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Proceedings Paper

Dynamics character of swirling flame investigated by OH and CH2O planar laser-induced fluorescence
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Paper Abstract

The 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).

Paper Details

Date Published: 29 March 2019
PDF: 10 pages
Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 110460Q (29 March 2019); doi: 10.1117/12.2524456
Show Author Affiliations
Hao Yan, Institute of Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Shaohua Zhang, Institute of Mechanics (China)
Xilong Yu, Institute of Mechanics (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 11046:
Fifth International Symposium on Laser Interaction with Matter
YiJun Zhao, Editor(s)

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