Hull-propeller-rudder interaction of the JBC ship model

Abstract

The hull-propeller-rudder interaction of the JBC ship model sailing at the design speed in calm water at the ship point condition is predicted using CFD. Numerical simulations are performed using the viscous flow solver ISIS-CFD of the commercial software Fine™/Marine based on a 3-D fully discretized propeller model using the sliding grid technique to simulate the propeller rotation. The unsteady Reynolds-averaged Navier-Stokes equation is numerically solved and the closure to turbulence is achieved by making use of the k-w SST model. A special focus on the wake flow for the ship with and without rudder is brought into attention, all aimed at studying the hull-propeller and the hull- propeller-rudder interaction, respectively. First, the ship without rudder is simulated and compared to the experimental data from the Tokyo 2015 Workshop on CFD in Ship Hydrodynamics. Second, the hull-propeller-rudder interaction is introduced through a direct comparison with the first case without rudder. The validation process shows a reasonable agreement with the EFD data with a slightly over predicted resistance and thrust forces. This study stand as a primary step for a future planned investigation of the hull-propeller-rudder interaction at different rudder angles.