Pressure control system and method applied to induced wheel cavitation experiment

Abstract

The invention discloses a pressure control system and method applied to an induced wheel cavitation experiment. Three functions of pressurization, pressure reduction and degassing can be realized through the system, the gas content of water in an experiment system loop is reduced through degassing, the influence of the gas content on cavitation is reduced, and meanwhile, pressurization or pressure reduction is realized under the condition that the gas content level is relatively low, so that the credibility of the cavitation experiment is improved. The system comprises an air bag, a water storage tank, a degassing tank, a pressurizing unit, a pressure reducing unit and a degassing unit; the pressurizing unit inflates high-pressure air into the air bag, the air bag expands, and pressurizing of a water storage tank is achieved; the pressure reducing unit gradually exhausts air in the air bag to reduce the pressure of the air bag so as to reduce the volume of the air bag, so that pressure reduction of the water storage tank is realized; and communicating and circulation of the degassing unit, the water storage tank and the degassing tank are achieved, water in the water storage tank is filtered by the degassing tank to separate out gas, and the degassing unit creates a low-pressure environment in the degassing tank to discharge the separated gas, so that the water in the water storage tank is degassed.

Description

technical field [0001] The invention relates to a pressure control system applied to an inducer wheel cavitation experiment. The pressure control system can provide the pressure and gas content meeting the experiment requirements for the circulating loop of the pump cavitation experiment system. Background technique [0002] Cavitation refers to the phase transition phenomenon of a liquid when the ambient pressure is lower than the saturated vapor pressure. The initial process depends not only on the ambient pressure, but also on the gas content, surface tension, viscosity and other factors in the liquid that have been dissolved or insoluble in the liquid. related. Among them, the gas content that has been dissolved and insoluble in the liquid has a great influence on the development of cavitation and the cavitation performance of the induced wheel. These gases will be precipitated in the low-pressure area and their volume will increase, becoming the cavitation that induces ...

AI Technical Summary

Problems solved by technology

The traditional pump hydraulic experiment system directly pressurizes the water storage tank through a high-pressure air source, so the increase in pressure will lead to a significant increase in the content of soluble and insoluble gases in water

At the same time, because there is no degassing device, the inflow of the experimental section usually contains a certain amount of dissolved gas, which may also become cavitation nuclei that induce cavitation initiation and promote cavitation initiation. Therefore, this experimental system cannot accurately obtain the temperature of the tested product. Cavitation performance

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