Study of thermo-diffusive effects on iso-octane/air flames at fixed turbulence Karlovitz number

Akihiro Hayakawa, Tomohiro Takeo, Yukito Miki, Yukihide Nagano, Toshiaki Kitagawa

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

3 被引用数 (Scopus)

抄録

Spherically propagating laminar and turbulent flames were studied using iso-octane / air mixtures with and without dilution. The main purpose of this study is to clarify the influence of thermo-diffusive effects on the turbulent flames. In order to examine the thermo-diffusive effects solely by separating them from the effects of flame stretch, turbulent burning velocities were compared at constant flame stretch factors. The mean flame stretch factor acting on turbulent flame front may be represented by the turbulence Karlovitz number. Thus, turbulent explosions were carried out at fixed turbulence Karlovitz numbers. The ratio of turbulent burning velocity to unstretched laminar burning velocity increased with the equivalence ratio for non-diluted mixtures at fixed turbulence Karlovitz numbers. And this ratio for CO2 diluted mixtures was larger than N2 diluted mixtures. The Markstein number that denotes the sensitivity of the flame to thermo-diffusive effects depends on the equivalence ratio and diluents of the mixture. The ratio of turbulent burning velocity to unstretched laminar one increased with decreasing Markstein number. Especially, it changed stepwise around Markstein number of zero. However, the burning velocity ratios did not increase with increasing mixture pressure although the Markstein number decreased with pressure.

本文言語英語
ホスト出版物のタイトルASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011
出版社American Society of Mechanical Engineers
ISBN(印刷版)9780791838921
DOI
出版ステータス出版済み - 2011
イベントASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011 - Honolulu, HI, 米国
継続期間: 3 13 20113 17 2011

出版物シリーズ

名前ASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011

その他

その他ASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011
国/地域米国
CityHonolulu, HI
Period3/13/113/17/11

All Science Journal Classification (ASJC) codes

  • エネルギー工学および電力技術

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