STABILIZATION OF LIFTED LAMINAR CO-FLOW FLAMES BY OXYGEN-ENRICHED AIR

被引：12

作者：

Gillon, Pascale ^{[1
]}

Chahine, May ^{[1
]}

Sarh, Brahim ^{[1
,2
]}

Blanchard, Jean-Noel ^{[1
,2
]}

Gilard, Virginie ^{[1
,2
]}

机构：

[1] ICARE CNRS, F-45071 Orleans 2, France

[2] Univ Orleans, IUT, Orleans, France

来源：

COMBUSTION SCIENCE AND TECHNOLOGY | 2012年 / 184卷 / 04期

关键词：

Flame propagation speed; Laminar diffusion flame; Lifted flame; Oxygen-enriched air; TRIBRACHIAL FLAMES; NONPREMIXED JET; DIFFUSION FLAME; TRIPLE FLAMES; PROPAGATION; INSTABILITY; COMBUSTION; GAS;

D O I：

10.1080/00102202.2011.651230

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effects of a co-flow of oxygen-enriched air on the characteristics of a laminar jet diffusion flame of methane are experimentally investigated using a coaxial burner positioned vertically. The volume content of oxygen varies from 21% (air) to 30%. Flame structure is observed through the heights of flame lift-off and flame length based on initial rates of CH4, air, and oxygen percentages. Stability diagrams showing the states of the flame and transitions between these states are drawn. The reduction of the lift-off height observed during the addition of oxygen is explained by the increase of the laminar flame speed and heat release due to a higher flame temperature.

引用

页码：556 / 571

页数：16

共 18 条

[1] Stabilization, propagation and instability of tribrachial triple flames [J].

Chung, S. H. .

PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2007, 31 :877-892

[2] ON THE CHARACTERISTICS OF LAMINAR LIFTED FLAMES IN A NONPREMIXED JET [J].

CHUNG, SH ;

LEE, BJ .

COMBUSTION AND FLAME, 1991, 86 (1-2) :62-72

[3] FLAME PROPAGATION IN A NONUNIFORM MIXTURE - ANALYSIS OF A SLOWLY VARYING TRIPLE FLAME [J].

DOLD, JW .

COMBUSTION AND FLAME, 1989, 76 (01) :71-88

[4] THE EFFECT OF FLAME STRUCTURE ON SOOT-PARTICLE INCEPTION IN-DIFFUSION FLAMES [J].

DU, J ;

AXELBAUM, RL .

COMBUSTION AND FLAME, 1995, 100 (03) :367-375

[5] Theoretical and numerical study of a symmetrical triple flame using the parabolic flame path approximation [J].

Ghosal, S ;

Vervisch, L .

JOURNAL OF FLUID MECHANICS, 2000, 415 :227-260

[6] Influence of a horizontal magnetic field on a co-flow methane/air diffusion flame [J].

Gilard, Virginie ;

Gillon, Pascale ;

Blanchard, Jean-Noel ;

Sarh, Brahim .

COMBUSTION SCIENCE AND TECHNOLOGY, 2008, 180 (10-11) :1920-1935

[7] Methane/Air-Lifted Flames in Magnetic Gradients [J].

Gillon, P. ;

Blanchard, J. N. ;

Gilard, V. .

COMBUSTION SCIENCE AND TECHNOLOGY, 2010, 182 (11-12) :1805-1819

[8] Experiments on dynamical motion of buoyancy-induced flame instability under different oxygen concentration in ambient gas [J].

Gotoda, Hiroshi ;

Kawaguchi, Shintaro ;

Saso, Yuko .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2008, 32 (08) :1759-1765

[9] Study on the improvement of chemical reaction mechanism of methane based on the Laminar burning velocities in OEC [J].

Han, Ji-Woong ;

Lee, Chang-Eon ;

Kum, Sung-Min ;

Hwang, Yong-Soo .

ENERGY & FUELS, 2007, 21 (06) :3202-3207

[10] Characteristics of laminar lifted flames in coflow jets with initial temperature variation [J].

Kim, K. N. ;

Won, S. H. ;

Chung, S. H. .

PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2007, 31 :947-954

← 1 2 →