物理化学学报 >> 2009, Vol. 25 >> Issue (03): 477-485.doi: 10.3866/PKU.WHXB20090314

研究论文 上一篇    下一篇

磷化合物的火焰抑制中湍流混合作用数值研究

蒋勇 邱榕   

  1. 中国科学技术大学火灾科学国家重点实验室, 合肥 230026
  • 收稿日期:2008-10-20 修回日期:2008-11-19 发布日期:2009-03-02
  • 通讯作者: 邱榕 E-mail:rqh@ustc.edu.cn

A Numerical Study on Effects of Turbulent Mixing for Flame Inhibition by Phosphorus-Containing Compounds

 JIANG Yong, QIU Rong   

  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2008-10-20 Revised:2008-11-19 Published:2009-03-02
  • Contact: QIU Rong E-mail:rqh@ustc.edu.cn

摘要:

首先构筑了含磷化合物添加剂的甲烷氧化复杂化学动力学机理, 验证了该机理的可靠性, 进而采用随机Monto Carlo 概率密度函数PDF模拟, 详细计算了部分搅拌器中考虑湍流混合作用的磷化合物的火焰抑制行为, 讨论了湍流混合时间与驻留时间比τmix/τres对火焰结构的影响、熄火、以及包含关键火焰自由基重组的催化循环等问题.

关键词: 磷化合物, 火焰抑制, 湍流混合

Abstract:

The complex chemistry of a methane-air flame doped with phosphorus-containing compounds (PCCs) was determined and it was validated with experimental data. Modeling of partially stirred reactors (PaSR) by stochastic Monte Carlo simulations was carried out to investigate flame inhibition by PCCs considering the effects of turbulent mixing. Effects on flame structures were determined by varying the ratio τmix/τres (the residence time τres and the mixing time τmix). Numerical simulations were performed for a wide range of τmix and τres revealing extinction behaviors. A detailed investigation of catalytic cycles involved in the recombination of key flame radicals is discussed.

Key words: Phosphorus-containing compound, Flame inhibition, Turbulent mixing

MSC2000: 

  • O643