气相温度脉动对碳黑成核与长大及氧化反应的影响-中国电机工程学报.PDFVIP

第31 卷 第14 期 中 国 电 机 工 程 学 报 Vol.31 No.14 May 15, 2011 50 2011 年5 月15 日 Proceedings of the CSEE ©2011 Chin.Soc.for Elec.Eng. 0258-8013 (2011) 14-0050-07 TK 16 A 470 20 文章编号： 中图分类号： 文献标志码： 学科分类号： ⋅ 气相温度脉动对碳黑成核与长大及氧化反应的影响 陈莹，张健 (清华大学工程力学系，北京市 海淀区 100084) Effects of Gas Temperature Fluctuations on the Soot Inception, Growth, and Oxidation Reactions CHEN Ying, ZHANG Jian (Department of Engineering Mechanics, Tsinghua University, Haidian District, Beijing 100084, China) ABSTRACT: The effects of gas temperature fluctuations on 关键词：气相温度脉动；碳黑成核与长大；碳黑氧化；碳黑 the soot inception and surface growth reactions as well as soot 质量分数；碳黑颗粒数密度 oxidation reactions are investigated. The results indicate that the instantaneous variations of soot mass fraction are 0 引言 influenced by the gas temperature fluctuation in both processes 碳黑生成主要源于碳氢燃料的高温热解和不完 of soot inception and surface growth and soot oxidation under 全燃烧。燃烧排放的碳黑作为大气中可吸入颗粒物的 the time-averaged gas temperature of 1 500~1 800 K. The 主要构成成分之一，对人体健康和大气环境有极大危 influences are enhanced by the increase in the fluctuation amplitude of the gas temperature. The gas temperature 害[1-2] 。碳黑的形成与控制近年来引起人们越来越多 fluctuation results in faster rates of soot nucleation and surface 的关注，已开展许多研究[3-8] 。为提高燃烧效率，发 growth reactions in the processes of soot inception and surface 展抑制燃烧过程中碳黑生成技术，需深入了解碳黑生 growth. The time-averaged soot mass fraction increases with 成机制及影响因素，合理准确预测碳黑生成与排放。 the fluctuation amplitude