Design method for uniform gradual change type high-reality shark-imitated groove microstructure on middle-size and large-size rotor blades

Abstract

The invention relates to a design method for a uniform gradual change type high-reality shark-imitated groove microstructure on middle-size and large-size rotor blades and belongs to the field of engineering bionics techniques. The design method has the benefits that (1) the design method sufficiently considers the important fact that the middle-size and large-size rotor blades take a wing chord as a Reynolds number of a characteristic length to be changed in a radial direction of the blades; compared with an existing design which partially considers or completely ignores the fact foundation and carries out non-uniform gradual change, the design with equal width of the groove, no differentiation and uniformity is very scientific and reasonable; (2) compared with an existing non-uniform gradual change, simplified low-reality shark-imitated anti-drag and noise-reducing microstructure design, the design method for the uniform gradual change type high-reality shark-imitated groove microstructure can guarantee the more efficient actual utilization effect and each part in a virtual partition of the rotor blade can be close to or have a maximized simulated biological function.

Description

technical field [0001] The invention relates to a design method for a uniform and gradual high-fidelity imitation shark groove microstructure on a medium and large rotor blade. The invention relates to a method for realizing high-efficiency bionic drag reduction and noise reduction through the uniform and gradual change design of groove microstructures, which belongs to the technical field of engineering bionics. Background technique [0002] The shark known as the "shark skin effect" is a successful example of biological evolution. The currently known "shark skin effect" couples various biological functions such as drag reduction, noise reduction, desorption, and protection. The level groove structure is an important structural element that contributes to the "shark skin effect". Practical problems. [0003] The enlargement of the rotor system is one of the important ways to reduce the cost of use. With the increase of the rated power of the rotor system, the diameter of...

AI Technical Summary

Problems solved by technology

For medium and large rotor blades, the linear speeds of different radial position areas are different or even quite different during normal operation. Obviously, the microstructure design cannot achieve efficient drag and noise reduction effects in different radial positions at the same time, and the improvement of the reliability and life of the whole machine is also relatively limited.

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