Numerical Calculation of Hydrodynamic Interference Coefficients between Hull,Rudder and Propeller

摘要

CFD developed rapidly in capability and practicality during past years.A lot of research works on numerical simulation of viscous flow field around ship were widely carried out in past decades.But the research of interference effect among the hull,rudder and propeller was rarely concerned.In this paper,based on an unsteady Reynolds Averaged Navier-Stokes method,the dynamic mesh methods(6DOF) are adopted to simulate straight line and oblique towing test of ship with twin propellers and twin rudders.And based on the simulation results,the interference coefficients,such as effective weak coefficient ωp,rudder's effective longitudinal velocity uR,effective attack angle aR,rudder force's modificatory factor aH for shiphandling derivational transverse force and its dimensionless distance to ship's gravity point,are calculated.The computed results of this paper agree well with the experimental results carried out in the tower tank of ITTC.It shows that the methods on numerical calculation of Interference Coefficients between hull,rudder and propeller is successful.