### 抄録

Lewis number represents the thermo-diffusive effects on laminar flames. That of hydrogen-air mixture varies extensively with the equivalence ratio due to the high molecular diffusivity of hydrogen. In this study, the influences of pressure and thermo-diffusive effects on spherically propagating premixed hydrogen-air turbulent flames were studied using a constant volume fan-stirred combustion vessel. It was noted that the ratio of the turbulent to unstretched laminar burning velocity increased with decreasing equivalence ratio and increasing mixture pressure. Turbulent burning velocity was dominated by three factors: (1) purely hydrodynamic factor, turbulence Reynolds number, (2) relative turbulence intensity to reaction speed, the ratio of turbulence intensity to unstretched laminar burning velocity, and (3) sensitivity of the flame to the stretch due to the thermo-diffusive effects, Lewis and Markstein numbers. A turbulent burning velocity correlation in terms of Reynolds and Lewis numbers is presented.

元の言語 | 英語 |
---|---|

ページ（範囲） | 5842-5849 |

ページ数 | 8 |

ジャーナル | International Journal of Hydrogen Energy |

巻 | 33 |

発行部数 | 20 |

DOI | |

出版物ステータス | 出版済み - 10 2008 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology

### これを引用

*International Journal of Hydrogen Energy*,

*33*(20), 5842-5849. https://doi.org/10.1016/j.ijhydene.2008.06.013

**Turbulent burning velocity of hydrogen-air premixed propagating flames at elevated pressures.** / Kitagawa, Toshiaki; Nakahara, Takashi; Maruyama, Kosuke; Kado, Kunihiro; Hayakawa, Akihiro; Kobayashi, Shoichi.

研究成果: ジャーナルへの寄稿 › 記事

*International Journal of Hydrogen Energy*, 巻. 33, 番号 20, pp. 5842-5849. https://doi.org/10.1016/j.ijhydene.2008.06.013

}

TY - JOUR

T1 - Turbulent burning velocity of hydrogen-air premixed propagating flames at elevated pressures

AU - Kitagawa, Toshiaki

AU - Nakahara, Takashi

AU - Maruyama, Kosuke

AU - Kado, Kunihiro

AU - Hayakawa, Akihiro

AU - Kobayashi, Shoichi

PY - 2008/10

Y1 - 2008/10

N2 - Lewis number represents the thermo-diffusive effects on laminar flames. That of hydrogen-air mixture varies extensively with the equivalence ratio due to the high molecular diffusivity of hydrogen. In this study, the influences of pressure and thermo-diffusive effects on spherically propagating premixed hydrogen-air turbulent flames were studied using a constant volume fan-stirred combustion vessel. It was noted that the ratio of the turbulent to unstretched laminar burning velocity increased with decreasing equivalence ratio and increasing mixture pressure. Turbulent burning velocity was dominated by three factors: (1) purely hydrodynamic factor, turbulence Reynolds number, (2) relative turbulence intensity to reaction speed, the ratio of turbulence intensity to unstretched laminar burning velocity, and (3) sensitivity of the flame to the stretch due to the thermo-diffusive effects, Lewis and Markstein numbers. A turbulent burning velocity correlation in terms of Reynolds and Lewis numbers is presented.

AB - Lewis number represents the thermo-diffusive effects on laminar flames. That of hydrogen-air mixture varies extensively with the equivalence ratio due to the high molecular diffusivity of hydrogen. In this study, the influences of pressure and thermo-diffusive effects on spherically propagating premixed hydrogen-air turbulent flames were studied using a constant volume fan-stirred combustion vessel. It was noted that the ratio of the turbulent to unstretched laminar burning velocity increased with decreasing equivalence ratio and increasing mixture pressure. Turbulent burning velocity was dominated by three factors: (1) purely hydrodynamic factor, turbulence Reynolds number, (2) relative turbulence intensity to reaction speed, the ratio of turbulence intensity to unstretched laminar burning velocity, and (3) sensitivity of the flame to the stretch due to the thermo-diffusive effects, Lewis and Markstein numbers. A turbulent burning velocity correlation in terms of Reynolds and Lewis numbers is presented.

UR - http://www.scopus.com/inward/record.url?scp=53449095962&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=53449095962&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2008.06.013

DO - 10.1016/j.ijhydene.2008.06.013

M3 - Article

AN - SCOPUS:53449095962

VL - 33

SP - 5842

EP - 5849

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 20

ER -