Prediction of hydrodynamic characteristics of combined propellers based on CFD method

Abstract

In recent years, with the concept of "green ship" put forward, it has been a major task for ship workers to improve ship propulsion efficiency and save fuel consumption. Combined propellers show higher propulsion efficiency and better energy saving effect, so they are favored by ship workers. This article using the computational fluid dynamics (CFD) software to the single propeller, tandem propellers and contra-rotating propellers was simulated in different speed coefficient, and forecast the propeller hydrodynamic performance, comparing single propeller, tandem propellers and contra-rotating propellers open water efficiency shows: the contra-rotating propellers and tandem propellers rear blade absorbing front blade axial velocity and trailing vortex energy, increase propeller thrust, to improve the efficiency of the propeller propulsion, energy conservation and emission reduction has important significance, also conforms to the concept of "green design" of the ship.