Drag reduction and efficiency enhancement ship

Abstract

The invention relates to a resistance reduction and efficiency improvement ship which comprises a ship body (1) and a propeller (2), the bottom of the ship body (1) is provided with a diversion trench (11), the propeller (2) is located in the diversion trench (11) and mounted in the ship body (1), the rear portion of the ship body (1) is provided with an eddy dissipation device (12), the left side wall, located under water, of the tail of the ship body (1) is provided with a left inclined downstream groove (13), and the right side wall, located under water, of the tail of the ship body (1) is provided with right inclined downstream groove (14).When the ship sails forward, eddy formed at the tail of the ship body is smaller, backward dragging force to the ship body is smaller, the forward sailing speed can be raised, power efficiency can be improved, the speed of the ship which sails backwards can be higher, efficiency is higher, and steering is more flexible and convenient; compared with a warship of the same level, the sailing speed increase, the sailing speed, the steering speed and the backward sailing speed are further increased compared with an ordinary ship and warship under the situation that the output power is consistent, the advantages are more obvious, and the effect is more outstanding.

Description

technical field [0001] The invention relates to ships, in particular to a ship that can reduce traveling resistance and increase efficiency. Background technique [0002] The underwater parts of the tail of existing ships and warships are basically vertical structures, and the propellers of the main engine are all protruding from the rear of the tail of the hull. This structure will cause the ship to sail forward. There will be a steady stream of vortices at the tail. Due to the continuous emergence of this vortex, there will be a continuous backward drag force on the ship, and the faster the propeller of the main engine rotates, the faster the speed of the vortex will be. The greater the force. Just because of the existence of the backward drag force, the sailing speed of the ship must be limited to a certain extent, which affects the power efficiency of the ship. The conventional structure of the stern of existing ships and warships will also form a considerable stern re...

AI Technical Summary

Problems solved by technology

Because of the existence of the backward drag force, it will inevitably limit the sailing speed of the ship to a certain extent and affect the power efficiency of the ship.

The conventional structure of the stern of existing ships and warships will also form a relatively large stern resistance facade when the ship is in reverse, and the area of ​​water flow resistance encountered by the ship in reverse will affect the reverse speed of the ship

In addition, when the main engine propeller is reversed, most of the jet flow will act on the hull elevation at the tail of the hull, offsetting most of the jet flow force, and only part of the jet flow will rush to the surroundings of the hull tail to make the ship reverse. Therefore, the speed of the ship is slow when going backwards, which is far from the effect of the reverse rotation output power of the propeller of the main engine

Existing ordinary ships and warships all have a single rudder structure. Due to the limited stress area of ​​a single rudder itself, the turning radius of the ship will be relatively large when turning, which hinders the efficiency of the ship. All of the above are existing Weaknesses in ship technology

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