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Computational Thermal Sciences: An International Journal

年間 6 号発行

ISSN 印刷: 1940-2503

ISSN オンライン: 1940-2554

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COMPUTATIONAL ANALYSIS OF A CONVERGENT-DIVERGENT VORTEX TUBE TO ENHANCE ITS COOLING EFFECT

巻 15, 発行 1, 2023, pp. 29-50
DOI: 10.1615/ComputThermalScien.2022041119
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要約

Computational fluid dynamics (CFD) analysis of a convergent-divergent (CD) vortex tube (VT) was done to enhance its cooling performance. After the verification and validation of a straight model, the model was converted into CD model with throat diameter (dt) of 0.8, 0.7, 0.6, 0.54, 0.5, and 0.4 times the diameter of the main tube (D). The best performance was obtained for CD VT for dt = 0.6 D with maximum temperature drop of 44.99 K at cold mass fraction of 0.335, such that dt was larger than the diameter of cold orifice (dc). For dt = 0.4D (0.74dc), a shock wave was generated at a small distance from the throat. Then, the throat location from the cold end (x) was changed from 0.5 times the length of main tube (L) to 0.25L and 0.75L at dt = 0.6D. The best cooling performance was obtained at x = 0.25L and dt = 0.6D with maximum temperature drop of 49.51 K at cold mass fraction of 0.316.

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