Ignition transition in randomly stirred explosive gases

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

Ignition transition in randomly stirred explosive gases

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

Department of Mechanical Engineering

Research output: Contribution to conference › Paper › peer-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 < Ka_c ≈ 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 > Ka_c, 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
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
Country/Territory	Taiwan
City	Taipei
Period	24/05/09 → 27/05/09

Cite this

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title = "Ignition transition in randomly stirred explosive gases",

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.",

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TY - CONF

T1 - Ignition transition in randomly stirred explosive gases

AU - Shy, S. S.

AU - Shih, W. T.

AU - Liu, C. C.

AU - Chen, H. C.

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85071566396&partnerID=8YFLogxK

M3 - 會議論文

AN - SCOPUS:85071566396

T2 - 7th Asia-Pacific Conference on Combustion, ASPACC 2009

Y2 - 24 May 2009 through 27 May 2009

ER -

Ignition transition in randomly stirred explosive gases

Abstract

Conference

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