### 抄録

The unstretched laminar burning velocities and Markstein numbers of spherically propagating hydrogen-methane-air flames were studied at a mixture pressure of 0.10 MPa and a mixture temperature of 350 K. The fraction of hydrogen in the binary fuel was varied from 0 to 1.0 at equivalence ratios of 0.8, 1.0 and 1.2. The unstretched laminar burning velocity increased non-linearly with hydrogen fraction for all the equivalence ratios. The Markstein number varied non-monotonically at equivalence ratios of 0.8 and 1.0 and increased monotonically at equivalence ratio of 1.2 with increasing hydrogen fraction. Analytical evaluation of the Markstein number suggested that the trends could be due to the effective Lewis number, which varied non-monotonically with hydrogen fraction at equivalence ratios of 0.8 and 1.0 and increased monotonically at 1.2. The propensity of flame instability varied non-monotonically with hydrogen fraction at equivalence ratios of 0.8 and 1.0.

元の言語 | 英語 |
---|---|

ページ（範囲） | 2409-2417 |

ページ数 | 9 |

ジャーナル | International Journal of Hydrogen Energy |

巻 | 39 |

発行部数 | 5 |

DOI | |

出版物ステータス | 出版済み - 2 4 2014 |

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### 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*,

*39*(5), 2409-2417. https://doi.org/10.1016/j.ijhydene.2013.11.128

**Effects of hydrogen concentration on premixed laminar flames of hydrogen-methane-air.** / Okafor, Ekenechukwu C.; Hayakawa, Akihiro; Nagano, Yukihide; Kitagawa, Toshiaki.

研究成果: ジャーナルへの寄稿 › 記事

*International Journal of Hydrogen Energy*, 巻. 39, 番号 5, pp. 2409-2417. https://doi.org/10.1016/j.ijhydene.2013.11.128

}

TY - JOUR

T1 - Effects of hydrogen concentration on premixed laminar flames of hydrogen-methane-air

AU - Okafor, Ekenechukwu C.

AU - Hayakawa, Akihiro

AU - Nagano, Yukihide

AU - Kitagawa, Toshiaki

PY - 2014/2/4

Y1 - 2014/2/4

N2 - The unstretched laminar burning velocities and Markstein numbers of spherically propagating hydrogen-methane-air flames were studied at a mixture pressure of 0.10 MPa and a mixture temperature of 350 K. The fraction of hydrogen in the binary fuel was varied from 0 to 1.0 at equivalence ratios of 0.8, 1.0 and 1.2. The unstretched laminar burning velocity increased non-linearly with hydrogen fraction for all the equivalence ratios. The Markstein number varied non-monotonically at equivalence ratios of 0.8 and 1.0 and increased monotonically at equivalence ratio of 1.2 with increasing hydrogen fraction. Analytical evaluation of the Markstein number suggested that the trends could be due to the effective Lewis number, which varied non-monotonically with hydrogen fraction at equivalence ratios of 0.8 and 1.0 and increased monotonically at 1.2. The propensity of flame instability varied non-monotonically with hydrogen fraction at equivalence ratios of 0.8 and 1.0.

AB - The unstretched laminar burning velocities and Markstein numbers of spherically propagating hydrogen-methane-air flames were studied at a mixture pressure of 0.10 MPa and a mixture temperature of 350 K. The fraction of hydrogen in the binary fuel was varied from 0 to 1.0 at equivalence ratios of 0.8, 1.0 and 1.2. The unstretched laminar burning velocity increased non-linearly with hydrogen fraction for all the equivalence ratios. The Markstein number varied non-monotonically at equivalence ratios of 0.8 and 1.0 and increased monotonically at equivalence ratio of 1.2 with increasing hydrogen fraction. Analytical evaluation of the Markstein number suggested that the trends could be due to the effective Lewis number, which varied non-monotonically with hydrogen fraction at equivalence ratios of 0.8 and 1.0 and increased monotonically at 1.2. The propensity of flame instability varied non-monotonically with hydrogen fraction at equivalence ratios of 0.8 and 1.0.

UR - http://www.scopus.com/inward/record.url?scp=84892363937&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892363937&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2013.11.128

DO - 10.1016/j.ijhydene.2013.11.128

M3 - Article

AN - SCOPUS:84892363937

VL - 39

SP - 2409

EP - 2417

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 5

ER -