球状伝播層流火炎の不安定性とセル状化に及ぼす圧力の影響: 第2報, セル状火炎の不安定性波数

北川 敏明, 小川 知美, 永野 幸秀

研究成果: Contribution to journalArticle査読

抄録

Cellularity of the propagating spherical laminar flames induced by the flame instability was studied for methane and propane-air mixtures at the equivalence ratios from 0.8 to 1.3 and the initial pressure from 0.10 to 0.50MPa. The Markstein number was employed to quantify the effects of the equivalence ratio and the pressure of the mixture on the cellularity due to the flame instability. The flame was unstable at the large Peclet number. Cracks due to the flame instability were formed on the flame during the propagation. As the flame propagated, cracks increased and then the flame became cellular. The flame divided by the cracks was stabilized by the increase in the flame stretch. The non-dimensional wave number of the instability increased with the flame propagation. This wave number increased with decreasing the equivalence ratio for the methane mixture and with increasing the equivalence ratio for the propane mixture. It increased with increasing the initial pressure at all the equivalence ratios. It increased as the Markstein number decreased.
寄稿の翻訳タイトルEffects of Pressure on Instability and Cellularity of Propagating Spherical Laminar Flames: 2nd Report, Instability Wave Number of Cellular Flame
本文言語日本語
ページ(範囲)3232-3238
ページ数7
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
70
700
出版ステータス出版済み - 12 25 2004

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「球状伝播層流火炎の不安定性とセル状化に及ぼす圧力の影響: 第2報, セル状火炎の不安定性波数」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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