Simulating the mechanically driven compressor of a marine diesel engine by CFD theory

Abstract

This paper presents a flow analysis model through a mechanically driven compressor of the supercharger. The object was a centrifugal compressor directly driven from the engine crankshaft, which was used to increase the intake gas. The initial conditions for the compressor simulation were estimated based on the working relationship between the engine and its compressor, the geometry model was completed by CFturbo software, thereafter the fluid dynamic was simulated in the Ansys Workbench environment, which was based on CFD theory. The simulation results showed the relationships among the intake mass flow through the compressor and technical parameters such as the compressor efficiency and pressure ratio. The results can be applied to improve the efficiency of mechanically driven compressors in practical operation.