Non-premixed flame characteristics and exhaust gas concentrations behind rifled bluff-body cones

被引：8

作者：

Yen, Shun-Chang ^{[1
]}

Shih, Chih-Long ^{[1
]}

San, Kuo-Ching ^{[2
]}

机构：

[1] Natl Taiwan Ocean Univ, Dept Mech & Mechatron Engn, Keelung 202, Taiwan

[2] ROC Air Force Acad, Dept Aeronaut & Astronaut, Kaohsiung 820, Taiwan

来源：

JOURNAL OF THE ENERGY INSTITUTE | 2018年 / 91卷 / 04期

关键词：

Rifled bluff-body cone; Non-premixed; Schlieren photography; Flame length; Exhaust gas; STABILIZED FLAMES; THERMAL STRUCTURE; COMBUSTION;

D O I：

10.1016/j.joei.2017.04.008

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Four bluff-body cones with/without rifled v-grooves were installed behind a non-premixed traditional combustion nozzle to intensify the bluff-body effects and swirl flow. The spiral rifles transformed axial momentum (or axial velocity) into tangential momentum (or tangential velocity). The interaction between the fuel tangential component and axial air flow increased turbulence intensity (T.I) The Schlieren photography was utilized to visualize the flame structures and classify three flame patterns jet flame, recirculation flame, and turbulence flame. The jet flame occurs when fuel-jet velocity is high and air-jet velocity (u(a)) is low. However, the turbulence flame exists at the high air-jet velocity. The flame lengths were measured using the direct photography scheme. The flame length at high ua is significantly shorter than that at low ua. Furthermore, the increase of rifle number (i.e., increasing T.I) induces the high maximum temperature and low nitric-oxide concentration. (C) 2017 Energy Institute. Published by Elsevier Ltd. All rights reserved.

引用

页码：489 / 501

页数：13

共 18 条

[1]

[Anonymous], 1971, S INT COMBUST

[2]

Chen R. H., 1988, 22 S INT COMB, V22, P531

[3] A COMPARISON OF BLUFF-BODY AND SWIRL-STABILIZED FLAMES [J].

CHEN, RH ;

DRISCOLL, JF ;

KELLY, J ;

NAMAZIAN, M ;

SCHEFER, RW .

COMBUSTION SCIENCE AND TECHNOLOGY, 1990, 71 (4-6) :197-217

[4]

Chigier N.A., 1964, T AM SOC MECH ENG, P788, DOI DOI 10.1115/1.3655954

[5]

Gortier H., 1954, REV MATEMATICA HISPA, V14, P143

[6]

Gupta A.K., 1984, SWIRL FLOW

[7]

Hsu H. J., 2007, THESIS

[8] CHARACTERISTIC MODES AND THERMAL STRUCTURE OF NONPREMIXED CIRCULAR-DISC STABILIZED FLAMES [J].

HUANG, RF ;

LIN, CL .

COMBUSTION SCIENCE AND TECHNOLOGY, 1994, 100 (1-6) :123-139

[9] Flame and flow characteristics of double concentric jets [J].

Huang, RF ;

Yang, JT ;

Lee, PC .

COMBUSTION AND FLAME, 1997, 108 (1-2) :9-23

[10] Aerodynamic characteristics and thermal structure of nonpremixed reacting swirling wakes at low Reynolds numbers [J].

Huang, Rong F. ;

Yen, Shun C. .

COMBUSTION AND FLAME, 2008, 155 (04) :539-556

← 1 2 →