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首页> 外文期刊>Applied optics >Vortex-induced flame extinction in two-phase counterflow diffusion flames with CH planar laser-induced fluorescence and particle-image velocimetry
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Vortex-induced flame extinction in two-phase counterflow diffusion flames with CH planar laser-induced fluorescence and particle-image velocimetry

机译：CH平面激光诱导的荧光和粒子图像测速技术在两相逆流扩散火焰中涡旋熄灭

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Here the interaction between a laminar two-phase, non-pre-mixed counterflow flame and a vortex is examined. Special emphasis is given to the influence of different flame and vortex parameters on the extinction behavior of the flame. Simultaneaous planar laser-induced fluorescence of the CH radical layer produced by the flame and particle-image velocimetry measurements of the flowfield are used to characterize the flame-vortex interaction. These simultaneous diagnostics are used for the first time in this configuration. The extinction processes occurring during the flame-vortex interaction can be analyzed by this method, especially the influence of strain at the flame surface. The influence of the droplets on the extinction behavior appears clearly compared with a fully gaseous flame. The spray flame is weaker and extinguishes earlier than does a gaseous flame. In the measurements an additional broadband signal in the vicinity of the CH layer is probably due to the induced fluorescence of polycyclic aromatic hydrocarbons, excited at the same wavelength.
机译：在此，检查了层流两相，非预混合逆流火焰和涡旋之间的相互作用。特别强调了不同火焰和涡流参数对火焰消光行为的影响。由火焰和流场的粒子图像测速仪测量同时产生平面激光诱导的CH自由基层的荧光，以表征火焰涡旋相互作用。这些同步诊断在此配置中首次使用。可以通过这种方法分析在火焰-涡旋相互作用期间发生的消光过程，尤其是应变在火焰表面的影响。与完全气态火焰相比，液滴对消光行为的影响似乎很明显。喷雾火焰比气态火焰更弱并且更早熄灭。在测量中，CH层附近的另一个宽带信号可能是由于在相同波长激发的多环芳烃的荧光所致。

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    《Applied optics》 |2003年第12期|共9页
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