STUDY ON CHARACTERISTIC PARAMETERS OF AN UPSTREAM TUBE-ANNULAR COMBUSTION CHAMBER OF THE MARINE GAS TURBINE ENGINE BY CFD SIMULATION

Abstract

This article presents the numerical study of combustor aerodynamic parameters of marine gas turbine engines to evaluate the actual characteristics. With the 3D model built from the upstream tube-annular combustor of DR76 engine, using CFD approach to evaluate the flow structure, determine the total pressure drop, the airflow distribution into the linner in primary, secondary and dilution zones. As a result, the cold pressure loss in the combustor was 5.5% of the inlet pressure, the air mass flow through the swirl zone by about 29%, the primary orifices and cooling channels by 40.5%, and the dilution zone by 30% of the total combustor airflow.