Numerical investigation of pressure effects on soot formation in laminar coflow ethylene/air diffusion flames

Fuel ◽  
2021 ◽  
Vol 292 ◽  
pp. 120176
Author(s):  
Junjun Guo ◽  
Yihao Tang ◽  
Venkat Raman ◽  
Hong G. Im
Fuel ◽  
2022 ◽  
Vol 309 ◽  
pp. 122244
Author(s):  
Andisheh Khanehzar ◽  
Francisco Cepeda ◽  
Seth B. Dworkin

1986 ◽  
Vol 108 (3) ◽  
pp. 640-648 ◽  
Author(s):  
K. Saito ◽  
F. A. Williams ◽  
A. S. Gordon

Measured temperature and composition profiles are reported for a number of flames. Implications concerning flame structure are deduced, with emphasis on soot formation and on correlations involving conserved scalars.


2020 ◽  
Vol 194 ◽  
pp. 04054
Author(s):  
Bencheng Zhu ◽  
Yuhan Zhu ◽  
Jiajia Wu ◽  
Kun Lu ◽  
Yang Wang ◽  
...  

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.


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