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Chin. Phys. B, 2018, Vol. 27(9): 094701    DOI: 10.1088/1674-1056/27/9/094701
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

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)
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
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.

Keywords:  phosphorus-containing compounds      flame inhibition      chemical effect      burning velocity  
Received:  21 March 2018      Revised:  17 May 2018      Accepted manuscript online: 
PACS:  47.11.-j (Computational methods in fluid dynamics)  
  47.15.-x (Laminar flows)  
  05.70.-a (Thermodynamics)  
Fund: 

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).

Corresponding Authors:  Yong Jiang     E-mail:  yjjiang@ustc.edu.cn

Cite this article: 

Yongfeng Yin(殷永丰), Yong Jiang(蒋勇), Rong Qiu(邱榕), Caiyi Xiong(熊才溢) Physical and chemical effects of phosphorus-containing compounds on laminar premixed flame 2018 Chin. Phys. B 27 094701

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