Computation of flow field around ship hull including self propulsion characteristics at varying rudder positions

Flow field around different modern benchmark ship hull with self propulsion characteristics at varying longitudinal positions of rudder is computed using Computation Fluid Dynamics (CFD) technique. Numerical study is performed around bare hull first to determine free surface wave elevation and resistance components. Zonal approach is applied to incorporate ‘potential flow solver’ in the region outside the boundary layer & wake, ‘boundary layer solver’ in thin boundary layer region near the hull and ‘Navier Stokes solver’ in the wake region successively. Lifting Line method coupled with RANS solver is used to compute propeller open and self propulsion characteristics at different positions of rudder. Verification and validation studies for resistance coefficients have also been carried out using ITTC recommended procedure. The present computational method reveals that CFD results of flow field around ship hull with propeller and rudder effects are prospective and can be successfully applied in maritime industry.