temperature and study how this depends upon the combustion conditions. Inert gas may be added to the flame to increase the parameter range. Decide how to make measurements of fluctuating temperatures and how to reduce this data to useful parameters characterizing the temperature and its fluctuation.

A diffusion flame may be produced by turning off the oxidizer to the pre-mixed flame. Study this mode of combustion. Vary the methane flow rate and observe its effect on the flame structure. Design measurements to locate the flame front under these combustion conditions. Study the effect of diluent gas (nitrogen) on the flame structure, flame temperature and flame luminosity.