Variable-angle-of-attack hydrofoil cavitation water tunnel test system

Abstract

The invention discloses a variable-angle-of-attack hydrofoil cavitation water tunnel test system, and belongs to the technical field of ship and ocean engineering. The system is composed of a water tunnel observation section, fastening plates, fastening bolts, a positioning plate, positioning bolts, a threaded hole matching the positioning bolts, an angle-of-attack regulator, a limiter, a hydrofoil connecting shaft, a hydrofoil, and sealing rings. The threaded section of the hydrofoil connecting shaft passes through a through hole of organic glass, and is fixed by one fastening plate and a nut, and the other end passes through through holes of the organic glass and the positioning plate and is connected with the limiter. The limiter is connected with the angle-of-attack regulator. The angle of attack regulator is fixed to the positioning plate through the positioning bolts and the threaded hole matching the positioning bolts. The portions, inside the organic glass, of the two ends of the hydrofoil connecting shaft are each sleeved with one sealing ring. The positioning plate is fixed by the fastening plates and the fastening bolts. The fastening plates are fixed to the water tunnel observation section by the fastening bolts. Compared with the prior art, the variable-angle-of-attack hydrofoil cavitation water tunnel test system has the advantages of simple and compact structure, good stability, easy movement and disassembly, convenient regulation of angle of attack, low cost, and good tightness.

Description

technical field [0001] The invention relates to a variable attack angle hydrofoil cavitation water tunnel test system, which belongs to the technical field of marine engineering. Involving patent classification G01 Measurements; Tests G01M Tests of static or dynamic balance of machines or structural parts; Tests of structural parts or equipment not included in other classes G01M10 / 00 Hydrodynamic tests; Tests of vessels in or on tanks or waterways installation. Background technique [0002] Unstable pressure pulsations on the blade surface when propellers, water turbines and turbopumps are working usually cause mechanical vibration, noise, fatigue damage, etc. The reduction of the pressure around the blade will cause the occurrence of cavitation, and the occurrence of cavitation will cause negative effects such as cavitation on the surface of the object and a drop in thrust. The basic cross-section forms of propellers, water turbines, turbopumps, rudders, and wings are typ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the existing hydrofoil test angle of attack system with complex structure, high test cost, and complicated steps to adjust the angle of attack, and provide a variable angle of attack hydrofoil cavitation water tunnel test system, which can realize cavitation flow Free adjustment of the angle of attack of the test hydrofoil

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