Author : Dhafer A. Hamzah

This study used ANSYS FLUENT to model the transport, mixing, and reaction of chemical species. The reaction system was defined by using and modifying a mixture-material entry in the ANSYS FLUENT database. The study used propane C3H8 for simulation of hydrocarbon combustion and comparison the results with another study for methane CH4combustion for find the difference in combustion temperature and effect of change in specific heat as a function of temperature. The study found that the maximum temperature for propane is less than methane for both states in constant and change of specific heat, and the reason for this attribute because of methane has octane number higher than propane and this effects on flame propagation speed and flame temperature also we note the distribution of maximum temperature is mostly near to wall and axis region as shown in the results . This distribution helps to know where will be the maximum temperature for varies applications. Also the NOx production in this study was dominated by the thermal NO mechanism. This mechanism is very sensitive to temperature. Every effort should be made to ensure that the temperature solution is not over predicted, since this will lead to unrealistically high predicted levels of NO. Because of all this the emission of NOx for methane is more than propane as result for high temperature for methane combustion

Keywords: Propane, Methane Combustion etc.

Article published in International Journal of Current Engineering and Technology, Vol.5, No.4 (Aug-2015)