Stream Duct Fin, CMES-PSV

Introduction

● PSV consists of a wkae improving duct combined with several pre-swirl vanes position in front of propeller;

● PSV can correct the flow into the propeller which essentially reduces the rotational losses in the propeller slipstream and increase the flow velocity towards the inner radius of the propeller. The geometry shape of HVAF is very simple, and HVAF can be installed behind the propeller easily as original boss cap, which rotates together with the propeller.

● Expected power reduction of PSV is 3% - 8%.

Hydrodynamic Mechanism

● Rectify the strong downstream from propeller blade trailing edge and break up the hub vortex. 
● Produce force 
● Reduce propeller shaft torque by 2%~3% and increase thrust by over 1%~2%

Real Ship Verification