Numerical Thermal Analysis and 2-D CFD Evaluation Model for An Ideal Cryogenic Regenerator

Almtireen, Natheer; Brandner, Juergen J.; Korvink, Jan G.

doi:10.3390/mi11040361

Cited by 2 publications

(2 citation statements)

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“…A Matlab code was developed to test different numerical algorithms for an ideal closed-cycle regenerative cryocooler [30]. The parametric study reveals that the regenerator with a higher length-to-wire-diameter ratio is comparatively inefficient compared with the model with a lower length-to-diameter ratio.…”

Section: Introductionmentioning

confidence: 99%

Correlations Based on Numerical Validation of Oscillating Flow Regenerator

et al. 2022

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Stirling regenerator is one of the emerging heat exchanger systems in the area of cryogenic cooling. Many kinds of research have been conducted to study the efficiency of Stirling regenerators. Therefore, the principles and related knowledge of Stirling refrigerators must be thoroughly understood to design a regenerator with excellent performance for low-temperature and cryogenic engineering applications. In this study, an experimental setup is developed to estimate the pressure drop of the oscillating flow through two different wire-mesh regenerators, namely, 200 mesh and 300 mesh, for various operating frequencies ranging from 3 (200 RPM) to 10 Hz (600 RPM). Transient, axisymmetric, incompressible, and laminar flow governing equations are solved numerically, and source terms are added in the governing equations with the help of the porous media model and the Ergun semiempirical correlation, assuming that the wire meshes are cylindrical particles arranged uniformly. Simulation results show that the numerical predictions of temporal pressure variation are in reasonably good agreement with those of experimental findings. It is also found that the Ergun correlation works more accurately for higher flow rate conditions.

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Section: Introductionmentioning

confidence: 99%

Correlations Based on Numerical Validation of Oscillating Flow Regenerator

et al. 2022

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“…In these closed-cycle cryocoolers, the regenerator is a key component for the overall performance of the system. Almtireen et al [ 9 ] developed a one-dimensional numerical model, based on the discretization of the ideal regenerator thermal equations, to study the thermal interaction between the working gas and the metallic porous medium for various geometric and operating conditions. A 2D axisymmetric Computational Fluid Dynamics (CFD) model was also built on ANSYS Fluent to evaluate the validity of the ideal regenerator model.…”

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confidence: 99%