Analysis of a spray diffusion flame and its extinction in a shear layer

被引：2

作者：

Greenberg, J. B. ^{[1
]}

Katoshevski, D. ^{[2
,3
]}

机构：

[1] Technion Israel Inst Technol, Fac Aerosp Engn, IL-32000 Haifa, Israel

[2] Ben Gurion Univ Negev, Dept Biotechnol & Environm Engn, IL-84105 Beer Sheva, Israel

[3] Ben Gurion Univ Negev, Unit Management & Safety Engn, IL-84105 Beer Sheva, Israel

来源：

COMBUSTION THEORY AND MODELLING | 2009年 / 13卷 / 02期

关键词：

shear layer; diffusion flame; spray; BURKE-SCHUMANN FLAME; FLOW;

D O I：

10.1080/13647830802372450

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A new semi-analytical solution for a laminar spray diffusion flame in the shear layer between fuel and oxidant streams is developed. The Stokes number is identified as a small spray droplet-related parameter to be used in a perturbation analysis of the liquid phase governing equations. Appropriate specification of an additional parameter ensures that similarity is achieved so that the concentration field of the liquid in the spray can be readily found. The coupled gas-phase equations are treated using the usual inverse of the large Zeldovitch number for the asymptotic analysis. Numerical results demonstrate how the distribution of the liquid phase in the developing shear layer between two unidirectional gas streams flowing over one another with (the possibility of) dissimilar velocities in their respective free-streams influences the flame shape, location, fuel vapour and temperature fields. An extinction analysis enables a parametric mapping of conditions for extinguishment of the spray diffusion flames to be drawn.

引用

页码：215 / 234

页数：20

共 18 条

[1] Diffusion flames [J].

Burke, SP ;

Schumann, TEW .

INDUSTRIAL AND ENGINEERING CHEMISTRY, 1928, 20 (01) :998-1004

[2] A general asymptotic theory of diffusion flames with application to cellular instability [J].

Cheatham, S ;

Matalon, M .

JOURNAL OF FLUID MECHANICS, 2000, 414 :105-144

[3] BURKE-SCHUMANN FLAME WITH STREAMWISE AND PREFERENTIAL DIFFUSION [J].

CHUNG, SH ;

LAW, CK .

COMBUSTION SCIENCE AND TECHNOLOGY, 1984, 37 (1-2) :21-46

[4] LAMINAR DIFFUSION FLAME IN OSEEN FLOW - STOICHIOMETRIC BURKE-SCHUMANN FLAME AND FROZEN FLOW [J].

CLARKE, JF .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1967, 296 (1447) :519-&

[5]

CLARKE JF, 1967, J I MATH APPL, V3, P347

[6] ON THE ORIGINS OF SPRAY SECTIONAL CONSERVATION EQUATIONS [J].

GREENBERG, JB ;

SILVERMAN, I ;

TAMBOUR, Y .

COMBUSTION AND FLAME, 1993, 93 (1-2) :90-96

[7] Curvature effects in Burke-Schumann spray flame extinction [J].

Greenberg, JB ;

Grodek, F .

AIAA JOURNAL, 2003, 41 (08) :1507-1513

[8] THE BURKE-SCHUMANN DIFFUSION FLAME REVISITED - WITH FUEL SPRAY INJECTION [J].

GREENBERG, JB .

COMBUSTION AND FLAME, 1989, 77 (3-4) :229-240

[9]

Im H.G., 1991, P COMBUST INST, V23, P551, DOI [10.1016/S0082-0784(06)80302-4, DOI 10.1016/S0082-0784(06)80302-4]

[10] A THEORETICAL-STUDY OF POLYDISPERSE LIQUID SPRAYS IN A SHEAR-LAYER FLOW [J].

KATOSHEVSKI, D ;

TAMBOUR, Y .

PHYSICS OF FLUIDS A-FLUID DYNAMICS, 1993, 5 (12) :3085-3098

← 1 2 →