Turbulent Burning Velocities of Stoichiometric Hydrogen-Carbon Monoxide-Air Flames at Elevated Pressures

Ekenechukwu C. Okafor, Yosuke Fukuda, Yukihide Nagano, Toshiaki Kitagawa

研究成果: ジャーナルへの寄稿Conference article

1 引用 (Scopus)

抄録

Syngas, is an alternative fuel consisting mainly of hydrogen and carbon monoxide in various proportions. An understanding of the effects of the varying constituents on the combustion characteristics is important for improvement of the thermal efficiency of syngas-fueled engines. The effects of hydrogen concentration and mixture pressure on the turbulent burning velocity of outwardly propagating stoichiometric flames of hydrogen-carbon monoxide-air were studied in a constant volume fan-stirred combustion chamber at a constant mixture temperature of 350 K. The mole fraction of hydrogen in the binary fuel was varied from 0 to 1.0, at mixture pressures of 0.10, 0.25 and 0.50 MPa. The turbulence intensity was kept constant at 3.27 m/s. For fixed mixture pressures, it was found that the turbulent burning velocity increased with an increase in hydrogen fraction primarily due to increase in the unstretched laminar burning velocity. The ratio of the turbulence intensity to the unstretched laminar burning velocity decreased with an increase in hydrogen fraction. This led to a decrease in the ratio of the turbulent burning velocity to the unstretched laminar burning velocity. For fixed hydrogen fractions, the turbulent burning velocity and the ratio of turbulent burning velocity to the unstretched laminar burning velocity increased with an increase in mixture pressure even though the unstretched laminar burning velocity decreased. This observation was due to an increase in the ratio of the turbulence intensity to the unstretched laminar burning velocity, a decrease in the Markstein number, and an increase in the turbulence Reynolds number.

元の言語英語
ジャーナルSAE Technical Papers
2014-October
DOI
出版物ステータス出版済み - 10 13 2014
イベントSAE 2014 International Powertrains, Fuels and Lubricants Meeting, FFL 2014 - Birmingham, 英国
継続期間: 10 20 201410 22 2014

Fingerprint

Carbon monoxide
Hydrogen
Air
Turbulence
Alternative fuels
Combustion chambers
Fans
Reynolds number
Engines

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

これを引用

Turbulent Burning Velocities of Stoichiometric Hydrogen-Carbon Monoxide-Air Flames at Elevated Pressures. / Okafor, Ekenechukwu C.; Fukuda, Yosuke; Nagano, Yukihide; Kitagawa, Toshiaki.

:: SAE Technical Papers, 巻 2014-October, 13.10.2014.

研究成果: ジャーナルへの寄稿Conference article

@article{1c2813f69ab74f8799004500c2bd9797,
title = "Turbulent Burning Velocities of Stoichiometric Hydrogen-Carbon Monoxide-Air Flames at Elevated Pressures",
abstract = "Syngas, is an alternative fuel consisting mainly of hydrogen and carbon monoxide in various proportions. An understanding of the effects of the varying constituents on the combustion characteristics is important for improvement of the thermal efficiency of syngas-fueled engines. The effects of hydrogen concentration and mixture pressure on the turbulent burning velocity of outwardly propagating stoichiometric flames of hydrogen-carbon monoxide-air were studied in a constant volume fan-stirred combustion chamber at a constant mixture temperature of 350 K. The mole fraction of hydrogen in the binary fuel was varied from 0 to 1.0, at mixture pressures of 0.10, 0.25 and 0.50 MPa. The turbulence intensity was kept constant at 3.27 m/s. For fixed mixture pressures, it was found that the turbulent burning velocity increased with an increase in hydrogen fraction primarily due to increase in the unstretched laminar burning velocity. The ratio of the turbulence intensity to the unstretched laminar burning velocity decreased with an increase in hydrogen fraction. This led to a decrease in the ratio of the turbulent burning velocity to the unstretched laminar burning velocity. For fixed hydrogen fractions, the turbulent burning velocity and the ratio of turbulent burning velocity to the unstretched laminar burning velocity increased with an increase in mixture pressure even though the unstretched laminar burning velocity decreased. This observation was due to an increase in the ratio of the turbulence intensity to the unstretched laminar burning velocity, a decrease in the Markstein number, and an increase in the turbulence Reynolds number.",
author = "Okafor, {Ekenechukwu C.} and Yosuke Fukuda and Yukihide Nagano and Toshiaki Kitagawa",
year = "2014",
month = "10",
day = "13",
doi = "10.4271/2014-01-2701",
language = "English",
volume = "2014-October",
journal = "SAE Technical Papers",
issn = "0148-7191",
publisher = "SAE International",

}

TY - JOUR

T1 - Turbulent Burning Velocities of Stoichiometric Hydrogen-Carbon Monoxide-Air Flames at Elevated Pressures

AU - Okafor, Ekenechukwu C.

AU - Fukuda, Yosuke

AU - Nagano, Yukihide

AU - Kitagawa, Toshiaki

PY - 2014/10/13

Y1 - 2014/10/13

N2 - Syngas, is an alternative fuel consisting mainly of hydrogen and carbon monoxide in various proportions. An understanding of the effects of the varying constituents on the combustion characteristics is important for improvement of the thermal efficiency of syngas-fueled engines. The effects of hydrogen concentration and mixture pressure on the turbulent burning velocity of outwardly propagating stoichiometric flames of hydrogen-carbon monoxide-air were studied in a constant volume fan-stirred combustion chamber at a constant mixture temperature of 350 K. The mole fraction of hydrogen in the binary fuel was varied from 0 to 1.0, at mixture pressures of 0.10, 0.25 and 0.50 MPa. The turbulence intensity was kept constant at 3.27 m/s. For fixed mixture pressures, it was found that the turbulent burning velocity increased with an increase in hydrogen fraction primarily due to increase in the unstretched laminar burning velocity. The ratio of the turbulence intensity to the unstretched laminar burning velocity decreased with an increase in hydrogen fraction. This led to a decrease in the ratio of the turbulent burning velocity to the unstretched laminar burning velocity. For fixed hydrogen fractions, the turbulent burning velocity and the ratio of turbulent burning velocity to the unstretched laminar burning velocity increased with an increase in mixture pressure even though the unstretched laminar burning velocity decreased. This observation was due to an increase in the ratio of the turbulence intensity to the unstretched laminar burning velocity, a decrease in the Markstein number, and an increase in the turbulence Reynolds number.

AB - Syngas, is an alternative fuel consisting mainly of hydrogen and carbon monoxide in various proportions. An understanding of the effects of the varying constituents on the combustion characteristics is important for improvement of the thermal efficiency of syngas-fueled engines. The effects of hydrogen concentration and mixture pressure on the turbulent burning velocity of outwardly propagating stoichiometric flames of hydrogen-carbon monoxide-air were studied in a constant volume fan-stirred combustion chamber at a constant mixture temperature of 350 K. The mole fraction of hydrogen in the binary fuel was varied from 0 to 1.0, at mixture pressures of 0.10, 0.25 and 0.50 MPa. The turbulence intensity was kept constant at 3.27 m/s. For fixed mixture pressures, it was found that the turbulent burning velocity increased with an increase in hydrogen fraction primarily due to increase in the unstretched laminar burning velocity. The ratio of the turbulence intensity to the unstretched laminar burning velocity decreased with an increase in hydrogen fraction. This led to a decrease in the ratio of the turbulent burning velocity to the unstretched laminar burning velocity. For fixed hydrogen fractions, the turbulent burning velocity and the ratio of turbulent burning velocity to the unstretched laminar burning velocity increased with an increase in mixture pressure even though the unstretched laminar burning velocity decreased. This observation was due to an increase in the ratio of the turbulence intensity to the unstretched laminar burning velocity, a decrease in the Markstein number, and an increase in the turbulence Reynolds number.

UR - http://www.scopus.com/inward/record.url?scp=84938539752&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84938539752&partnerID=8YFLogxK

U2 - 10.4271/2014-01-2701

DO - 10.4271/2014-01-2701

M3 - Conference article

AN - SCOPUS:84938539752

VL - 2014-October

JO - SAE Technical Papers

JF - SAE Technical Papers

SN - 0148-7191

ER -