Visualization Chamber for Throttling and Quantitative Measurement of Cryogenic Fluids

Abstract

A visual experiment cabin for low-temperature fluid throttling and quantitative measurement, including a vacuum chamber, in which a low-temperature fluid metal inlet pipe, a transparent throttling test piece pipe, a metal The corrugated hose and the low-temperature fluid metal outlet pipe, the transparent throttling test piece tube is in the shape of a cylinder, and has through holes of different diameters along the axial direction, which serve as low-temperature fluid flow channels. The present invention utilizes the characteristics of material thermal expansion coefficients at low temperatures to cooperate with each other; utilizes metal corrugated hoses to eliminate the problem of stress concentration caused by the shrinkage of throttling parts at low temperatures; utilizes various methods such as vacuum, heat insulating brackets, heat sinks, and multi-layer heat insulation to ensure Good thermal insulation properties of the unit. The structure is simple, easy to disassemble and replace, good thermal insulation performance, good sealing, suitable for research on throttling and cavitation of cryogenic fluids.

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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