Simulation analysis method of light-weight miniature coaxial pulse tube refrigerator based on CFD technology

Abstract

The invention discloses a simulation analysis method of a light-weight miniature coaxial pulse tube refrigerator based on a CFD technology. The simulation analysis method comprises the following steps: (1) establishing the geometric model of the light-weight miniature coaxial pulse tube refrigerator; (2) dividing and setting control areas; (3) setting boundary conditions; (4) dividing grids; (5) establishing unsteady governing equations; (6) conducting the unsteady numerical solution; and (7) analyzing the simulation result, and predicting the refrigeration performance of the light-weight miniature coaxial pulse tube refrigerator. The two-dimensional computer simulation of the light-weight miniature coaxial pulse tube refrigerator is realized through commercial computational fluid software Fluent, the refrigeration performance of the light-weight miniature coaxial pulse tube refrigerator is predicted within a shorter time, and the development cost is reduced greatly; and the operating mechanism and the fluid characteristic in a pulse tube are known deeply by analyzing the distribution of the temperature field, the pressure field and the speed filed in the light-weight miniature coaxial pulse tube refrigerator, and the simulation analysis method has important significance in the design optimization of the light-weight miniature coaxial pulse tube refrigerator.

Description

technical field [0001] The invention relates to the field of refrigeration and cryogenic engineering, in particular to a simulation analysis method of a light-weight miniature coaxial pulse tube refrigerator based on CFD technology. Background technique [0002] The pulse tube refrigerator is a major innovation of the regenerative refrigerator. It completely cancels the ejector at the cold end, and realizes the phase difference between the pressure wave and the mass flow required for refrigeration through the operation of the phase adjustment mechanism at the hot end. On the one hand, the complete cancellation of moving parts at the cold end enables the pulse tube refrigerator to achieve low vibration, low interference and no wear at the cold end; on the other hand, after a series of important improvements, its actual efficiency has also been improved in some typical temperature regions. Reach the highest value for regenerative chillers. These remarkable advantages have ma...

AI Technical Summary

Problems solved by technology

At present, domestic research on lightweight micro-coaxial pulse tube refrigerators is still in its infancy, which is highlighted by high R&D costs, long design cycles, and lack of systematic understanding of the internal operating mechanism and fluid characteristics of micro-refrigerators. poor performance

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