Interference effects on hydrodynamic characteristics of twin-hull ship in calm water and regular waves

In the current study, the hydrodynamic performance of Delft catamaran 372 (DC372) with different interference factors is numerically evaluated under calm and condition in wave. Numerical simulations are conducted using the RANS solver in open-source OpenFOAM software and validated by numerical and experimental data. The effects of the distance between two bodies on the total resistance, sinkage and trim of the ship in calm water at various Froude numbers have been investigated and compared with the demi-hull condition. Moreover, heave and pitch RAOs and the added resistance of the ship are analysed at different interference factors under regular waves. Based on the obtained results, it can be concluded that: In the case of span = 0.5 m and Fr = 0.5, the total resistance has increased by 35.85% compared to twice the demi-hull resistance. The amount of span has the greatest effect on the sinkage at the Froude number of 0.5.