Extinction limits of opposed jet turbulent premixed methane air flames with sprays of water and NaCl-water solution

An experimental study on water mist extinction of turbulent premixed flames is described. The aim of the study is to compare the extinction limits of opposed jet turbulent methane/air flames with and without the addition of w ater mist, and to study the influence of several parameters including the s tructure of water mist in terms of droplet size and mass fraction of the co ndensed phase, mean strain rate and equivalence ratio. The effect of NaCl w ater solution on premixed flame extinction is also presented. An air assist ed atomizer is developed to produce and control the water mist. The structu re of the water mist is characterized by a Phase Doppler Anemometer. Water mist interaction with three different configurations of the opposed jet pre mixed flames is explored and the results are discussed by introducing a par ameter representing the water mist efficiency.