[1]王生福,席剑飞,顾中铸,等.不同压力下层流对冲C2H4扩散火焰中碳烟生成的数值模拟研究[J].南京师范大学学报(工程技术版),2020,20(04):016-21.[doi:10.3969/j.issn.1672-1292.2020.04.003]
　Wang Shengfu,Xi Jianfei,Gu Zhongzhu,et al.Numerical Simulation of Soot Formation in Laminar C2H4Opposed-flow Diffusion Flames under Different Pressures[J].Journal of Nanjing Normal University(Engineering and Technology),2020,20(04):016-21.[doi:10.3969/j.issn.1672-1292.2020.04.003]
点击复制

不同压力下层流对冲C2H4扩散火焰中碳烟生成的数值模拟研究
分享到：

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

卷:
20卷
期数:
2020年04期
页码:
016-21
栏目:
动力工程及工程热物理
出版日期:
2020-12-15

文章信息/Info

Title:
Numerical Simulation of Soot Formation in Laminar C2H4Opposed-flow Diffusion Flames under Different Pressures
文章编号:
1672-1292(2020)04-0016-06
作者:
王生福; 席剑飞; 顾中铸; 蔡 杰
南京师范大学能源与机械工程学院,江苏 南京 210023
Author(s):
Wang Shengfu; Xi Jianfei; Gu Zhongzhu; Cai Jie
School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China
关键词:
高压; 碳烟生成; 对冲扩散火焰; 数值模拟
Keywords:
high pressure; soot formation; opposed-flow diffusion flame; numerical simulation
分类号:
TK402
DOI:
10.3969/j.issn.1672-1292.2020.04.003
文献标志码:
A
摘要:
采用Chemkin中的对冲扩散火焰模型对C2H4对冲扩散火焰中碳烟颗粒的生成进行了数值模拟研究,重点关注不同压力下碳烟颗粒及部分气相小分子和前驱物的形成. 以0.1 atm为增量,探讨了1～5 atm内乙烯扩散火焰中多种中间产物和碳烟前驱物的浓度分布. 数值模拟结果表明,随着压力的不断增大,碳烟体积分数和碳烟数密度快速增加,H2、CH4等气相小分子的含量总体呈现下降趋势但变化不大,火焰面及气相小分子的生成区域变小. PAHs和C2H2含量的快速增加是通过HACA机理实现的,使得碳烟成核和生长速率加快,从而促进了碳烟数密度和体积分数的迅速增加.
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.

参考文献/References:

[1] SEONG H J,BOEHMAN A L. Impact of intake oxygen enrichment on oxidative reactivity and properties of diesel soot[J]. Energy and Fuels,2011,25(2):602-616.
[2]BENTO D S,THOMSON K A,GULDER O L. Soot formation and temperature field structure in laminar propane-air diffusion flames at elevated pressures[J]. Combustion and Flame,2006,145(4):765-778.
[3]SATO H,TREE D R,HODGES J T,et al. A study on the effect of temperature on soot formation in a jet stirred combustor[J]. Symposium(international)on Combustion,1991,23(1):1469-1475.
[4]TREE D R,SVENSSON K I. Soot processes in compression ignition engines[J]. Progress in Energy and Combustion Science,2007,33(3):272-309.
[5]KIM C,XU F,FAETH GM. Soot surface growth and oxidation at pressures up to 8.0 atm in laminar nonpremixed and partially premixed flames[J]. Combustion and Flame,2008,152(3):301-316.
[6]王思文,宋崇林,陈男,等. 甲烷/空气扩散火焰中碳烟颗粒的三维形貌演变[J]. 燃烧科学与技术,2016,22(4):364-369.
[7]顾晨,林柏样,邵灿,等. 温度对预混合乙烯火焰碳烟生成的影响[J]. 内燃机学报,2016,34(2):156-162.
[8]梅俊宇,唐权喜,游小清. 乙烯与乙烷层流预混火焰碳烟生成特性实验研究[J]. 中国电机工程学报,2016,36(16):4505-4512.
[9]罗旻烨,应遥瑶,刘冬. 滞止平板对乙烯射流扩散火焰碳烟特性影响[J]. 工程热物理学报,2018,39(12):2804-2808.
[10]APPEL J,BOCKHORN H,FRENKLACH M. Kinetic modeling of soot formation with detailed chemistry and physics:laminar premixed flames of C2 hydrocarbons[J]. Combustion and Flame,2000,121(1):122-136.
[11]WANG H,FRENKLACH M. A detailed kinetic modeling study of aromatics formation in laminar premixed acetylene and ethylene flames[J]. Combustion and Flame,1997,110(1):173-221.
[12]FRENKLACH M,WANG H. Detailed modeling of soot particle nucleation and growth[J]. Symposium(international)on Combustion,1991,23(1):1559-1566.
[13]SCHUETZ C A,FRENKLACH M. Nucleation of soot molecular dynamics simulations of pyrene dimerization[J]. Proceedings of the Combustion Institute,2002,29(2):2307-2314.
[14]HAHN W A,WENDT J O L,TYSON T J. Analysis of the flat laminar opposed jet diffusion flame with finite rate detailed chemical kinetics[J]. Combustion Science and Technology,1981,27:1-17.
[15]袁也,席剑飞,顾中铸,等. H2/CO合成气层流扩散燃烧产物NOx生成机理的数值分析[J]. 热能动力工程,2017,32(12):102-105.

备注/Memo

备注/Memo:
收稿日期:2018-10-14.
基金项目:国家自然科学基金资助项目(51706107、51878356)、江苏省自然科学基金面上项目(BK20181385).
通讯作者:席剑飞,博士,副教授,研究方向:燃烧理论与技术. E-mail:jianfeixi@njnu.edu.cn
更新日期/Last Update: 2020-12-15