Bionic propeller

Abstract

The invention aims to provide a bionic propeller. The bionic propeller comprises a blade. A guiding edge portion of the blade is of a concave-convex front edge structure, and a blade tip of the blade is of a sawtoothed structure. The concave-convex front edge structure comprises fourteen protruding nodes, the sizes of the protruding nodes sequentially decrease from the middle of the guiding edge portion to two sides, a smooth transition effect is achieved from the protruding nodes to the blade tip and the blade, and tangent planes at a convex position and a concaved position of each protruding node are both shaped like wing tangent planes. The sawtoothed structure comprises four sawteeth, the sawteeth are distributed in a region of 17 degrees to 25 degrees from the edge to the center line of the blade, inward sawtooth concaves and outward sawtooth cusps are formed in the blade tip of the blade, and the projection of each sawtooth is an isosceles triangle. The bionic propeller enables a boundary separation region on the surface of the blade to be obviously reduced relative to a standard blade, so a stalling angle is increased; the bionic propeller can make full use of the power of a main engine under various working conditions, reduce waste of the power of main engines of a conventional propeller and a ducted propeller, reduce generated cavitation noise, and improve the utilization efficiency of ship energy.

Description

Technical field [0001] The present invention relates to a ship propeller, specifically a propeller. Background technique [0002] As the most common propeller for 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 provided by propellers. In recent years, issues such as increasing propeller thrust and efficiency and reducing cavitation have become hot topics in research on propeller hydrodynamic performance. [0003] a. Concave-convex front edge structure [0004] With the development of science and technology, people are no longer satisfied with the hydrodynamic performance provided by traditional wings. In order to increase the lift of the fins, people use the method of imitating the protrusions on the leading edge of the pectoral fins of humpback whales to achieve the purpose of increasing the lift of the fins. A new design idea is propose...

AI Technical Summary

Problems solved by technology

Foreign scholars put forward the concept of zigzag blade tip based on the low-noise principle of nocturnal owl wings. Some scholars have applied it to the research of eliminating the sound of propellers, but the research on noise reduction is still in its infancy.

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