Numerical Simulation of Ship Flows with Contrarotating Propellers effects

Abstract

The applicability of the body force model which represents the contrarotating propellers(CRP) effects is examined. At first, the numerical simulation of the propeller open water test is carried out. The velocity distributions obtained by the numerical simulation are compared with those of the measured results and the validation of the model is performed. Then the numerical simulation of ship flows under self-propulsion condition is carried out. The wake flows behind a conventional single propeller(CP) and CRP are compared. The self-propulsion factor, the thrust deduction coefficient in particular, is compared with the measured data and the adaptability of the present model is discussed.