中国物理B ›› 2018, Vol. 27 ›› Issue (9): 94701-094701.doi: 10.1088/1674-1056/27/9/094701

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Physical and chemical effects of phosphorus-containing compounds on laminar premixed flame

Yongfeng Yin(殷永丰), Yong Jiang(蒋勇), Rong Qiu(邱榕), Caiyi Xiong(熊才溢)   

  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2018-03-21 修回日期:2018-05-17 出版日期:2018-09-05 发布日期:2018-09-05
  • 通讯作者: Yong Jiang E-mail:yjjiang@ustc.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No.51576183) and the Fundamental Research Funds for the Central Universities, China (Grant Nos.WK2320000035 and WK2320000041).

Physical and chemical effects of phosphorus-containing compounds on laminar premixed flame

Yongfeng Yin(殷永丰), Yong Jiang(蒋勇), Rong Qiu(邱榕), Caiyi Xiong(熊才溢)   

  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
  • Received:2018-03-21 Revised:2018-05-17 Online:2018-09-05 Published:2018-09-05
  • Contact: Yong Jiang E-mail:yjjiang@ustc.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No.51576183) and the Fundamental Research Funds for the Central Universities, China (Grant Nos.WK2320000035 and WK2320000041).

摘要:

Phosphorus-containing compounds are the promising halon alternatives for flame inhibitions.However,some literatures suggested that the phosphorus-related inhibitors may behave as the unfavorable ones that will increase the burning velocity under lean-burn conditions,and this indeed posed potential threats to the fire prevention and fighting.To seek deeper insights into the reaction process,a numerical investigation was actualized to study the phosphorus-related effects on methane-air flames.By replacing a phosphorus-related inhibitor with the corresponding decomposed molecules,the detailed promoting and inhibiting effects of combustion were separated from the general chemical effect.A comparative study was carried out to identify the interaction between the two effects under different combustion conditions.It is observed that the promoting effect becomes the dominant factor during the reaction process when the equivalence ratio is smaller than 0.60.In this lean-burn condition,the exothermic reactions were faster than the others within the reaction chains due to the reduction of radical recombination in hydrocarbon oxidation.The results are believed to be useful for the further application and improvement of flame inhibitors.

关键词: phosphorus-containing compounds, flame inhibition, chemical effect, burning velocity

Abstract:

Phosphorus-containing compounds are the promising halon alternatives for flame inhibitions.However,some literatures suggested that the phosphorus-related inhibitors may behave as the unfavorable ones that will increase the burning velocity under lean-burn conditions,and this indeed posed potential threats to the fire prevention and fighting.To seek deeper insights into the reaction process,a numerical investigation was actualized to study the phosphorus-related effects on methane-air flames.By replacing a phosphorus-related inhibitor with the corresponding decomposed molecules,the detailed promoting and inhibiting effects of combustion were separated from the general chemical effect.A comparative study was carried out to identify the interaction between the two effects under different combustion conditions.It is observed that the promoting effect becomes the dominant factor during the reaction process when the equivalence ratio is smaller than 0.60.In this lean-burn condition,the exothermic reactions were faster than the others within the reaction chains due to the reduction of radical recombination in hydrocarbon oxidation.The results are believed to be useful for the further application and improvement of flame inhibitors.

Key words: phosphorus-containing compounds, flame inhibition, chemical effect, burning velocity

中图分类号:  (Computational methods in fluid dynamics)

  • 47.11.-j
47.15.-x (Laminar flows) 05.70.-a (Thermodynamics)