ship bionic propeller

Abstract

The invention aims at providing a bionic propeller of a ship. The bionic propeller of the ship is characterized in that a guide edge part of a paddle is of a concave-convex leading edge structure, the concave-convex leading edge structure comprises bulged nodes, the connecting places of the adjacent bulged nodes form sunk nodes, the tangent planes of the bulged nodes and the sunk nodes take the shape of a wing tangent plane, the projection curve of the bulged nodes is a sine curve, in the expression formula of the sine curve, L represents the blade width of the bulged node at the maximum height, x is in the value range of 0-180 degrees, the expression formula of the maximum height h of the bulged node is h=L / 10, and the maximum height h is the difference between the blade width of the bulged node of the guide edge part and the blade width of the adjacent sunk node. The bionic propeller of the ship has the advantages that the power of a main engine can be fully utilized under multiple working conditions, the waste of the power of the main engines of a conventional propeller and a conduit propeller is reduced, cavitation noise is avoided, and the utilization efficiency of energy sources for the ship is increased.

Description

technical field [0001] The invention relates to a ship propulsion mechanism, specifically a propeller. Background technique [0002] As the most common propeller of ships, propellers are used on most ships, and their range is very wide. With the development of science and technology, people have higher requirements for the hydrodynamic performance that the propeller can provide. In recent years, issues such as increasing propeller thrust and efficiency and reducing cavitation have become hotspots in the study of propeller hydrodynamic performance. [0003] There are many devices for propellers to increase thrust and reduce noise. Such as: thrust fins, adjustable pitch blades, hubcap fins, fairings, etc. The propeller blade can be regarded as a twisted wing. As the angle of attack of the wing increases, the pressure change on the wing increases, the separation of the airflow advances, and the area of ​​the vortex area on the upper surface of the wing continues to increase....

AI Technical Summary

Problems solved by technology

Similarly, as the advance coefficient of the propeller increases, the angle of attack of the propeller blades also increases, the resistance generated by the propeller blades increases accordingly, and the efficiency of the entire propeller decreases accordingly

In addition, the cavitation of the propeller also increases with the increase of the angle of attack. The appearance of cavitation will reduce the performance of the propeller, cause cavitation erosion, and cause the hull pulsation pressure to increase sharply.

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