Modelling of Combustion In a Gas Turbine Combustion System

The main aim of this work is to carry out a 3D flow field analysis of an annular gas turbine combustor using finite volume method. The numerical calculations are performed using Semi Implicit Method for Pressure Linked Equations (SIMPLE) algorithm with unstructured grid arrangement. The turbulence models tried are k-ε (RNG) and k-ε (REALIZABLE) model. Two-phase calculations are performed using liquid droplet spray combustion model. The trajectory computation of the fuel provides the source terms for all the gas phase equation. The fuel used is JET-AG, and the combustion chamber is annular. The distribution of velocity field and distribution of temperature field are predicted for the combustor under consideration. From the temperature distribution it is possible to calculate the radial and circumferential pattern factors. It is found that the present prediction procedure is capable of handling complex flow and combustion quite satisfactorily.