Combustion and Flame, Vol.116, No.1-2, 166-176, 1999
Inhibition of nonpremixed flames by phosphorus-containing compounds
Phosphorus-containing compounds (PCCs) are proposed as viable alternatives to current, ozone-destroying, flame-inhibiting agents. An opposed-jet burner apparatus a as used to study the effectiveness of two low-vapor-pressure PCCs, dimethyl methylphosphonate (DMMP) and trimethyl phosphate (TMP): in extinguishing a nonpremixed methane-air flame. The global extinction strain rate was determined as a function of dopant loadings. Tests were also conducted using nitrogen as an inert additive for reference. Results demonstrate that these phosphorus-containing compounds are significant inhibitors of nonpremixed methane-air flames uc hen introduced into the oxidizer stream, 40 times more effective than nitrogen on a molar basis. A novel technique for measuring the extinction strain rate while maintaining a constant dopant level in one gas stream was developed.
Keywords:DIFFUSION FLAMES;ASYMPTOTIC STRUCTURE;CHEMICAL INHIBITION;FIRE SUPPRESSANTS;EXTINCTION;METHANE;CHEMISTRY;AIR;METHYLPHOSPHONATE;RECOMBINATION