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Title:
PUMP JET PROPULSION DEVICE
Document Type and Number:
Japanese Patent JP2016074404
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a pump jet propulsion device for a ship which has an excellent propulsion efficiency by use of a pump having an impeller of a size such that the impeller can be accommodated in a hull.SOLUTION: A propulsion unit 10 is fitted to a hull 20. A boundary layer separation plate 30 is attached to a part at which the propulsion unit 10 is fitted to the hull 20. The boundary layer separation plate 30 separates a boundary layer flow from a bottom of a ship, and discharges water through an opening provided on a broadside. A pump input water flow 33 is introduced to a pump and a discharge water flow 34 of the pump is injected into the propulsion unit having an appropriate Coanda surface, whereby a secondary water flow having a large flow quantity is generated.SELECTED DRAWING: Figure 3

Inventors:
SAKAMOTO TOSHIYUKI
Application Number:
JP2014218691A
Publication Date:
May 12, 2016
Filing Date:
October 08, 2014
Export Citation:
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Assignee:
SAKAMOTO TOSHIYUKI
International Classes:
B63H11/103; B63H11/04
Domestic Patent References:
JPS644600A1989-01-09