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Ship with knuckle line and internal rotational fin tail

A technology of chamfered lines and internally rotating fins, applied in the direction of hull, stern post, hull parts, etc., can solve the problems of unsatisfactory speed of the ship, increase of ship resistance, failure to achieve the best improvement of ship resistance and propulsion efficiency, etc. , to achieve the effects of improving ship propulsion efficiency, reducing hull resistance, increasing wake fraction and propeller relative rotation efficiency

Inactive Publication Date: 2012-10-24
CSIC WUHAN SHIP & MARINE ENG EQUIP DESIGN
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AI Technical Summary

Problems solved by technology

If a ship with a small draft ratio is directly applied to the design concept of an ordinary double-skeg ship shape, the longitudinal flow area in the middle section of the bottom will be relatively narrow, so that the improvement of the ship's resistance and propulsion efficiency cannot be optimized.
The ship model test proves that if the ordinary double-stern ship type is directly applied to ships of this size, the propulsion efficiency of the ship will be improved while the ship resistance will even increase sharply, and the increase in ship resistance often exceeds that of propulsion. The degree of improvement in performance, resulting in unsatisfactory speed of the ship

Method used

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  • Ship with knuckle line and internal rotational fin tail

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Embodiment Construction

[0026] refer to figure 1 , a knuckle line type internal spin fin tail ship type, including a propeller. The knuckle line type internal spin fin stern ship shape is to set a knuckle line 1 on the basis of the internal spin fin stern ship shape, and the position of the knuckle line 1 is outside the shaft 2 of the propeller along the ship length direction.

[0027] The ship type of this embodiment adopts the vortex stern cross-section form of the common internal spin fin stern ship type in the area inside the propeller, and adopts the knuckle line cross-section form of the double skeg fin ship type for reference in the area outside the propeller. On the one hand, by setting a knuckle line 1 on the outside of the propeller, the complex two-way curvature cross-section line is transformed into two sections of unidirectional curvature cross-section line with the knuckle line as the boundary, so as to control the longitudinal flow and The guiding effect of the side flow achieves the ...

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Abstract

The invention discloses a ship with a knuckle line and an internal rotational fin tail, and belongs to the technical field of ships. The ship comprises a propeller, and the knuckle line is arranged on the basis of a ship with an internal rotation fin tail and positioned on the outer side of a shaft of the propeller along the length direction of the ship. The ship has the advantages that longitudinal flow and lateral flow can be guided, and a flow regulating effect can be achieved.

Description

technical field [0001] The invention belongs to the technical field of ships, and in particular relates to a knuckle line type internal spin fin stern ship shape. Background technique [0002] There are many types of ship lines, and the stern line types suitable for scull ships are too numerous to enumerate. Generally speaking, they mainly include ordinary shaft support scull ship type, double ball stern ship type, double stern ship type, double skeg fin ship type and double internal rotation fin There are five types of stern boats (that is, vortex tail boats). Their characteristics are reflected as follows: [0003] (1) Ordinary shaft bracket double oar ship type [0004] The line shape is simple, the manufacturing is convenient, the wet surface area is small, and the bare hull resistance is low, but there are disadvantages such as uneven wake, low hull efficiency and propulsion efficiency, and large resistance of attachments such as shaft brackets; [0005] (2) Double b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B3/40
CPCY02T70/14Y02T70/10
Inventor 严俊彭必业范为王小红
Owner CSIC WUHAN SHIP & MARINE ENG EQUIP DESIGN
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