Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Influence of Hydrocarbon Moiety of DMMP on Flame Propagation in Lean Mixtures

Published

Author(s)

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

Abstract

Phosphorus-containing compounds (PCCs) have been found to be significantly more effective than CF3Br for reducing burning velocity when added to stoichiometric hydrocarbon-air flames. However, when added to lean flames, DMMP (dimethylmethylphosphonate) is predicted to increase the burning velocity. The addition of DMMP to lean mixtures apparently increases the equivalence ratio (fuel/oxidizer) and the combustion temperature, as a result of hydrocarbon content of DMMP molecule. Premixed flames studies with added DMMP, OP(OH)3, and CF3Br are used to understand the different behavior with varying equivalence ratio and agent loading. Decrease of the equivalence ratio leads to the decrease of inhibition effectiveness of PCCs relative to bromine-containing compounds. For very lean mixtures CF3Br becomes more effective inhibitor than PCCs. Calculations of laminar burning velocities for pure DMMP/air mixtures predict the maximum burning velocity of 10.5 cm/s at 4.04% of DMMP in air and at an initial temperature of 400 K. Adiabatic combustion temperature is 2155 K at these conditions.
Citation
Combustion and Flame
Volume
171

Keywords

DMMP, PCCs, CF3Br, flame inhibition, fire suppressants

Citation

Linteris, G. , Babushok, V. , Katta, V. and Takahashi, F. (2016), Influence of Hydrocarbon Moiety of DMMP on Flame Propagation in Lean Mixtures, Combustion and Flame, [online], https://doi.org/10.1016/j.combustflame.2016.06.019 (Accessed March 28, 2024)
Created July 7, 2016, Updated November 10, 2018