Study on Propeller Slipstream

Abstract

Recently, many studies on propeller slipstream have been carried out. It is very important to investigate slipstream of propeller, not only for analysis of propeller performance, but also for design of enegy saving devices around the propeller. In this paper, first, the induced flow fields around conventional propeller (CP) and high skew propeller (HSP) were investigated by experiment. The velocities were measured by 5-hole pitot tube and flow visualization was carried out. Secondly, induced velocities were calculated by use of vortex wake model based on experimental data, In that calculation we made use of circulation distribution of each b1ade which derived from other propeller lifting surface program. The good agreement was obtained between calculated values and measured values.