Flame structure and dynamics characters investigation by OH and CH2O planar laser-induced fluorescence in the swirl combustor

被引：0
作者：
Yan H. [1 ,2 ]
Zhang S. [1 ]
Yu X. [1 ,2 ]
Li F. [1 ]
Lin X. [1 ]
机构：
[1] State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing
[2] School of Engineering Science, University of Chinese Academy of Sciences, Beijing
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 04期
关键词：
Combustor; Dynamics modes; Laser-induced fluorescence; Proper orthogonal decomposition; Swirling flame;
D O I：
10.13224/j.cnki.jasp.2019.04.019
中图分类号：
学科分类号：
摘要：
The swirl combustor model of aircraft engine under fuel-lean condition was characterized by planar laser-induced fluorescence (PLIF) technique. By taking PLIF measurements of OH and CH2O simultaneously, the transient structures of the reaction zone and preheat zone were investigated under various operation points. By applying proper orthogonal decomposition (POD) method to the OH PLIF data, the main dynamics modes of the swirling flame were extracted, and by applying extended proper orthogonal decomposition (EPOD) method, CH2O PLIF signal distribution for each POD mode was unveiled. The experimental results indicate that as the thermal power of the combustor increases, the time-averaged structure and dynamics modes experience notable transitions. As the flame elevated, the flame exhibits stronger axial instability, while the deformation caused by precessing vortex core (PVC) is decreased. At relative high thermal power, unburnt fuel emerges in the external recirculation zone (ERZ). © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：894 / 907
页数：13
相关论文
共 23 条
  • [1] Syred N., A review of oscillation mechanisms and the role of the precessing vortex core (PVC) in swirl combustion systems, Progress in Energy and Combustion Science, 32, 2, pp. 93-161, (2006)
  • [2] Renard P.H., Thevenin D., Rolon J.C., Et al., Dynamics of flame/vortex interactions, Progress in Energy and Combustion Science, 26, 3, pp. 225-282, (2000)
  • [3] Candel S., Durox D., Schuller T., Et al., Dynamics of swirling flames, Annual Review of Fluid Mechanics, 46, 1, pp. 147-161, (2013)
  • [4] Crosley D.R., Smith G.P., Laser-induced fluorescence spectroscopy for combustion diagnostics, Optical Engineering, 22, 5, pp. 545-553, (1983)
  • [5] Hanson R.K., Seitzman J.M., Paul P.H., Planar laser-fluorescence imaging of combustion gases, Applied Physics B, 50, 6, pp. 441-454, (1990)
  • [6] Kohse-Hoinghaus K., Laser techniques for the quantitative detection of reactive intermediates in combustion systems, Progress in Energy and Combustion Science, 20, 3, pp. 203-279, (1994)
  • [7] Yu X., Yang Z., Peng J., Et al., Quantitative measurements of one-dimensional OH absolute concentration profiles in a methane/air flat flame by bi-directional laser-induced fluorescence, Chinese Physics B, 24, 11, (2015)
  • [8] Lee T., Bessler W.G., Kronemayer H., Et al., Quantitative temperature measurements in high-pressure flames with multiline NO-LIF thermometry, Applied Optics, 44, 31, pp. 6718-6728, (2005)
  • [9] Cattolica R., OH rotational temperature from two-line laser-excited fluorescence, Applied Optics, 20, 7, pp. 1156-1166, (1981)
  • [10] Li Z.S., Li B., Sun Z.W., Et al., Turbulence and combustion interaction: high resolution local flame front structure visualization using simultaneous single-shot PLIF imaging of CH, OH and CH<sub>2</sub>O in a piloted premixed jet flame, Combustion and Flame, 157, 6, pp. 1087-1096, (2010)
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