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Dynamics character of swirling flame investigated by OH and CH2O planar laser-induced fluorescence
Yan H(严浩); Zhang SH(张少华); 余西龙 Yu, Xilong
Source PublicationFIFTH INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER
2019
Pages110460Q
Conference Name5th International Symposium on Laser Interaction with Matter (LIMIS)
Conference DateNOV 11-13, 2018
Conference PlaceChangsha, PEOPLES R CHINA
AbstractThe model combustor of aircraft engine under fuel-lean condition is characterized by planar laser-induced fluorescence (PLIF) technique. By imaging the fluorescence from OH and CH2O simultaneously under various operation points, the transient structures of the reaction zone and preheat zone have been investigated. By the application of proper orthogonal decomposition (POD) and extended POD (EPOD) methods to the OH PLIF and CH2O PLIF data, the main dynamics modes of the swirling flame are extracted, as well as the CH2O PLIF signal distribution for each POD mode. The experimental results indicate that as the thermal power of the combustor increases, the time-averaged structure and dynamics modes experience notable transitions. At relatively high flow rate, local extinction occurs and unburnt fuel emerges in the external recirculation zone (ERZ).
Keywordlaser induced fluorescence swirling flame OH CH2O proper orthogonal decomposition
WOS IDWOS:000470011400025
Funding OrganizationNational Natural Science Foundation of ChinaNational Natural Science Foundation of China [11672359]
ISBN978-1-5106-2759-8
Indexed ByCPCI-S ; EI
Language英语
Citation statistics
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/80463
Collection高温气体动力学国家重点实验室
Affiliation1.Chinese Acad Sci, State Key Lab High Temp Gas Dynam, Inst Mech, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
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Yan H,Zhang SH,余西龙 Yu, Xilong. Dynamics character of swirling flame investigated by OH and CH2O planar laser-induced fluorescence[C]FIFTH INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER,2019:110460Q.
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