Numerical study on flame structure and NO formation in CH4-O2-N2 counterflow diffusion flame diluted with H2O

2004 ◽  
Vol 28 (14) ◽  
pp. 1255-1267 ◽  
Author(s):  
Dong-Jin Hwang ◽  
Jong-Wook Choi ◽  
Jeong Park ◽  
Sang-In Keel ◽  
Chang-Bo Ch ◽  
...  
Keyword(s):  
Diffusion Flame ◽  
Numerical Study ◽  
Flame Structure ◽  
No Formation ◽  
Counterflow Diffusion Flame

scholarly journals Numerical study of the Effect of CO2 on the NH3/CH4 Counterflow Diffusion Flame in O2/CO2/N2 Atmosphere

2021 ◽  
Vol 898 (1) ◽  
pp. 012006
Author(s):  
Conghao Li ◽  
Jingfu Wang ◽  
Ying Chen ◽  
Xiaolei Zhang
Keyword(s):  
Diffusion Flame ◽  
Numerical Study ◽  
Flame Structure ◽  
Flame Temperature ◽  
Combustion Characteristics ◽  
No Emission ◽  
N2 Atmosphere ◽  
Fraction Increase ◽  
Temperature And Pressure ◽  
Counterflow Diffusion Flame

Abstract Ammonia, as a carbon-neutral fuel, draws people attentions recently. NH3/CH4 blends is considered as a kind of fuel. A numerical simulation of the effects of CO2 dilution on the combustion characteristics and NO emission of NH3/CH4 counterflow diffusion flame was conducted in this study. Diffusion flame structure, the influence of CO2 radiation characteristics on temperature and NO emission characteristics were studies at normal temperature and pressure. The dilution and radiation of CO2 reduce the flame temperature significantly. NO concentration decreased with the CO2 mole fraction increase effectively. The study extends the basic combustion characteristics of NH3 containing fuel.

Numerical study on NO formation in CH4-O2-N2 diffusion flame diluted with CO2

2005 ◽  
Vol 29 (2) ◽  
pp. 107-120 ◽  
Author(s):  
Dong-Jin Hwang ◽  
Jeong Park ◽  
Chang-Bo Oh ◽  
Kyung-Hwan Lee ◽  
Sang-In Keel
Keyword(s):  
Diffusion Flame ◽  
Numerical Study ◽  
No Formation

Experimental and numerical study of rich inverse diffusion flame structure

2013 ◽  
Vol 34 (1) ◽  
pp. 1045-1055 ◽  
Author(s):  
B. Stelzner ◽  
F. Hunger ◽  
S. Voss ◽  
J. Keller ◽  
C. Hasse ◽  
...  
Keyword(s):  
Diffusion Flame ◽  
Numerical Study ◽  
Flame Structure ◽  
Inverse Diffusion ◽  
Inverse Diffusion Flame

Numerical Study on Formation Mechanism and Reduction Methods of NOx in Methane/Oxygen-Enriched Air Diffusion Flame

2012 ◽  
Vol 602-604 ◽  
pp. 1317-1324
Author(s):  
Yao Xun Feng ◽  
Xiao Feng Zheng ◽  
Ming Sheng Jia
Keyword(s):  
Production Rate ◽  
Diffusion Flame ◽  
Numerical Study ◽  
Nox Reduction ◽  
Flame Structure ◽  
Inert Gases ◽  
Maximum Temperature ◽  
No Production ◽  
Detailed Chemical Kinetics ◽  
Reduction Methods

In this study, a methane/oxygen-enriched air counterflow diffusion flame was analyzed numerically using detailed chemical kinetics, on the condition that the oxygen mass fraction in the oxidizer stream varied from 21% to 99%. The obtained results show that as the oxygen concentration in air increases, the maximum temperature increases; the region of combustion reaction is gradually divided into two parts, and the total NO production rate and especially the thermal NO production rate increase greatly. With consideration of the possibility of gas recirculation to minimize NOX in the industrial combustor, the usefulness of NOX reduction in combustion was analyzed numerically when the methane stream was diluted with the inert gases N2 or CO2. The obtained results show that the flame structure and dominant mechanism of NO formation change greatly with the concentration of diluents in fuel; the emission index of NO decreases gradually when the concentration of diluent CO2 increases.

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