A hydrofoil with a new supercavitating airfoil

Abstract

The invention provides a hydrofoil boat equipped with a novel supercavitation hydrofoil, comprising a ship main body, a front hydrofoil installed at the front section of the ship main body, and a tail hydrofoil arranged at the stern, the front hydrofoil includes flat wings connected in sequence, and the oblique wing and folding wing of the new supercavitation airfoil; the tail hydrofoil includes the vertically installed NACA airfoil flap, and the new supercavitation airfoil short wing fixed horizontally on the lower end of the flap; the new supercavitation airfoil Bubble airfoil, including two pieces of suction surface and force surface connected at one end and open at the other end, and a contraction end connected with the open end. The NACA design method determines the profile. The hydrofoil boat of the present invention adopts the aero-hydraulic integrated front hydrofoil and the deep-immersion empennage with the novel supercavitation airfoil, so that the hydrofoil boat has good rapidity and high speed when sailing at high and low speeds. Stability, to achieve the effects of strong work adaptability, simple structure, reliable work, and cost-saving manufacturing.

Description

technical field [0001] The invention relates to the field of ships, in particular to a hydrofoil ship which adopts a novel supercavitation airfoil to reduce wave resistance and viscous resistance during navigation. Background technique [0002] With the continuous consumption of land resources, countries around the world regard the utilization and development of marine resources as an important strategy for social development, which puts forward an urgent demand for the development of high-performance ships. The resistance of a ship is closely related to the speed of the ship. Most of the hulls of traditional ships are immersed below the water surface, and the wet surface area is large, which increases the resistance of navigation. The viscous resistance is approximately proportional to the square of the speed, and the wave resistance is approximately proportional to the speed The sixth power of , so the improvement of the speed of traditional ships is greatly restricted. ...

AI Technical Summary

Problems solved by technology

However, when this scheme is applied to the existing common NACA hydrofoil structure, the increased cavitation at high speed will affect the aerohydrodynamic performance of the hydrofoil, and when applied to the existing supercavitating hydrofoil, it will The working efficiency at low speed will also be reduced, which cannot meet the working requirements of the ship at low speed

[0006] In addition, the technology of forming supercavitation through artificial ventilation requires the addition of additional ventilation devices, thereby increasing the complexity of the mechanism

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