Local quenching recovery mechanisms of interacting lean premixed and diffusion turbulent flames

Yuji Yahagi, Ryoji Kaminishi, Takayuki Kawanami, Ikuyo Makino

研究成果: Conference contribution

抄録

Local quenching recovery mechanisms of lean premixed CH4 air flame (LPF) and lean CH4 diluted with N2 diffusion flame (LDF) have been investigated experimentally for fundamental studies in heterogeneous mixture combustion. The local quenching phenomena are frequently observed with approaching the extinction limit. However, in many cases, the flame can recover from the local quenching phenomena. Two distinct local quenching recovery mechanisms, a passive local quenching recovery mode and an active local quenching recovery mode, have been observed. In the passive local quenching recovery mode, the local quenching occurs outside of the flame stability point and the flames can be automatically recovered from the local quenching phenomena in accordance with the flow field properties. In the active local quenching recovery mode, local quenching occurs including the flame stability point. In this case, the local flamelet propagation plays a key role to the recovery mechanism. The mechanism works well in the turbulence added in the premixed gas and also the mixture has to be in the self-propagating condition. In addition, the local quenching area might recover by the reacting flow transported by the eddy.

本文言語English
ホスト出版物のタイトルFall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009 Fall Meeting
出版社Western States Section/Combustion Institute
ページ734-741
ページ数8
2
ISBN(印刷版)9781615676507
出版ステータスPublished - 2009
イベントFall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009 - Irvine, United States
継続期間: 2009 10 262009 10 27

Other

OtherFall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009
国/地域United States
CityIrvine
Period09/10/2609/10/27

ASJC Scopus subject areas

  • 化学工学(全般)
  • 物理化学および理論化学
  • 機械工学

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