Visual experiment cabin for low-temperature fluid throttling and quantitative measurement

Abstract

A visual experiment cabin for low-temperature fluid throttling and quantitative measurement comprises a vacuum cavity, a low-temperature fluid metal liquid inlet pipe, a transparent throttling test piece pipe, a metal corrugated hose and a low-temperature fluid metal liquid outlet pipe are coaxially and sequentially arranged in the vacuum cavity in the radial direction, the transparent throttling test piece pipe is cylindrical, and through holes with different diameters are formed in the axial direction and serve as low-temperature fluid flowing channels. The visual experiment cabin is realized by mutual cooperation of thermal expansion coefficient characteristics of materials at low temperature; the metal corrugated hose is used for eliminating the problem of stress concentration caused by low-temperature shrinkage of the throttling piece; and good heat insulation performance of the device is guaranteed through multiple modes of vacuum, heat insulation supports, heat sinks, multi-layer heat insulation and the like. The cabin is simple in structure, easy to disassemble and replace, good in heat insulation performance, good in sealing performance and suitable for research of throttling, cavitation and other phenomena of low-temperature fluid.

Description

technical field [0001] The invention relates to the technical field of low-temperature throttling refrigeration, in particular to a detachable, self-sealing visualization device for research and quantitative measurement of low-temperature fluid throttling characteristics. Background technique [0002] Throttling refers to the phenomenon that the flowing fluid passes through a suddenly reduced section and the pressure is reduced. Cavitation is a phenomenon in which the internal pressure of a liquid drops below the saturated vapor pressure of the local thermodynamic state and vaporization occurs. Throttling components such as orifice plates, venturi tubes, expansion valves, nozzles, etc., have many engineering application scenarios. The cavitation phenomenon is also easy to occur with the throttling process. [0003] Cryogenic fluids, such as liquid hydrogen, liquid oxygen, liquid helium, and liquefied natural gas, are widely used in aerospace technology, superconducting coo...

AI Technical Summary

Problems solved by technology

The main features of the present invention are: use the difference in cold shrinkage of different materials at low temperature to cooperate, thereby solving the sealing problem between the throttling test piece that is often disassembled and replaced, and the metal inlet and outlet pipelines; the metal corrugated hose Eliminate the problem of stress concentration caused by the shrinkage of the throttling parts at low temperature; the transparent throttling test piece is easy to observe, and the throttling test piece and the pipelines at both ends are connected by flanges for easy disassembly and replacement; Layer insulation and other methods to ensure good thermal insulation performance of the device

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