| Experimental investigation of mode transition process in a cavity-based scramjet | |
Meng Y(孟宇)1,2 ; Sun WM(孙文明)2; Gu HB(顾洪斌)2; Chen, Fang1
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| Corresponding Author | Gu, Hongbin(guhb@imech.ac.cn) |
| Source Publication | PHYSICS OF FLUIDS
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| 2024-04-01 | |
| Volume | 36Issue:4Pages:11 |
| ISSN | 1070-6631 |
| Abstract | A directly connected transient scramjet simulator was developed for supersonic combustion experiments to gain a deeper understanding of the process and mechanism of mode transitions in dual-mode scramjet engines. This study presents experimental simulations of flame development under constant combustor inlet conditions with increasing equivalence ratios, utilizing advanced high-speed measurement techniques such as high-frequency static pressure, schlieren imaging, and methylene radical chemiluminescence. The results demonstrated that abrupt changes occurred during the mode transition as the equivalence ratio increased. Specifically, lower equivalence ratios correspond to the shear layer mode, whereas higher equivalence ratios correspond to the jet-wake and jet-front modes. The stable position of the precombustion shock wave is determined by the heat released during combustion, whereas both the precombustion shock wave and the fuel-injection depth determine the combustion mode and flame-anchoring position. Finally, the dynamic variation of shock waves inside the combustor is significant in contributing to abrupt mode transitions. |
| DOI | 10.1063/5.0193282 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001194738900011 |
| WOS Keyword | COMBUSTION MODES ; SUPERSONIC COMBUSTION ; IGNITION |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | Nature Science Foundation of Chongqing, China[cstc2021jcyj-msxmX1118] ; Natural Science Foundation of Chongqing, China[11772342] ; National Natural Science Foundation of China |
| Funding Organization | Nature Science Foundation of Chongqing, China ; Natural Science Foundation of Chongqing, China ; National Natural Science Foundation of China |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Gu, Hongbin |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94918 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Shanghai Jiao Tong Univ, Sch Aeronaut & Astronaut, Shanghai 200240, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Meng Y,Sun WM,Gu HB,et al. Experimental investigation of mode transition process in a cavity-based scramjet[J]. PHYSICS OF FLUIDS,2024,36,4,:11. |
| APA | 孟宇,孙文明,顾洪斌,&Chen, Fang.(2024).Experimental investigation of mode transition process in a cavity-based scramjet.PHYSICS OF FLUIDS,36(4),11. |
| MLA | 孟宇,et al."Experimental investigation of mode transition process in a cavity-based scramjet".PHYSICS OF FLUIDS 36.4(2024):11. |
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