Device and method for reducing wave-making resistance of warship

Abstract

The invention relates to a device and a method for reducing the wave-making resistance of a warship, which includes a hull, the lower part of the bow of the ship hull is provided with a forward projecting mechanism extending out of the ship hull, and an inner cavity is arranged inside the protruding mechanism, the inner cavity is communicated with an air source arranged in the hull through a gas pipe, A gas flow regulating device is arranged on the trachea, the protruding mechanism is provided with a nozzle communicated with the inner cavity, The invention is used for ejecting bubbles to change the height, phase and frequency of the first wave of the warship, and the aspect ratio of the warship to achieve the purpose of reducing the wave resistance, and the ejected bubbles can reduce the frictional resistance of the surface warship, increase the speed of the surface warship, save the energy consumption and carbon emission in the shipping process, and the gas source is provided with anozone generator. When needed, ozone is injected through the nozzle along with the bubbles to reduce the breeding of aquatic organisms, reduce the daily maintenance workload, reduce fuel consumption ofships, increase ship speed and reduce emissions.

Description

technical field [0001] The invention relates to the field of ship drag reduction, in particular to a device and method for reducing ship wave-making resistance. Background technique [0002] The resistance suffered by surface ships mainly includes pressure difference resistance, wave-making resistance and frictional resistance. When sailing at low speed, frictional resistance accounts for the main part, while at high-speed sailing, wave-making resistance takes up the main part. The wave-making resistance is mainly composed of the bow wave and the stern wave, and its size is related to the height of the bow wave, whether the bow wave and the wake wave cancel each other, and the length-to-width ratio of the ship. When the ship is running, the bow of the ship exerts pressure on the water, splits the water and advances, so a group of waves is aroused at the bow of the ship, which is the head wave. As the stern advances, an area of ​​low pressure is left in the water, which beco...

AI Technical Summary

Problems solved by technology

However, once the current technical ship is built, the length of the ship and the phase, amplitude, and frequency of the bow wave can no longer be actively adjusted, and it is impossible to actively adjust flexibly according to real-time sea conditions and its own speed, reduce the height of the bow wave, change the length-to-width ratio, Make the bow wave and wake wave of the ship cancel each other at the stern, so that the wave-making resistance can be minimized under various sea conditions and speeds

[0004] In addition, the ship sails on the water surface, and various aquatic organisms often breed in the underwater part, which will increase the frictional resistance of the ship, corrode the bottom of the ship, and increase the workload of daily maintenance.

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