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Title:
VESSEL
Document Type and Number:
WIPO Patent Application WO/2016/158725
Kind Code:
A1
Abstract:
In the present invention, a connecting location 13 between a duct member 11 and each of struts 12a and 12b is disposed in the vicinity of a bilge vortex occurring at the stern in cases when a duct 10 is not provided. The duct member is formed with an opening angle α of 0-40° where the leading edge-side is further to the outside with respect to the propeller rotary axis Lp than the trailing edge-side. The struts are provided at angles γa and γb with respect to the hull longitudinal direction X so as to induce the increase in a flow component that is opposite in direction to the propeller rotation direction R. Thus, in a vessel 1 in which the duct is disposed at the stern, propulsion can be achieved by the duct member, and the bilge vortex is rectified by the connecting location between the duct member and each of the struts to weaken the flow in the same direction as the propeller rotation direction, and the direction of water flowing into the propeller surface Sp is turned in the direction opposite the rotation direction of a propeller 3 by the struts to improve the propeller efficiency.

Inventors:
YAMAMOTO KOTAKU (JP)
AKIBAYASHI HIDEAKI (JP)
OKA SAORI (JP)
Application Number:
PCT/JP2016/059565
Publication Date:
October 06, 2016
Filing Date:
March 25, 2016
Export Citation:
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Assignee:
MITSUI SHIPBUILDING ENG (JP)
International Classes:
B63H5/16; B63B1/32
Foreign References:
JPS6238800U1987-03-07
JP2011178222A2011-09-15
JPS537096A1978-01-23
JP2623895B21997-06-25
Attorney, Agent or Firm:
SEIRYU Paent Professional Corporation et al. (JP)
Clear stream international patent business corporation (JP)
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