An Investigation of Soot Volume Fraction and Temperature for Natural Gas Laminar Diffusion Flame Established From a Honeycomb Gaseous Burner

被引:7
作者
Ibrahim, M. M. [1 ]
Attia, A. [1 ]
Emara, A. [1 ,2 ]
Moneib, H. A. [1 ]
机构
[1] Helwan Univ, Dept Mech Power Engn, Fac Engn, Cairo 11718, Egypt
[2] Badr Univ Cairo, Cairo 11718, Egypt
来源
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME | 2020年 / 142卷 / 01期
关键词
gas diluents; honeycomb gaseous burner; laminar diffusion flame; soot volume fraction; ETHYLENE; COEFFICIENT; DILUENTS; OXYGEN;
D O I
10.1115/1.4044123
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
The present work is an experimental investigation that aims at studying the effects of different fuel additives on the soot volume fraction and temperature in a well-defined vertical laminar diffusion flame configuration, and these additives include a diluent (argon) that suppresses the formation of soot and a soot promoter (acetylene) that accelerates and intensifies the soot formation. Three different measuring techniques are employed throughout the whole experimental program, namely, a high-resolution digital camera (up to 3.7 fps) for flame visualization, a bare wire Pt/Pt-13% rhodium fine thermocouple of 15 mu m wire diameter for measuring the mean gas temperature inside the flame region and a laser system for measuring the in-flame soot volume fraction. The results indicated that the soot inception zone (deep dark parabolic shape) occurs at the immediate vicinity of the burner. The soot oxidation zone is characterized by high luminosity, and it begins after the fuel is largely consumed. The increased percentages of acetylene in the fuel mixture would lead to extending the length of this zone to ultimately occupy the whole visible flame length, where the luminosity becomes independent of the amount of soot. The temperature within the soot surface growth zone (orange color) continues increasing but at a lower rate that reflects the domination of diffusion combustion mode. Limited partial oxidation may be anticipated within this zone due to the relatively high temperature, which is not high enough to cause luminosity of the soot particles.
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页数:12
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