269(2024):17. |
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