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Numerical Simulation of Soot Formation in Laminar C2H4Opposed-flow Diffusion Flames under Different Pressures(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年04期
Page:
16-21
Research Field:
动力工程及工程热物理
Publishing date:

Info

Title:
Numerical Simulation of Soot Formation in Laminar C2H4Opposed-flow Diffusion Flames under Different Pressures
Author(s):
Wang Shengfu; Xi Jianfei; Gu Zhongzhu; Cai Jie
School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China
Keywords:
high pressure; soot formation; opposed-flow diffusion flame; numerical simulation
PACS:
TK402
DOI:
10.3969/j.issn.1672-1292.2020.04.003
Abstract:
The opposed-flow diffusion flame model in Chemkin is used to simulate the formation of soot in C2H4 diffusion flames,focusing on the formation of soot particles and some gas phase small molecules and precursors under different pressures. The concentration distributions of various intermediates and soot precursors in C2H4 diffusion flames are investigated under pressure range of 1 to 5 atm in increments of 0.1 atm. The results show that with the increase of pressure,the volume fraction and number density of soot increase rapidly,the content of H2,CH4 and other small molecules decreases,and the formation area of small molecules in the flame surface and gas phase becomes smaller. The rapid increase of PAHs and C2H2 content is realized by HACA mechanism,which accelerates the nucleation and growth rate of soot,and promotes the rapid increase of soot number density and volume fraction.

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Last Update: 2020-12-15