A cavitation suppression airfoil device

Abstract

The invention provides a cavitation suppressing airfoil device, which includes an airfoil and a slider, the slider is movably installed in the airfoil, and any sliding surface of the slider is in contact with the airfoil surface. There are several arranged grooves, through the movement of the slider, the grooves on the sliding surface of any one of the sliders are at least connected to the adjacent grooves on the surface of the airfoil that it contacts, for Form at least one pressure-reducing channel along the flow direction; the airfoil is provided with an inlet and outlet communicating with the pressure-reducing channel, and the groove and airfoil on the slider are changed by the movement of the slider The cross-section between the grooves on the top is used to adjust the flow capacity of the pressure-reducing channel. The invention has a simple and compact structure, and the adjustable pressure-reducing flow channel can meet the specific anti-cavitation requirements of fluid machinery under different operating conditions, and has broad development space and application prospects.

Description

technical field [0001] The invention relates to the field of fluid machinery, in particular to a cavitation suppressing airfoil device. Background technique [0002] During the operation of fluid machinery, when the temperature is constant and the pressure inside the flow field drops to the saturated vapor pressure, the fluid medium will vaporize, and the gas dissolved in the liquid will precipitate out and gradually develop into cavitation. When the cavitation flows into the high-pressure area along with the fluid medium, the cavitation is squeezed and will shrink or even collapse. Accompanied by the generation, development and collapse of voids, a series of physical changes will also occur, and this process is called cavitation. Cavitation is a seriously harmful phenomenon in hydraulic machinery, which will cause serious vibration, noise and cavitation problems. Taking effective measures to control its occurrence is of great significance to the safe operation of hydraulic...

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Problems solved by technology

However, on the other hand, although the existing products can supplement the pressure on the suction surface, the direct pressure difference between the suction surface and the pressure surface is relatively large, which will lead to a state of flow instability on the suction surface. The airfoil structure that suppresses the above-mentioned deficiencies and cavitation is imminent

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