Knuckle line type internal-rotating finny tail ship form

Abstract

The invention discloses a knuckle line type internal-rotating finny tail ship form, and belongs to the technical field of ships. The knuckle line type internal-rotating finny tail ship form comprises a propeller; the knuckle line type internal-rotating finny tail ship form is obtained by arranging a knuckle line on the basis of an internal-rotating finny tail ship form; and the position of the knuckle line is on the axial external side of the propeller in a ship length direction. The knuckle line type internal-rotating finny tail ship form has the advantages that guiding effects on a longitudinal flow and a side flow can be achieved and a rectifying effect can be also 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) Do...

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

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