الفهرس 
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Abstract
Temperature, velocity and species concentration profiles lrough low pressure, flat, premixed methane-air flames were ~asured in low pressure burner. Care was taken to obtain liabatic flames.
Platinum- 20% rhodium versus platinum- 40% rhodium fine wire hermocouples used to measure gas temperature, and an appropriate as temperature correction for radiation loss was made. Laser oppler a~emometry used to measure gas velocities and infra-red ras analyser used to measure species concentration. Estimates were lade for the accuracy of the measurement.
Laminar burning velocities of a wide range of nixture have been measured at various sub-atmospheric Values of burning velocity are compared with those workers.
methane-air pressures. of other
The present study included investigations of the effects of addition of graphite on the methane-air flame for different graphite concentrations as additives, as a simulation for coal combustion. The proportions of graphite and methane were varied to represent different proportions of char and volatiles. Laminar burning velocities, species concentrations, gas velocities and gas temperatures were measured. The experimental observed changes in burning velocity and maximum flame temperature are explained in terms of change in the heat release rate. Also, the presence of graphite does not change greatly the gas phase composition and the kinetics of methane-air.
Computed results from reaction kinetics and transport data were obtained from the kinetic model of Dixon-Lewis is employed to examine the effects of grahpite loading on burning velocities, gas temperature, heat release rate and flame structure of grahpite/ methane-air flame. Good agreement was found in the comparisons between the experimental and the computed results.