Numerical Study on the Wake Evolution of Contra-Rotating Propeller in Propeller Open Water and Self-Propulsion Conditions

Abstract

SummaryIn this study, the wake characteristics of a contra-rotating propeller (CRP) were investigated using a numerical simulation. The numerical simulation was carried out with a Reynolds averaged Navier−Stokes equations solver. The numerical simulations were performed on CRPs in both propeller open water and self-propulsion conditions to investigate their wake evolution characteristics. To study the effect of the rudder on the wake in the selfpropulsion condition, the numerical simulations with and without a rudder were compared. The evolution of the CRP wake was analysed through velocity and vorticity contours on one transverse plane between the forward and aft propellers and two transverse planes located downstream of the CRP. The variations of thrust and torque of the forward and aft propellers during one revolution of the CRP were compared to investigate the interaction between forward and aft propellers and the effect of a rudder.

Design, Analysis and Experiments of a High-Speed Water Hovering Amphibious Robot: AmphiSTAR

“…They implemented CFD (computational fluid dynamics) based on RANS (Reynolds averaged Navier Stokes equation) methods to generate simulated results and compared them to experimental data. Palik [29] investigated the performance of a partially submerged propeller and also used RANS with a Bollard condition, i.e., the inflow velocity was zero. They conducted their research on the partially submerged horizontal vertically oriented propellers and reported good consistency between the models and the experiments.…”

The Preliminary Design of a Screw Propeller by Means of Computational Fluid Dynamics

“…The authors showed that thrust and torque of partially submerged propeller decrease significantly with an increase in rate of revolution. In [16], the author has investigated wake characteristics of Contra Rotating Propeller (CRP) in OWT and self-propulsion conditions. In addition, Paik studied the effect of rudder on wake characteristics in self-propulsion test and concluded that the presence of the rudder has no significant influence on wake whereas a significant influence on thrust and torque was noticed.…”