Comparative Analysis of Engine Propeller Matching (EPM) Characteristics Using Empirical Methods and Computational Fluid Dynamics (CFD) for a 5 GT Fishing Vessel

Abstract

The compatibility between engine and propeller characteristics is a critical factor in determining the performance of a ship’s propulsion system, particularly for small-scale fishing vessels. This study aims to analyze engine-propeller matching (EPM) on a 5 GT fishing vessel using an empirical method based on the Wageningen B-Series and to perform hydrodynamic calculations via Computational Fluid Dynamics (CFD) simulation. Ship resistance calculations were performed using the MARIN (DESPPC) method to determine the required thrust at various operating speeds. Propeller characteristics were determined using Wageningen B-Series data (B4-30, AE/AO = 0.30, P/D = 1.0), while engine characteristics were modeled using a constant power approach.The analysis results show that the optimal operating point occurs at 834 rpm with a torque of 389 Nm. Under these conditions, the propeller is capable of generating a thrust of approximately 3950 N, so the propulsion system is deemed capable of meeting the ship’s operational requirements. CFD simulation results yielded a thrust of 3666.17 N. A comparison between the EPM and CFD methods revealed a 7.2% discrepancy based on thrust. This discrepancy is attributed to the EPM method’s reliance on idealized flow conditions, whereas CFD accounts for viscosity effects, turbulence, and flow distribution more realistically under open-water conditions. Overall, the Engine–Propeller Matching method proved to be effective as an initial approach in the analysis of fishing vessel propulsion systems, with an acceptable level of accuracy following comparison using the CFD numerical method.