Combustion Characteristics and Flame Behavior of Premixed Mixtures Supported by Pilot Flames with Different Equivalence Ratio

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  • 異なる当量比を持つ混合気により保炎された予混合火炎の燃焼特性と挙動
  • コトナル トウリョウヒ オ モツ コンゴウキ ニ ヨリ ホエン サレタ ヨ コンゴウ カエン ノ ネンショウ トクセイ ト キョドウ

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Abstract

<p>In this study, we have investigated the combustion characteristics of premixed mixtures supported by pilot flames with different equivalence ratio. The flame behavior was measured by OH-PLIF imaging. The turbulent flames were stabilized in a cyclone-jet combustor. The fuel was propane. The main jet velocity and the cyclone jet velocity were fixed at 10 or 30 m/s. On the other hand, these equivalence ratios were widely changed. When the extinction limit was measured, the equivalence ratio of the main jet was decreased by keeping that of the cyclone jet in the range of φp = 0 - 5.0. The overall equivalence ratio was one parameter for discussing the flame stability and the emission characteristics. Results showed that the equivalence ratio of the cyclone jet greatly affected the flame extinction limit. The soot concentration was almost zero for all conditions in this experimental condition. EINOx was smaller as the overall equivalence ratio decreased.</p>

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