Variable-attack-angle free surface cutting hydrofoil experiment model

Abstract

The invention provides a variable-attack-angle free surface cutting hydrofoil experiment model. The model comprises: a supporting rod which is fixedly provided with a connecting plate at the top end, and is fixedly provided with a supporting disc at the bottom end; a hydrofoil disc fixed at the top end of the hydrofoil; and adjusting holes, wherein a large circle and a small circle which are different in diameter are drawn on the supporting disc and the hydrofoil disc with the circle center as the original point respectively, positioning holes are formed in the positions, intersecting with the large circle and the small circle, of the plane coordinate system respectively, a preset number of attack angle holes are formed in the large circle and the small circle in the clockwise direction and the anticlockwise direction respectively with the positioning holes as the center, and a preset number of attack angle holes are formed in the hydrofoil disc in the anticlockwise direction along the large circle and the small circle with each positioning hole as the center. The unsteady ventilation flow characteristic of the free surface cutting hydrofoil can be researched, and connection and fixation are carried out by changing the relative positions of the screw holes of the upper disc and the lower disc, so the attack angle of the hydrofoil can be quantitatively and accurately controlled.

Description

technical field [0001] The invention relates to the field of marine ships, in particular to a cutting free-surface hydrofoil experimental model used for variable attack angles in constrained launching experiments. Background technique [0002] Maintaining maritime rights and interests is one of the most important issues. Under the general trend of miniaturization and unmanned development, new-concept ultra-high-speed surface vehicles can more effectively perform combat tasks such as rapid deployment, long-term vigilance, attack and self-defense, and achieve sustained Sexual sea area control has also become one of the focal points of consensus and competition. Among them, rapidity is one of the key indicators of such surface vehicles, and has gradually become the focus of research in various countries. [0003] Increasing the speed mainly faces the difficulties of high resistance and insufficient thrust, which are the key bottlenecks in aircraft design. The reason for the l...

AI Technical Summary

Problems solved by technology

However, due to the excessive speed of the hydrofoil during the experiment, the deceleration process of the hydrofoil and the large impact force during the launch process, the traditional hydrofoil structure with variable angle of attack has the disadvantages of poor reliability, easy damage, and high cost.

Images