| Stability of Gas Diffusion Flame in Laterally Confined Space | |
Wang XZ(王秀珍)1,2 ; Zhu F(朱凤)1; Wang SF(王双峰)1,2
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| Corresponding Author | Zhu, Feng([email protected]) |
| Source Publication | JOURNAL OF THERMAL SCIENCE
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| 2024-09-13 | |
| Pages | 13 |
| ISSN | 1003-2169 |
| Abstract | Lateral-confined coaxial jet diffusion flame is common in micro thrusters, and the specific impulse is mainly obtained through thermodynamic calculations with an assumption of fuel combustion with an equivalence ratio, regardless of the stability of the combustion process. However, the flame behavior plays an important impact on the performance of a micro thruster through the varied combustion efficiency. The stability of confined coaxial jet diffusion flames with air coflow was studied by experiments and numerical simulation. Methane, hydrogen, and propane were used as fuels. Flame attachment, liftoff, blowout (extinction limits of lifted flame), and blowoff (extinction limits of attached flame) behaviors with the effect of confinement ratios and fuel properties were focused on. Among the range of the jet flow velocity in this research, the hydrogen flame is always attached to the jet exit, the flame tip goes from closed to open as the jet velocity increases, while the flame transitions from attachment to liftoff in the case of CH4 and C3H8. Further, in a narrow confined space, the attached flame for both CH4 and C3H8 undergoes liftoff followed by blowout. However, in a space with a high confinement ratio, the CH4 flame transitions directly from attachment to blowoff. The critical modified Craya-Curtet number, which is used to predict the onset of the recirculation, is determined through simulation and experiment, and the number is about 1.77. This work provides valuable data on flame stability inside a confined space and gives insights into the design of a thruster. |
| Keyword | jet diffusion flame Craya-Curtet number flame stability confined space |
| DOI | 10.1007/s11630-024-2033-x |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:001311951300001 |
| WOS Keyword | COMBUSTION CHARACTERISTICS ; PRESSURE ; DYNAMICS ; METHANE |
| WOS Research Area | Thermodynamics ; Engineering |
| WOS Subject | Thermodynamics ; Engineering, Mechanical |
| Funding Project | Space Application System of China Manned Space Program ; National Key Research and Development Program of China[2022YFF0504500] |
| Funding Organization | Space Application System of China Manned Space Program ; National Key Research and Development Program of China |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Zhu, Feng |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96606 |
| Collection | 微重力重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Wang XZ,Zhu F,Wang SF. Stability of Gas Diffusion Flame in Laterally Confined Space[J]. JOURNAL OF THERMAL SCIENCE,2024:13.Rp_Au:Zhu, Feng |
| APA | 王秀珍,朱凤,&王双峰.(2024).Stability of Gas Diffusion Flame in Laterally Confined Space.JOURNAL OF THERMAL SCIENCE,13. |
| MLA | 王秀珍,et al."Stability of Gas Diffusion Flame in Laterally Confined Space".JOURNAL OF THERMAL SCIENCE (2024):13. |
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