Effects of Equivalence Ratio and Diverging Angle on Formation of NOX in Converging and Diverging Ducts

The present paper developsa numerical procedure(finite difference) for the calculation of turbulent combustive flows and simulation of production of NOXpollutants in converging and diverging ducts. Also this paper reports the results of a numerical investigation of the effects of the equivalence ratio and diverging angle on NOXemissions. Our results indicate the important influence of the limiting diverging angle of diffuser on the coefficient of pressure recovery. Moreover, due to its intense dependence on the maximum temperature in the domain, the NOXpollutant amount attained also maximum level. By increasing the equivalence ratio, maximum temperature and also NOXpollutant increase.