### Abstract

The effect of the equivalence ratio oscillation on a premixed laminar CH4/air flame motion was studied experimentally with equivalence ratio oscillation frequencies of 2 to 15 Hz at lean equivalence ratio using stagnation flow field burner. Novel oscillator does the oscillation conditions and turbulence reduction method is used to suppress the velocity perturbation. The flame position variations at 2, 5, 10 and 15 Hz oscillation frequencies were significantly small when the amplitude of the equivalence ratio oscillation was zero. On the other hand, increase in amplitudes of the equivalence ratio oscillation increased the flame position variation significantly. The flame moved in sinusoidal shape and it can be clearly seen that the flame movement's amplitude was proportional to the amplitudes of the equivalence ratio variations. This result showed that the velocity perturbation is significantly suppressed by turbulence reduction method in the examination range.

Original language | English |
---|---|

Pages (from-to) | 55-60 |

Number of pages | 6 |

Journal | Jurnal Teknologi |

Volume | 76 |

Issue number | 1 |

Publication status | Published - 2015 Sep 1 |

### Fingerprint

### Keywords

- Equivalence ratio oscillation
- Laminar premixed flame
- Turbulence reduction method

### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*Jurnal Teknologi*,

*76*(1), 55-60.

**Stagnation laminar premixed CH<inf>4</inf>/air flame subjected to the equivalence ratio oscillations.** / Abdul Rahman, Mohd Rosdzimin; Tomita, Hishashi; Yokomori, Takeshi; Ueda, Toshihisa.

Research output: Contribution to journal › Article

*Jurnal Teknologi*, vol. 76, no. 1, pp. 55-60.

}

TY - JOUR

T1 - Stagnation laminar premixed CH4/air flame subjected to the equivalence ratio oscillations

AU - Abdul Rahman, Mohd Rosdzimin

AU - Tomita, Hishashi

AU - Yokomori, Takeshi

AU - Ueda, Toshihisa

PY - 2015/9/1

Y1 - 2015/9/1

N2 - The effect of the equivalence ratio oscillation on a premixed laminar CH4/air flame motion was studied experimentally with equivalence ratio oscillation frequencies of 2 to 15 Hz at lean equivalence ratio using stagnation flow field burner. Novel oscillator does the oscillation conditions and turbulence reduction method is used to suppress the velocity perturbation. The flame position variations at 2, 5, 10 and 15 Hz oscillation frequencies were significantly small when the amplitude of the equivalence ratio oscillation was zero. On the other hand, increase in amplitudes of the equivalence ratio oscillation increased the flame position variation significantly. The flame moved in sinusoidal shape and it can be clearly seen that the flame movement's amplitude was proportional to the amplitudes of the equivalence ratio variations. This result showed that the velocity perturbation is significantly suppressed by turbulence reduction method in the examination range.

AB - The effect of the equivalence ratio oscillation on a premixed laminar CH4/air flame motion was studied experimentally with equivalence ratio oscillation frequencies of 2 to 15 Hz at lean equivalence ratio using stagnation flow field burner. Novel oscillator does the oscillation conditions and turbulence reduction method is used to suppress the velocity perturbation. The flame position variations at 2, 5, 10 and 15 Hz oscillation frequencies were significantly small when the amplitude of the equivalence ratio oscillation was zero. On the other hand, increase in amplitudes of the equivalence ratio oscillation increased the flame position variation significantly. The flame moved in sinusoidal shape and it can be clearly seen that the flame movement's amplitude was proportional to the amplitudes of the equivalence ratio variations. This result showed that the velocity perturbation is significantly suppressed by turbulence reduction method in the examination range.

KW - Equivalence ratio oscillation

KW - Laminar premixed flame

KW - Turbulence reduction method

UR - http://www.scopus.com/inward/record.url?scp=84940688846&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84940688846&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84940688846

VL - 76

SP - 55

EP - 60

JO - Jurnal Teknologi (Sciences and Engineering)

JF - Jurnal Teknologi (Sciences and Engineering)

SN - 0127-9696

IS - 1

ER -