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Numerical Simulations of Gas-Phase Interactions of Phosphorus-Containing Compounds with Cup-Burner Flames

Published

Author(s)

Gregory T. Linteris, Fumiaki Takahashi, Viswanath R. Katta, Valeri I. Babushok

Abstract

Computation has been performed for a methane-air co-flow diffusion flame, in the cup-burner configuration, with a phosphorus- containing compound (PCC), dimethyl methylphosphonate (DMMP) or phosphoric acid, added to the oxidizer stream. The time- dependent axisymmetric numerical code, which includes a detailed kinetics model (77 species and 886 reactions), diffusive transport, and a gray-gas radiation model (for CH4, CO, CO2, H2O, and soot), has revealed the interaction of the gas-phase mechanisms of PCCs with the flame structure. The PCCs behave similarly with regard to flame inhibi-tion: both raise the maximum temperature in the trailing flame, lower radical concentra-tions, and lower the heat-release rate at the peak reactivity spot (i.e., reaction kernel) at the flame base where the flame is stabilized. The mechanism of lowered radical concentrations is primarily due to catalytic cycles involving phosphorus species in both regions of the flame. For DMMP, which contains three methyl groups, the flame exhibited higher temperature and combustion enhancement in the trailing flame, with unique two-zone flame structure.
Proceedings Title
10th Asia-Oceania Symposium on Fire Science and Technology (10th AOSFST)
Conference Dates
October 5-7, 2015
Conference Location
Tsukuba

Keywords

Fire retardants, flame inhibition, DMMP, dimethyl methylphosphonate, gas-phase fire retardants, cup-burner.

Citation

Linteris, G. , Takahashi, F. , Katta, V. and Babushok, V. (2015), Numerical Simulations of Gas-Phase Interactions of Phosphorus-Containing Compounds with Cup-Burner Flames, 10th Asia-Oceania Symposium on Fire Science and Technology (10th AOSFST), Tsukuba, -1, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917847 (Accessed June 17, 2024)

Issues

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Created October 5, 2015, Updated February 19, 2017