CH_4/空気予混合乱流火炎中の極微量化学種の可視化

概要

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Two-dimensional mapping of CH, CN and NH intermediates in a turbulent flame cross section, which concerns prompt NO formation, has been obtained by the PLIF technique. These results are achieved under low concentration and low quantum yield conditions (that is, a CH_4/air flame at atmospheric pressure), by drawing the potential of a high-sensitivity image intensifier capable of photon signal detection by optimizing both the excitation-detection scheme and the light-collecting optics. Thanks to these improvements, semi quantitative CH measurement has been achieved utilizing predissociation. In addition, 2-D imaging of CN (sub ppm) and NH (0.01-0.1 ppm) has been achieved by a single laser pulse in a CH_4/air flame, showing that the record of low concentration species detection by PLIF has been improved by an order of 1-2. The authors believe that these visualization techniques will mean a great improvement in the prompt No formation diagnostics in flames.
社団法人日本機械学会の論文
1994-09-25