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Vertical fair water fin of single screw ship

A deflector fin, vertical technology, applied in the direction of rotating propellers, rotating propellers, etc., can solve the problems of being unable to enter the international shipping market, scrapping ships, and failing to pass the audit, so as to improve the wake field of ships and reduce excitation force, improve the effect of propulsion efficiency

Inactive Publication Date: 2017-06-13
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two guidelines have come into effect on January 1, 2013, and will be enforced in 2015. Newly designed ships with EEDI index exceeding the standard will not be able to pass the audit of classification societies or IMO, and operating ships with EEDI index exceeding the standard may be forced to be scrapped or unable to enter International shipping market

Method used

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  • Vertical fair water fin of single screw ship
  • Vertical fair water fin of single screw ship
  • Vertical fair water fin of single screw ship

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] to combine Figure 1 to Figure 6 , the diverter fin of the present invention is located in front of the stern propeller, and its upper and lower ends are connected to the hull. to 30°. Under the action of the angle of attack, the cross-section airfoil structure generates a vortex in the flow field in front of the propeller that is opposite to the direction of propeller rotation, reducing the energy loss caused by vortex separation caused by propeller rotation. At the same time, this structure can convert the radial wake of the stern into the axial wake that the propeller can directly absorb, making the axial wake more uniform and reducing the exciting force of the propeller.

[0019] Further, there may be various cross-sectional airfoils of the guide fins, and both symmetrical and asymmetrical airfoil structures along the inn...

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Abstract

The invention provides a vertical fair water fin of a single screw ship. The vertical fair water fin is characterized in that the upper end and the lower end of the fair water fin are connected with a ship body, the fair water fin is located in front of a stern propeller, and an included angle between the inner chord line of the airfoil profile of the fair water fin and the course of the ship is 5-30 degrees. The vertical fair water fin is simple in structural design, low in cost, capable of effectively recycling energy in ship wake flow and reducing the excitation force of the propeller and capable of unifying safety and economy.

Description

technical field [0001] The invention relates to a diversion fin, in particular to a vertical diversion fin for a single-bladed ship, which belongs to the field of ship propulsion energy-saving attachment equipment. Background technique [0002] Along with energy conservation and emission reduction, and the realization of green ship operation requirements, various energy conservation measures have been valued by shipowners. In particular, the EEDI calculation formula was released at the 58th meeting of MEPC and at the 62nd meeting of MEPC in July 2011, the amendment to Annex VI of the MARPOL73 / 78 Convention was formally adopted, and two ship energy efficiency guidelines, EEDI and SEEMP, were determined. The two guidelines have come into effect on January 1, 2013, and will be enforced in 2015. Newly designed ships with EEDI index exceeding the standard will not be able to pass the audit of classification societies or IMO, and operating ships with EEDI index exceeding the stand...

Claims

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Application Information

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IPC IPC(8): B63H1/16
CPCB63H1/16
Inventor 赵庆新郭春雨魏少鹏吴铁成景涛
Owner HARBIN ENG UNIV