Effect of buoyancy on soot formation in gas-jet diffusion flame

被引：0
作者：
Byoung-Ho Jeon
Jae Hyuk Choi
机构：
[1] Korea Aerospace Research Institute,Aeropropulsion Department
[2] Korea Maritime University,undefined
来源：
Journal of Mechanical Science and Technology | 2010年 / 24卷
关键词：
Diffusion flame; Soot; High-temperature air combustion technology; Buoyancy; Partial gravity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In order to investigate the effect of buoyancy on soot formation in gas-jet diffusion flame, we conducted one set of experiments with the High-Temperature Air Combustion Technology (HiCOT) system and another set under partial gravity conditions. Ethylene (C2H4) was used as fuel, and soot volume fractions for the flame were observed as shadow graph images with backlight. In the experiment with the HiCOT, the oxygen concentrations were O2 = 15 %, 17 %, and 23 %, with constant flame temperature and surrounding air temperatures of 1100 K, 900 K, and 300 K, respectively. We found that the soot volume fraction in the flames increased with the increase of the oxidizer temperature. In the partial gravity experiment meant to identify the buoyant effect, the results showed that the soot volume fraction depended on the gravity level. These results imply that soot formation in a gas-jet diffusion flame with the HiCOT is strongly affected by the buoyant flow due to oxidizer flow into the soot formation field.
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页码：1537 / 1543
页数：6
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[1]  
Weimer A. W.(1993)Controlling Thermophoresis in the Exothermic Nitridation of an Aluminum Aerosol Aerosol Science and Technology 19 491-848
[2]  
Cochran G. A.(2005)A Study of the Effect of Oxygen Concentration on the Soot Deposition Process in a Diffusion Flame along a Solid Wall by In-Situ Observations in Microgravity JSME (B) Int’l J. 48 839-1491
[3]  
Eisman G. A.(2008)Experiment Study on Thermophoretic Deposition of Soot Particles in Laminar Diffusion Flames along a Solid Wall in Microgravity Experiment thermal and Fluid Science 32 1484-716
[4]  
Henley J. P.(2009)Numerical Simulation on Soot Deposition Process in Laminar Ethylene Diffusion Flames under a Microgravity Condition J. Mechanical Sci. &Tech. 23 707-366
[5]  
Guiton T. A.(2004)Mild Combustion Prog. Energy Combust. Sci. 30 329-1483
[6]  
Knudsen A. K.(2005)Flame Entrainments Induced by a Turbulent Reacting Jet Using High Temperature and Oxygen-Deficient Oxidizers Energy&Fuels 19 1473-2629
[7]  
Nicholas N. R.(2005)On the (MILD) combustion of gaseous, liquid, and solid fuels in high temperature preheated air Proc. Combust. Inst. 30 2623-1363
[8]  
Choi J. H.(1997)Low-NO Energy Convers. Management 38 1353-652
[9]  
Fujita O.(2001) combustion under high preheated air temperature condition in an industrial furnace Energy Convers. Management 42 639-384
[10]  
Tsuiki T.(2005)Advanced low NO Energy 30 373-828
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