scholarly journals A numerical study of the influence of transport properties of inert diluents on soot formation in a coflow laminar ethylene/air diffusion flame

2002 ◽  
Vol 29 (2) ◽  
pp. 2359-2365 ◽  
Author(s):  
Hongsheng Guo ◽  
Fengshan Liu ◽  
Gegory J. Smallwood ◽  
Ömerl L. Gülder
Keyword(s):  
Transport Properties ◽  
Diffusion Flame ◽  
Soot Formation ◽  
Numerical Study ◽  
Air Diffusion

Numerical study on the influence of hydrogen addition on soot formation in a laminar ethylene–air diffusion flame

2006 ◽  
Vol 145 (1-2) ◽  
pp. 324-338 ◽  
Author(s):  
Hongsheng Guo ◽  
Fengshan Liu ◽  
Gregory J. Smallwood ◽  
Ömer L. Gülder
Keyword(s):  
Diffusion Flame ◽  
Soot Formation ◽  
Numerical Study ◽  
Hydrogen Addition ◽  
Air Diffusion

scholarly journals Numerical Study of Hydrogen Addition Fuel on Soot Formation in Axisymmetric Laminar Methane/Air Diffusion Flames

2020 ◽  
Vol 194 ◽  
pp. 04054
Author(s):  
Bencheng Zhu ◽  
Yuhan Zhu ◽  
Jiajia Wu ◽  
Kun Lu ◽  
Yang Wang ◽  
...  
Keyword(s):  
Diffusion Flames ◽  
Soot Formation ◽  
Numerical Study ◽  
Flame Temperature ◽  
Surface Growth ◽  
Chemical Effect ◽  
Oh Radicals ◽  
Phase Reaction ◽  
Hydrogen Addition ◽  
Air Diffusion

This article employs the CoFlame Code to investigate the effects of hydrogen addition to fuel on soot formation characteristics in laminar coflow methane/air diffusion flames at atmospheric pressure. Numerical calculations were carried out using a detailed C1-C2 gas phase reaction mechanism and a soot model consisting of two pyrene molecules colliding into a dimer as soot nucleation, hydrogen abstraction acetylene addition (HACA) and pyrene condensation as surface growth, and soot oxidation by O2, O and OH radicals. Calculations were conducted for five levels of hydrogen addition on volume basis. To quantify the chemical effect of hydrogen, additional calculations are performed for addition of inert pseudo-hydrogen (FH2). The addition of H2 or FH2 does not have a strong influence on flame temperature. The results confirm that hydrogen addition can inhibit soot formation in the methane/air diffusion flame by reducing both the nucleation and surface growth steps of soot formation process. The effect of FH2 addition on soot formation suppression is more remarkable than H2, indicating that the chemical effect of hydrogen added to methane prompts soot formation. The dilution effect of hydrogen addition on soot formation suppression is stronger than its chemical effect on soot formation enhancement the present findings are consistent with those of previous numerical studies.

Numerical Study of Opposed-Jet H2/Air Diffusion Flame - Vortex Interactions

2000 ◽  
Vol 158 (1) ◽  
pp. 365-388 ◽  
Author(s):  
JERRY C. LEE ◽  
CHRISTOS E. FROUZAKIS ◽  
KONSTANTINOS BOULOUCHOS
Keyword(s):  
Diffusion Flame ◽  
Numerical Study ◽  
Vortex Interactions ◽  
Air Diffusion ◽  
Opposed Jet
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