TY - JFULL AU - Moghiman Mohammad and Amiri Maryam and Amiri Amirhosein PY - 2012/8/ TI - Study on the Variation Effects of Diverging Angleon Characteristics of Flow in Converging and Diverging Ducts by Numerical Method T2 - International Journal of Physical and Mathematical Sciences SP - 695 EP - 700 VL - 6 SN - 1307-6892 UR - https://publications.waset.org/pdf/4303 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 67, 2012 N2 - The present paper develops and validates a numerical procedure for the calculation of turbulent combustive flow in converging and diverging ducts and throuh simulation of the heat transfer processes, the amount of production and spread of Nox pollutant has been measured. A marching integration solution procedure employing the TDMA is used to solve the discretized equations. The turbulence model is the Prandtl Mixing Length method. Modeling the combustion process is done by the use of Arrhenius and Eddy Dissipation method. Thermal mechanism has been utilized for modeling the process of forming the nitrogen oxides. Finite difference method and Genmix numerical code are used for numerical solution of equations. Our results indicate the important influence of the limiting diverging angle of diffuser on the coefficient of recovering of pressure. Moreover, due to the intense dependence of Nox pollutant to the maximum temperature in the domain with this feature, the Nox pollutant amount is also in maximum level. ER -