The influence of K_4Fe(CN)_6 aerosol on the flame speed of methane-air flame

摘要

The influence of 1% aerosol of the water solution of potassium ferrocyanide K_4[Fe(CN)_6] on the flame speed of stoichoimetric methane- air flame, stabilized over the Mache-Hebra burner, has been studied experimentally and by computer simulation. The flame speed was measured at atmospheric pressure and the temperature 93°C. Addition of the aerosol of the water solution of potassium ferrocyanide results in significantly greater reduction of the flame speed of stoichiometric methane-air flame, compared to aerosol addition without the salt. Modeling the flame speed with the mechanism GRI-Mech 3.0 shows this effect to be caused by the presence of potassium atoms in the composition of this salt. The results obtained account for effectiveness of applying fine aerosol of the water solution of K_4[Fe(CN)_6] in extinguishing fires.