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Study on Flame Stabilization in a Dual-Mode Combustor Using Optical Measurements
Yuan YM(袁越明); Zhang TC(张泰昌); Yao W(姚卫); Fan XJ(范学军); Fan, XJ (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
Source PublicationJOURNAL OF PROPULSION AND POWER
2015-12
Volume31Issue:6Pages:1524-1531
ISSN0748-4658
AbstractFlame stabilization in a dual-mode scramjet combustor was studied using simultaneous detection of flowfield and reaction zone. The instantaneous reactive flowfield was clearly visualized using an improved pulsed schlieren system, whereas the reaction zone was marked by CH* chemiluminescence. Experiments were performed in a Mach 2.5 model combustor with the total temperature of 1275 +/- 25 K and the total pressure of 1.0 MPa. Ethylene was used as fuel with equivalence ratios varied from 0.258 to 0.411. Four typical flame stabilized locations and corresponding flowfields are presented. When no choke occurs, the flame is stabilized in the cavity or the shear layer. Schlieren images show that the flow in the reaction zone of the latter case is supersonic. When the combustor is choked at the injection location, the flame oscillates between the shear layer and the jet wake, and the flow in the reaction zone becomes subsonic. When the flame is stabilized in the jet wake, autoignition can occur due to the compression of precombustion shock train. The short-lived aerodynamic throat formed near the injection location may be the possible cause for triggering the unsteady flame oscillation. The effects of heat release on flame stabilization modes are discussed.
DOI10.2514/1.B35689
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000368248000002
WOS KeywordSUPERSONIC-COMBUSTION ; SCRAMJET ENGINE ; CAVITY FLAMEHOLDER ; KEROSENE ; MECHANISMS ; IGNITION ; FLOW
WOS Research AreaEngineering
WOS SubjectEngineering, Aerospace
Funding OrganizationCurrent research program at the Chinese Academy of Sciences was supported by the National Nature Science Foundation of China under contract number 91016005, 10621202, and the Youth Innovation Fund of LHD. The authors would like to acknowledge G. Yu, J. R. Zhao, L. J. Meng, and X. S. Wei for their helpful discussion and technique support.
DepartmentLHD超声速燃烧
Classification二类/Q2
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58638
Collection高温气体动力学国家重点实验室
Corresponding AuthorFan, XJ (reprint author), Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Yuan YM,Zhang TC,Yao W,et al. Study on Flame Stabilization in a Dual-Mode Combustor Using Optical Measurements[J]. JOURNAL OF PROPULSION AND POWER,2015,31(6):1524-1531.
APA 袁越明,张泰昌,姚卫,范学军,&Fan, XJ .(2015).Study on Flame Stabilization in a Dual-Mode Combustor Using Optical Measurements.JOURNAL OF PROPULSION AND POWER,31(6),1524-1531.
MLA 袁越明,et al."Study on Flame Stabilization in a Dual-Mode Combustor Using Optical Measurements".JOURNAL OF PROPULSION AND POWER 31.6(2015):1524-1531.
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