CMES-PSV ® -CMES-Tech--HVAF®-PSV®-WID®

the flow chart 　　　　　　　　　　　　　　　　　Model test

Introduction

● PSV consists of a wake improving duct combined with several pre-swirl vanes positioned ahead 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 expected power reduction of PSV is in the range of 3% to 8%.

Hydrodynamic Mechanism

● Produce additional thrust by duct.
● Produce pre-swirled inflow to propeller by pre-swirl vanes and reduce rotational loss in resulting propeller slipstream.
● Improve propeller efficiency by equalizing inflow to the propeller and increasing the flow velocity towards the inner radius of the propeller.
● Suppress the flow separation near the stern of the vessel, and recover the pressure on the surface of the stern.

Real Ship Verification

NO.	Vessel Type	DWT	Energy Saving
1	Oil Tanker	320,000DWT	7.0%
2	Bulk Carrier	53,000DWT	5.1%
3	Bulk Carrier	57,000DWT	5.4%
4	Chemical Tanker	33,000DWT	5.0%