ENERGY-SAVING DUCT FOR ATTACHING TO STERN OF SHIP

WIPO Patent Application WO/2016/175340

A1

The present invention provides an energy-saving duct for attaching to the stern of a ship, the circular duct being attached in front of a stern propeller of radius R, wherein the duct has a radius of 0.7R at the back end and an angle of attack of 12 degrees. According to the present invention, by rectifying and accelerating the flow of the flow field entering and passing through the interior of the duct, the pressure recovery of the stern is promoted and thereby the resistance performance of the ship is improved, and moreover, the propulsive performance of the propeller can be improved by the changes in the wake entering the propeller. Furthermore, by suitably configuring the angle of attack of the duct with respect to the inflow flow field, not only can the drag of the duct itself, which is an addition, be minimized, but additional thrust provided by the duct itself can be expected. Also, according to the present invention, as the shape of the duct is comparatively simple and installation can be completed simply by attaching the duct to the stern, production and installation are simple and cost therefor is economical, and the present invention has the benefit of being applicable not only to new hulls but also to existing hulls in operation.

JP4380975	Ship
JPS59126798	[Title of the device] Screw propeller device

KIM KWANG SOO (KR)
KIM YOO CHUL (KR)
KIM YOON SIK (KR)
YIM GEUN TAE (KR)
AHN HAE SEONG (KR)
LEE YOUNG YEON (KR)

PCT/KR2015/004192

November 03, 2016

April 27, 2015

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KOREA INST OCEAN SCI & TECH (KR)

B63H5/16; B63H1/28

KR101453209B1	2014-10-22
KR101453210B1	2014-10-22
JP2002220089A	2002-08-06
KR20130141184A	2013-12-26
KR20120068158A	2012-06-27

DONGCHEON PATENT FIRM (KR)
특허법인 동천 (KR)

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