Measurements of laminar burning velocities and onset of cellular instabilities of methane-hydrogen-air flames at elevated pressures and temperatures

被引：138
作者：
Hu, Erjiang [1 ]
Huang, Zuohua [1 ]
He, Jiajia [1 ]
Zheng, Jianjun [1 ]
Miao, Haiyan [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Shaanxi Prov, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Methane; Hydrogen; Laminar burning velocity; Onset of cellular instability; Elevated pressures and temperatures; NATURAL-GAS; MARKSTEIN NUMBERS; EMISSION CHARACTERISTICS; MIXTURES; COMBUSTION; ENGINE; EFFICIENCY; STABILITY; DIFFUSION; LENGTHS;
D O I：
10.1016/j.ijhydene.2009.04.058
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
An experimental study on laminar burning velocities and onset of cellular instabilities of the premixed methane-hydrogen-air flames was conducted in a constant volume combustion vessel at elevated pressures and temperatures. The unstretched laminar burning velocity and Markstein length were obtained over a wide range of hydrogen fractions. Besides, the effects of hydrogen addition, initial pressure and initial temperature on flame instabilities were analyzed. The results show that the unstretched flame propagation speed and the unstretched laminar burning velocity are increased with the increase of initial temperature and hydrogen fraction, and they are decreased with the increase of initial pressure. Early onset of cellular instability is presented and the critical radius and Markstein length are decreased with the increase of initial pressure, indicating the increase of hydrodynamic instability with the increase of initial pressure. Flame instability is insensitive to initial temperature compared to initial pressure. With the increase of hydrogen fraction, significant decrease in critical radius and Markstein length is presented, indicating the increase in both diffusional-thermal and hydrodynamic instabilities as hydrogen fraction is increased. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：5574 / 5584
页数：11
相关论文
共 49 条
[1]   Wrinkling of spherically expanding flames [J].
Addabbo, R ;
Bechtold, JK ;
Matalon, M .
PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2002, 29 :1527-1535
[2]   Flame stretch interactions of laminar premixed hydrogen/air flames at normal temperature and pressure [J].
Aung, KT ;
Hassan, MI ;
Faeth, GM .
COMBUSTION AND FLAME, 1997, 109 (1-2) :1-24
[3]   HYDRODYNAMIC AND DIFFUSION EFFECTS ON THE STABILITY OF SPHERICALLY EXPANDING FLAMES [J].
BECHTOLD, JK ;
MATALON, M .
COMBUSTION AND FLAME, 1987, 67 (01) :77-90
[4]   The laminar burning velocity of flames propagating in mixtures of hydrocarbons and air measured with the heat flux method [J].
Bosschaart, KJ ;
de Goey, LPH .
COMBUSTION AND FLAME, 2004, 136 (03) :261-269
[5]   Detailed analysis of the heat flux method for measuring burning velocities [J].
Bosschaart, KJ ;
de Goey, LPH .
COMBUSTION AND FLAME, 2003, 132 (1-2) :170-180
[6]   Laminar burning velocities of lean hydrogen-air mixtures at pressures up to 1.0 MPa [J].
Bradley, D. ;
Lawes, M. ;
Liu, Kexin ;
Verhelst, S. ;
Woolley, R. .
COMBUSTION AND FLAME, 2007, 149 (1-2) :162-172
[7]   THE DEVELOPMENT OF INSTABILITIES IN LAMINAR EXPLOSION FLAMES [J].
BRADLEY, D ;
HARPER, CM .
COMBUSTION AND FLAME, 1994, 99 (3-4) :562-572
[8]   Burning velocities, Markstein lengths, and flame quenching for spherical methane-air flames: A computational study [J].
Bradley, D ;
Gaskell, PH ;
Gu, XJ .
COMBUSTION AND FLAME, 1996, 104 (1-2) :176-198
[9]   The measurement of laminar burning velocities and Markstein numbers for iso-octane-air and iso-octane-n-heptane-air mixtures at elevated temperatures and pressures in an explosion bomb [J].
Bradley, D ;
Hicks, RA ;
Lawes, M ;
Sheppard, CGW ;
Woolley, R .
COMBUSTION AND FLAME, 1998, 115 (1-2) :126-144
[10]  
Dowdy D.R., 1990, Twenty-Third Symposium on Combustion, P325
12345