Active jet flow structure for improving cavitation flow around hydrofoil

Abstract

The invention discloses an active jet flow structure for improving cavitation flow around a hydrofoil. The active jet flow structure comprises a wing-shaped body, wherein an active jet flow cavity recessed into the wing-shaped body from a suction surface is formed in the wing-shaped body in the length extending direction, an opening, located in the suction surface, of the active jet flow cavity is a jet flow outlet, and the active jet flow cavity penetrates through one side wing end of the wing-shaped body in the length extension direction to form a jet flow inlet; a rectifying pin which is located between the jet flow inlet and the jet flow outlet and used for prolonging the fluid flowing path is arranged in the active jet flow cavity in a protruding manner, and the overflowing area in the active jet flow cavity is gradually reduced in the fluid flowing direction; and a rectification section located on the fluid flowing path is arranged in the active jet flow cavity in the length extension direction of the wing-shaped body, rectification holes allowing fluid to pass through are formed in the rectification section, and the distance between every two adjacent rectification holes is gradually increased in the direction away from the jet flow inlet. The problems that an existing active jet flow structure is poor in fluid distribution uniformity and poor in wing type lift-drag and flow characteristic optimization effect are solved.

Description

technical field [0001] The invention relates to the field of fluid machinery, in particular to an active jet structure for improving cavitation flow around hydrofoils. Background technique [0002] The airfoil is the basic structure in the field of fluid machinery, and has been widely used in the fields of airfoils, propeller airfoils, wind power blade cross-section airfoils, and tidal energy power blade airfoils in the aviation field. With the rapid development of science and technology and fluid machinery industry, especially with the expansion of application fields, such as tidal power generation, marine water jet propulsion, underwater vehicles and other hydraulic machinery widely used, people are no longer satisfied with the traditional The dynamic performance provided by the wing puts higher and higher requirements on the performance of the airfoil. As the density and viscosity of the fluid medium change, resulting in the change of Reynolds number and Strouhal number ...

AI Technical Summary

Problems solved by technology

Although the existing active jet technology can achieve a certain optimization effect, due to the relatively simple structure of the current active jet port, there is only a single jet channel, so the uniformity of the fluid injected from the jet port is poor, which affects the airfoil. The optimization effect of lift resistance and flow characteristics is not good, so it needs to be solved urgently

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