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微重力下层流扩散火焰碳烟生成过程

远洪亮 孔文俊

远洪亮, 孔文俊. 微重力下层流扩散火焰碳烟生成过程[J]. 空间科学学报, 2018, 38(4): 517-523. doi: 10.11728/cjss2018.04.517
引用本文: 远洪亮, 孔文俊. 微重力下层流扩散火焰碳烟生成过程[J]. 空间科学学报, 2018, 38(4): 517-523. doi: 10.11728/cjss2018.04.517
YUAN Hongliang, KONG Wenjun. Soot Formation in Laminar Diffusion Flame under Microgravityormalsize[J]. Chinese Journal of Space Science, 2018, 38(4): 517-523. doi: 10.11728/cjss2018.04.517
Citation: YUAN Hongliang, KONG Wenjun. Soot Formation in Laminar Diffusion Flame under Microgravityormalsize[J]. Chinese Journal of Space Science, 2018, 38(4): 517-523. doi: 10.11728/cjss2018.04.517

微重力下层流扩散火焰碳烟生成过程

doi: 10.11728/cjss2018.04.517
基金项目: 

国家自然科学基金项目(U1738113)和国家重点基础研究发展计划项目(2014CB239603)共同资助

详细信息
    作者简介:

    孔文俊,E-mail:wjkong@iet.cn

  • 中图分类号: P527

Soot Formation in Laminar Diffusion Flame under Microgravityormalsize

  • 摘要: 根据详细的燃料氧化机理和多环芳烃生成机理,对乙烯同轴射流火焰在重力变化下碳烟生成情况进行计算.认为碳烟的初始成核是由两个较大的多环芳烃(PAH)二聚而成,碳烟的表面生长机理为HACA,凝结过程主要考虑PAH与碳烟的碰撞吸附,碳烟生长和氧化过程耦合在分节气溶胶模型中.计算结果表明,微重力条件下乙烯同轴射流火焰峰值温度下降230K,碳烟浓度显著增加,且浓度峰值在微重力条件下更加偏离中心线.分析重力变化对碳烟前驱体乙炔和多环芳烃的分布、初始成核速率、表面生长速率及凝结速率的影响.结果表明碳烟在中心轴线上主要是通过凝结过程生成的,且微重力条件下PAH在碳烟表面的凝结更加重要.由于微重力条件下停留时间更长,导致碳烟直径更大.

     

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出版历程
  • 收稿日期:  2017-08-22
  • 修回日期:  2018-05-17
  • 刊出日期:  2018-07-15

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