Title:
SHIP HULL FRICTIONAL RESISTANCE REDUCING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/191096
Kind Code:
A1
Abstract:
This ship hull frictional resistance reducing apparatus: is equipped with an automatic air distribution device 20 which blows off air from a plurality of air blowoff ports to the bottom of a ship by switching between the plurality of air blowoff ports, and automatically distributes the air; and has n-number of the air blowoff ports, each having a prescribed width, disposed at portions obtained by, depending on the breadth of the bottom of the ship, dividing the breadth of the ship hull into n-number of sections. The automatic air distribution device 20 blows off air from all of the plurality of air blowoff ports in one cycle of air blowoff cycle while switching between the plurality of air blowoff ports in a prescribed sequence. With this configuration, cyclical blowoff is utilized, and it is possible to increase a frictional resistance reducing effect due to air lubrication, while suppressing the motive power required for air blowoff.
Inventors:
KAWAKITA CHIHARU (JP)
ARAKAWA DAIJIRO (JP)
OKADA YOSHIHISA (JP)
NAKAYAMA RYUICHIRO (JP)
FUJII KEITA (JP)
HARADA YASUNORI (JP)
ARAKAWA DAIJIRO (JP)
OKADA YOSHIHISA (JP)
NAKAYAMA RYUICHIRO (JP)
FUJII KEITA (JP)
HARADA YASUNORI (JP)
Application Number:
PCT/JP2023/013705
Publication Date:
October 05, 2023
Filing Date:
March 31, 2023
Export Citation:
Assignee:
NATIONAL INSTITUTE OF MARITIME PORT AND AVIATION TECH (JP)
NAKASHIMA PROPELLER CO LTD (JP)
NAKASHIMA PROPELLER CO LTD (JP)
International Classes:
B63B1/38
Foreign References:
| JP2017178180A | 2017-10-05 | |||
| JP2011163774A | 2011-08-25 | |||
| JP4959668B2 | 2012-06-27 | |||
| JP5022345B2 | 2012-09-12 | |||
| JP2008114710A | 2008-05-22 | |||
| JPH10318215A | 1998-12-02 | |||
| JPH09328095A | 1997-12-22 |
Attorney, Agent or Firm:
ABE Shinichi et al. (JP)
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