Ignition transition in randomly stirred explosive gases

S. S. Shy, W. T. Shih, C. C. Liu, H. C. Chen

Research output: Contribution to conferencePaperpeer-review

Abstract

Two distinct modes on ignition in randomly stirred explosive gases are found depending on a Karlovitz number (Ka) indicating the time ratio between chemical reaction and turbulence. For Ka < Kac ≈ 2 ~ 10 depending on mixture fractions, minimum ignition energy (MIE) increases gradually with Ka, centrally-ignited flame kernel remains laminar torus, and outwardly-propagating turbulent flame has sharp front. For Ka > Kac, MIE increases abruptly, flame kernel is disrupted, and randomly-propagating turbulent flame has broadening front, showing distributed combustion for the first time.

Original languageEnglish
StatePublished - 2009
Event7th Asia-Pacific Conference on Combustion, ASPACC 2009 - Taipei, Taiwan
Duration: 24 May 200927 May 2009

Conference

Conference7th Asia-Pacific Conference on Combustion, ASPACC 2009
Country/TerritoryTaiwan
CityTaipei
Period24/05/0927/05/09

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