Experimental investigation of mode transition process in a cavity-based scramjet

doi:10.1063/5.0193282

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Experimental investigation of mode transition process in a cavity-based scramjet
	Meng, Yu 1,2; Sun, Wenming 1; Gu, Hongbin 1; Chen, Fang 2
刊名	PHYSICS OF FLUIDS
	2024-04-01
卷号	36 期号:4 页码:11
ISSN号	1070-6631
DOI	10.1063/5.0193282
通讯作者	Gu, Hongbin(guhb@imech.ac.cn)
英文摘要	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.
资助项目	Nature Science Foundation of Chongqing, China[cstc2021jcyj-msxmX1118] ; Natural Science Foundation of Chongqing, China[11772342] ; National Natural Science Foundation of China
WOS关键词	COMBUSTION MODES ; SUPERSONIC COMBUSTION ; IGNITION
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001194738900011
资助机构	Nature Science Foundation of Chongqing, China ; Natural Science Foundation of Chongqing, China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94917]
专题	力学研究所_高温气体动力学国家重点实验室
通讯作者	Gu, Hongbin
作者单位	1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.Shanghai Jiao Tong Univ, Sch Aeronaut & Astronaut, Shanghai 200240, Peoples R China
推荐引用方式 GB/T 7714	Meng, Yu,Sun, Wenming,Gu, Hongbin,et al. Experimental investigation of mode transition process in a cavity-based scramjet[J]. PHYSICS OF FLUIDS,2024,36(4):11.
APA	Meng, Yu,Sun, Wenming,Gu, Hongbin,&Chen, Fang.(2024).Experimental investigation of mode transition process in a cavity-based scramjet.PHYSICS OF FLUIDS,36(4),11.
MLA	Meng, Yu,et al."Experimental investigation of mode transition process in a cavity-based scramjet".PHYSICS OF FLUIDS 36.4(2024):11.