Experimental

The water cooled flat flame burner provided for the experiment can be used to study both a pre-mixed or a diffusion flame. The equipment has flow meters that measure the flow rates of the fuel, oxidizer, and any inert gas that is added to the flame. A traversing thermocouple is provided to measure temperature at several locations in the flames. A stationary thermocouple is also provided, and its output may be measured using the GSCAN program and the computer workstation.

You should calculate the flow conditions of fuel and oxidizer that will give rise to stoichiometric combustion. The burning velocity of a stoichiometric pre-mixed
methane/air flame is about 40 cm/sec, and the flame velocity is lower for both rich and lean mixtures. If the total gas flow rate is larger than the flame speed the flame may "blow off" the burner. Design an experiment to study this effect.

Observe and explain the structure of a pre-mixed flame as a function of the flame stoichiometry. Make measurements that will provide information about the flame