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 language | English |
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State | Published - 2009 |
Event | 7th Asia-Pacific Conference on Combustion, ASPACC 2009 - Taipei, Taiwan Duration: 24 May 2009 → 27 May 2009 |
Conference
Conference | 7th Asia-Pacific Conference on Combustion, ASPACC 2009 |
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Country/Territory | Taiwan |
City | Taipei |
Period | 24/05/09 → 27/05/09 |