A study into the effect of tip clearance on the performance of b-series and kaplan-series ducted propellers

Abstract A study into the effect of tip clearance on ducted propellers was carried out. Two series propellers, namely B-series and Kaplan-series, were used. The gap between propeller varied from 2mm to 5mm. conducted numerically using computational fluid dynamics (CFD) approach. solver is based Reynolds-Averaged Navier-Stokes (RANS) solutions two turbulence modelling, i.e. k-ω SST by Menter explicit algebraic stress model (EASM), applied in order find out optimum results. This paper objective discuss energy efficiency ships investigating variations clearances. Overall results showed that EASM demonstrated better score (particularly term thrust efficiency) than SST. highest thrust, torque achieved at 3mm for both series. Moreover, Kaplan-series indicating use more appropriate.