High-speed rounded bilge type boat utilizing air cavity to reduce resistance

Abstract

The invention relates to a high-speed rounded bilge type boat utilizing an air cavity to reduce resistance. The high-speed bilge type boat of the invention comprises a boat body, a propulsion system and a gas supply system arranged in the boat body, and is characterized in that the bottom surface of the boat body is provided with an inward concave air cavity; the air cavity is composed of two arcboard lateral fins; the width of the air cavity gradually increases from the head part to the tail part of the boat body, the front part of the air cavity is provided with a head platform, and the rear part of the air cavity is provided with a wedge bulge; and an air inlet used in the gas supply system to supply gas to the air cavity is arranged at the fault-step position of the head platform. The high-speed rounded bilge type boat of the invention is provided with the reasonable air cavity structure, the head platform is arranged at the front part of the air cavity, and the wedge bulge is arranged at the rear part of the air cavity, thus ensuring the stability of inlayer air in the air cavity and the resistance reducing function of the air cavity, being capable of effectively reducing frictional resistance in the sailing process of the boat body, saving fuel materials and effectively improving the propulsive efficiency.

Description

technical field [0001] The invention relates to a high-speed boat, in particular to an air-cavity drag-reducing high-speed round bilge boat which uses an air cavity to reduce the frictional resistance of the hull during navigation. Background technique [0002] At present, some large ships have an air cavity at the bottom, and inject air into the air cavity, thereby reducing the contact area between the bottom surface of the hull and the water, reducing the frictional resistance of the hull during sailing, saving fuel and effectively improving propulsion efficiency, such as U.S. Patent No. 3,595,191 discloses such an ocean-going ship with multiple air chambers at the bottom of the hull. This kind of air cavity formed by the flat hull bottom and vertical partition wall is only suitable for ships with low speed. When sailing, it will cause a large amount of air leakage in the air cavity, so that the propulsion system loses too much power, and cannot produce obvious drag reduc...

AI Technical Summary

Problems solved by technology

This kind of air cavity formed by the flat hull bottom and vertical partition wall is only suitable for ships with low speed. When boating, it will cause a large amount of air leakage in the air cavity, so that the propulsion system will lose too much power, and cannot produce obvious drag reduction effect

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