Sadegh Kuhzad - Department of Maritime Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
Hashem Nowruzi - Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran

In the current study, the thrust, torque, and hydrodynamics efficiency of a closed-loop propeller (Sharrowpropeller) in the open-water condition is numerically studied using computational fluid dynamics (CFD).The Reynolds-Averaged Navier-Stokes (RANS) with k-epsilon turbulence model (k-𝜀) and the MultipleReference Frame (MRF) approach, are employed in Star CCM software. To this accomplishment, thehydrodynamic behavior of a loop propeller under two different advance coefficients ۰.۸ and ۱.۲, and twovarious rotational speeds ۲۰ and ۷۰ rps compared to the Wageningen B-series propeller are studied. Basedon the CFD results, the Sharrow propeller shows a ۹.۹% improvement in the hydrodynamics efficiencycompared similar Wageningen B-series propeller at a rotational speed of ۷۰ rps and advance ratio equal۱.۲.

Hydrodynamic characteristics, Closed loop propeller, Computational Fluid Dynamic (CFD), Star CCM