TED-AJ03-307 EXTINCTION AND INTERRUPTION OF DIFFUSION FLAME INTERACTED WITH A LARGE SCALE VORTEX MEASURED BY RAYLEIGH SCATTERING AND LIF
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概要
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Instantaneous and simultaneous measurements of two-dimensional temperature and OH-LIF profiles by combining Rayleigh scattering with laser induced fluorescence (LIF) were demonstrated in nitrogen-diluted hydrogen (H_2 30%+N_2 70%) diffusion flame interacted with a large scale vortex induced by the acoustic excitation at the fuel side. The dynamic behavior of the diffusion flame extinction and interruption during the flame-vortex interaction processes is investigated. The results obtained are described as follows. When a large velocity fluctuation is given to the fuel jet, the temperature and the OH_LIF at the reaction zone become significantly lowered at the convex and circumferential part of the vortex where the thinning of the OH-LIF and the temperature layer and the consequent flame extinction are induced. The burnt gas is pulled up from the upstream reaction zone by curling up motion of[figure] the vortex and high temperature region is formed inside the circumferential reaction zone. The high temperature gas dissipates with time and makes thick burnt gas region. The dissipated burnt gas reduces the supply of fuel into circumferential reaction zone and interruption of the reaction zone is induced. The reaction zone is interrupted at the circumferential part or tail part of the vortex. But, the interruption of the reaction zone is not recognized in the case that fuel is supplied into the circumferential reaction zone. When the circumferential reaction zone is interrupted, the reaction zone is formed inside the circumferential reaction zone and edge flame is formed at the circumferential part of the vortex and the inside reaction zone due to the shortage of fuel or air at the tip of the flame by the thick dissipated burnt gas.[figure]
- 一般社団法人日本機械学会の論文
著者
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KOMIYAMA Masaharu
Department of Chemistry, Yamanashi University
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Hayashi Akinori
Department Of Mechanophysics Engineering Osaka University
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Komiyama Masaharu
Department Of Chemistry Yamanashi University
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Komiyama Masaharu
Department Of Mechanophysics Engineering Osaka University
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Takagi Toshimi
Department Of Mechanophysics Engineering Osaka University
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Takagi Toshimi
Department Of Mechanical Engineering Faculty Of Engineering Osaka Sangyo University
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Kawabe Ryoji
Department of Mechanophysics Engineering, Graduate School of Engineering, Osaka University
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Kawabe Ryoji
Department Of Mechanophysics Engineering Osaka University
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Takagi Toshimi
Department Of Mechanical Engineering Alty Of Engineering. Osaka University
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Komiyama Masaharu
Department Of Chemistry Faculty Of Liberal Arts And Education Yamanashi University
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HAYASHI Akinori
Department of Cardiovasology, Surugadai Nihon University Hospital
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