A Longitudinal Flow Transition Semi-planing Boat

Abstract

The invention belongs to the technical field of high-performance ships, and relates to a planing boat type, in particular to a longitudinal flow transitional semi-planing boat. When the longitudinal flow transitional semi-planing boat of the present invention sails at a relatively high speed in a transition state, the air enters from the bell mouth of the bow under the action of ramming and mixes with the water flow at the bottom of the boat to form a water-air mixture. The effect of lubrication and drag reduction has been achieved. The straight-walled side of the boat reduces the wave-making of the hull, which has the effect of reducing the pressure difference resistance. Compared with the channel planing boat, the wet surface area of ​​the present invention is small at medium and low speeds, so its frictional resistance is also relatively small. Compared with the single-body planing boat, the present invention has a wider deck area for loading, and at the same time, because the bottom has a certain transverse slope angle, which is equivalent to increasing the "deep V degree" of the bottom of the planing boat, it is beneficial to reduce the Rocking and slapping in the waves improves directional stability.

Description

technical field [0001] The invention belongs to the technical field of high-performance ships, and relates to a planing boat type, in particular to a longitudinal flow transitional semi-planing boat. Background technique [0002] At present, high-performance ships are widely used in military and civilian applications due to their fast and flexible characteristics. All kinds of high-performance ships have unique advantages and disadvantages: full-cushion hovercrafts have superior speed, good maneuverability in still water, and It is less affected by water depth, tide and coastal seabed slope, but this type of boat has poor seakeeping, low economy, and relatively high construction and maintenance costs; hydrofoil boats have superior seaworthiness, but in offshore, Boundary rivers and other watersheds have deep drafts and poor resistance performance; conventional single-hull planing boats have been fully developed, but with a small deck area, the speed, seaworthiness and maneuv...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to combine the advantages of the existing planing boats, and at the same time, aiming at the problem that the existing boats have high resistance in the middle and low speed sailing state, it is proposed that the wave making in the transitional sailing stage is small, and at the same time, the gas-liquid mixed layer can be used to reduce the frictional resistance A longitudinal flow transitional semi-planing craft

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