Low-resistance hull under designed waterline

Abstract

The invention relates to a low-resistance hull under a designed waterline, belongs to the field of hull shape design, and mainly relates to the design of hulls under the designed waterline. A propeller is arranged on a ship bow, a shell bossing is designed to be in a spindly shape similar to a cone, the two sides of a transition position between the shell bossing and the hull above the shell bossing are respectively provided with an arc flow guide water groove, the bow waterline above the shell bossing is designed to be in a V shape with the big end up, and the V-shaped bow waterline has a flow guide effect. An area which has a small included angle between the surface normal of the bow and the navigation direction is designed to be close to one fourth to three fourths of ship width, two inclined flow guide water grooves are formed in the two sides of a main engine space located on the lower portion of the ship bow, a symmetric ship bow or an asymmetric ship bow is used, and the stern of the hull is designed to be a streamline reducing body. The bow and the stern are respectively provided with a flow channel which penetrates through the larboard and the starboard, and a spraying propelling unit is arranged in the hull to meet the steering requirement of the hull. Through linear bow and stern design and the propeller arranged on the bow, the head and wake flow fields of the hull are improved, adverse effects of water on ship navigation are weakened, and ship resistance is reduced.

Description

technical field [0001] The invention relates to a low-resistance hull below the design waterline, which belongs to the field of ship shape design. Specifically, the propeller is designed at the bow, and the design of the bow and stern below the design waterline reduces the pressure of the ship during navigation. The type of ship subjected to resistance. Background technique [0002] In order to fully understand the background technology of ship design, on the website of the China Patent Information Center of the State Intellectual Property Office of the People's Republic of China, using "ship" as the search element, a total of 17,876 patents were retrieved, covering items related to or referring to ships. All the patents of , and the relevant introductions of the present invention are as follows. [0003] The application number is 01110399, and the name is the patent of a ship with a propeller in the bow. The propeller is installed on the outside of the bow. The rotation ax...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems existing in the above-mentioned types of ships that are not conducive to reducing the resistance of ships, the effect of installing the propeller on the bow on reducing the resistance of the bow of the ship, the influence of the shape of the bow on the shape resistance, and the influence of the bulbous bow are fully considered. The principle of squeeze flow and wave absorption, and after the propeller is installed in the bow, the flow field at the stern will be less disturbed, the diffusion will be more sufficient, and there will be no propeller at the stern to reduce the negative pressure at the stern, etc.

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