Why Do Diffusion Flames Emit Smoke?

被引：125

作者：

Kent, J. H. ^{[1
]}

Wagner, H. Gg. ^{[2
]}

机构：

[1] Univ Sydney, Dept Mech Engn, Sydney, NSW 2006, Australia

[2] Univ Gottingen, Inst Phys Chem, D-3400 Gottingen, Germany

来源：

COMBUSTION SCIENCE AND TECHNOLOGY | 1984年 / 41卷 / 5-6期

关键词：

D O I：

10.1080/00102208408923834

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The causes of smoke emission from free gaseous laminar diffusion flames are investigated. Soot concentration, temperature and velocity profiles were measured around the smoke point for a range of fuels. Smoke was emitted when the temperature in the burnout region dropped below about 1300 K. A smoking flame stopped emitting smoke when the temperature in the burnout region was slightly raised locally by absorption of energy from a CO2 laser beam. The temperature drop in the flame is strongly coupled to soot concentration through radiation losses. Soot formation rates are in turn influenced by heat losses and residence times near the fuel nozzle tip. Thus conditions near the nozzle influence the smoke point. The results are also discussed in context with turbulent diffusion flame smoke emission.

引用

页码：245 / 269

页数：25

共 24 条

[1] SOOT EMISSION, THERMAL-RADIATION, AND LAMINAR INSTABILITY OF ACETYLENE DIFFUSION FLAMES [J].

BECKER, HA ;

LIANG, D .

COMBUSTION AND FLAME, 1983, 52 (03) :247-256

[2] TOTAL EMISSION OF SOOT AND THERMAL-RADIATION BY FREE TURBULENT-DIFFUSION FLAMES [J].

BECKER, HA ;

LIANG, D .

COMBUSTION AND FLAME, 1982, 44 (1-3) :305-318

[3] Diffusion flames [J].

Burke, SP ;

Schumann, TEW .

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

[4]

DALESSIO A, 1975, 15TH S INT COMB PITT, P1427

[5]

DeRis J., 1979, 17 S INT COMB COMB I, P1003

[6]

GAYDON AG, 1979, FLAMES THEIR STRUCTU

[7]

Glassman I., 1981, P COMBUST INST, V18, P1175

[8] SOOT FORMATION [J].

HAYNES, BS ;

WAGNER, HG .

PROGRESS IN ENERGY AND COMBUSTION SCIENCE, 1981, 7 (04) :229-273

[9]

Hottel H.C., 1967, RAD TRANSFER

[10] SOOT MEASUREMENTS IN LAMINAR ETHYLENE DIFFUSION FLAMES [J].

KENT, JH ;

WAGNER, HG .

COMBUSTION AND FLAME, 1982, 47 (01) :53-65

← 1 2 3 →