Cryogenic liquid cavitation experimental device

Abstract

The invention belongs to the technical fields of fluid machinery engineering, cryogenic engineering and aerospace engineering and relates to cavitation experimental devices, in particular to a cryogenic liquid cavitation experimental device. The cryogenic liquid cavitation experimental device comprises a testing segment part, a pressure-regulating tank part and an auxiliary device part. Different from a traditional cavitation experimental device, the cryogenic liquid cavitation experimental device is characterized in that pressure and temperature adjustment is performed on the experimented cryogenic liquid through pressure control, and flowing adjustment is performed through pressure difference between a supply tank part and a collection tank part. The device can achieve synchronous collection of images, pressure data, temperature data and flow data of a cryogenic liquid cavitation flow field, and is good in experiment effect and high in safety; in addition, experiment equipment is easy and portable, convenient to disassemble and carry, small in occupied space and capable of saving experiment area.

Description

technical field [0001] The invention relates to a cavitation experiment device, in particular to a low-temperature liquid cavitation experiment device. It belongs to the technical fields of fluid mechanical engineering, cryogenic engineering and aerospace engineering. Background technique [0002] When the internal partial pressure of the liquid at a certain temperature is reduced to the saturated vapor pressure of the liquid, vaporization will occur, and the gas dissolved in the liquid will also precipitate out to form bubbles (also known as voids, cavities). After the flow moves to a place of higher pressure, the vapor in the bubble recondenses and the bubble collapses. The process of the generation, development, and collapse of cavitation in this liquid flow, as well as the resulting series of physical and chemical changes, are called cavitation. The occurrence of cavitation often leads to a decrease in machine efficiency and causes problems such as vibration, noise, an...

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Problems solved by technology

[0004] The cryogenic liquid cavitation experimental device improved on the basis of the traditional cavitation experimental device requires large-scale equipment such as an annular water tunnel, and a high-power cryogenic pump to realize liquid circulation. There are many experimental equipment and other auxiliary devices, and often only packaged insulation can be used. Thermal materials approach prevents endothermic phase transitions of cryogenic liquids

Such experimental equipment has the following disadvantages: 1. It occupies a large area, has a large investment cost, and high use and maintenance costs; 2. The experimental equipment and structure are complicated. If other types of experiments are required, it is inconvenient to replace the test section, and it is difficult Replace the flow medium; 3. Poor heat insulation makes it difficult to achieve visual observation, which affects the effect of cavitation experiments. 4. The dynamic adjustment ability of the experimental device is poor and cannot be moved. 5. The safety is poor. It is very easy to cause harm to experimenters; 6. The consumption of cryogenic liquid is large during use, resulting in more waste of resources, noise and waste pollution

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