Two-Phase Flow Analysis in the Recirculation Region of a Gas Turbine Combustion Chamber by Changing Effective Geometrical Parameters

The purpose of this study is to analyze the two-phase flow in the recirculation region of a gas turbine combustion chamber by changing the effective geometrical parameters of its swirler. The natural and forced rotational flows caused by the geometry of the combustion chamber and flow field conditions have significant effects on combustion and air-fuel mixing. In this study, finite volume method and unstructural meshing are used in a commercial computational fluid dynamics software package in order to investigate the effects of rotational flow injection in combustion chamber and to carry out a parametric study. The obtained results show the volume of the recirculation zone in the primary area of the combustion chamber increases as the swirl number rises. This increases the turbulence intensity and improves air-fuel mixing.