Properties of ethanol laminar and turbulent premixed flames

Kazutaka Ohara; Masayoshi Tsukikawa; Yousuke Araki; Akihiro Hayakawa; Shoichi Kobayashi; Toshiaki Kitagawa

Properties of ethanol laminar and turbulent premixed flames

Kazutaka Ohara, Masayoshi Tsukikawa, Yousuke Araki, Akihiro Hayakawa, Shoichi Kobayashi, Toshiaki Kitagawa

研究成果: Paper › 査読

抄録

Spherically propagating laminar and turbulent flames at elevated pressures in a large volume bomb were studied using ethanol-air mixtures. Experiments were carried out at the equivalence ratio 0.8 1.0 and 1.4 varying the initial pressure from 0.10 to 0.50 MPa. Turbulence intensity of the mixture was 0.80 and 1.59 m/s. The unstretched laminar burning velocity, u_l decreased as the initial pressure increased. The ratio of the turbulent burning velocity to u_l increased with increasing the ratio of turbulence intensity to u_l and turbulence Karlovitz number. This burning velocity ratio was large for rich flames. Thermo-diffusive effects might be more influential to rich ethanol flames because of the small Lewis number. This burning velocity ratio was also found to increase with increasing initial pressure.

本文言語	English
出版ステータス	Published - 2009 1月 1
外部発表	はい
イベント	9th International Conference on Power Engineering, ICOPE 2009 - Kobe, Japan 継続期間: 2009 11月 16 → 2009 11月 20

Other

Other	9th International Conference on Power Engineering, ICOPE 2009
国/地域	Japan
City	Kobe
Period	09/11/16 → 09/11/20

ASJC Scopus subject areas

電子工学および電気工学
エネルギー工学および電力技術
燃料技術

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引用スタイル

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title = "Properties of ethanol laminar and turbulent premixed flames",

abstract = "Spherically propagating laminar and turbulent flames at elevated pressures in a large volume bomb were studied using ethanol-air mixtures. Experiments were carried out at the equivalence ratio 0.8 1.0 and 1.4 varying the initial pressure from 0.10 to 0.50 MPa. Turbulence intensity of the mixture was 0.80 and 1.59 m/s. The unstretched laminar burning velocity, ul decreased as the initial pressure increased. The ratio of the turbulent burning velocity to ul increased with increasing the ratio of turbulence intensity to ul and turbulence Karlovitz number. This burning velocity ratio was large for rich flames. Thermo-diffusive effects might be more influential to rich ethanol flames because of the small Lewis number. This burning velocity ratio was also found to increase with increasing initial pressure.",

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author = "Kazutaka Ohara and Masayoshi Tsukikawa and Yousuke Araki and Akihiro Hayakawa and Shoichi Kobayashi and Toshiaki Kitagawa",

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T1 - Properties of ethanol laminar and turbulent premixed flames

AU - Ohara, Kazutaka

AU - Tsukikawa, Masayoshi

AU - Araki, Yousuke

AU - Hayakawa, Akihiro

AU - Kobayashi, Shoichi

AU - Kitagawa, Toshiaki

PY - 2009/1/1

Y1 - 2009/1/1

N2 - Spherically propagating laminar and turbulent flames at elevated pressures in a large volume bomb were studied using ethanol-air mixtures. Experiments were carried out at the equivalence ratio 0.8 1.0 and 1.4 varying the initial pressure from 0.10 to 0.50 MPa. Turbulence intensity of the mixture was 0.80 and 1.59 m/s. The unstretched laminar burning velocity, ul decreased as the initial pressure increased. The ratio of the turbulent burning velocity to ul increased with increasing the ratio of turbulence intensity to ul and turbulence Karlovitz number. This burning velocity ratio was large for rich flames. Thermo-diffusive effects might be more influential to rich ethanol flames because of the small Lewis number. This burning velocity ratio was also found to increase with increasing initial pressure.

AB - Spherically propagating laminar and turbulent flames at elevated pressures in a large volume bomb were studied using ethanol-air mixtures. Experiments were carried out at the equivalence ratio 0.8 1.0 and 1.4 varying the initial pressure from 0.10 to 0.50 MPa. Turbulence intensity of the mixture was 0.80 and 1.59 m/s. The unstretched laminar burning velocity, ul decreased as the initial pressure increased. The ratio of the turbulent burning velocity to ul increased with increasing the ratio of turbulence intensity to ul and turbulence Karlovitz number. This burning velocity ratio was large for rich flames. Thermo-diffusive effects might be more influential to rich ethanol flames because of the small Lewis number. This burning velocity ratio was also found to increase with increasing initial pressure.

KW - Burning velocity

KW - Combustion

KW - Ethanol

KW - Lewis number

KW - Turbulent flame

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T2 - 9th International Conference on Power Engineering, ICOPE 2009

Y2 - 16 November 2009 through 20 November 2009

ER -

Properties of ethanol laminar and turbulent premixed flames

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