A comparison of the application of RSM and LES turbulence models in the numerical simulation of thermal and flow patterns in a double-circuit Ranque-Hilsch vortex tube

被引：51

作者：

Bianco, Vincenzo ^{[1
]}

Khait, Anatoliy ^{[2
]}

Noskov, Alexander ^{[2
]}

Alekhin, Vladimir ^{[2
]}

机构：

[1] Univ Genoa, Div Thermal Energy & Environm Conditioning, DIME TEC, Via AllOpera Pia 15A, I-16145 Genoa, Italy

[2] Ural Fed Univ, Inst Civil Engn, 19 Mira St, Ekaterinburg 620002, Russia

来源：

APPLIED THERMAL ENGINEERING | 2016年 / 106卷

关键词：

Vortex tube; Double-circuit; Ranque-Hilsch; Turbulence model; RSM; LES; ENERGY SEPARATION;

D O I：

10.1016/j.applthermaleng.2016.06.095

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The present paper reports an investigation of a double-circuit Ranque-Hilsch vortex tube using a fully three-dimensional numerical model of the turbulent compressible air flow. The main purpose of the paper is to perform a detailed analysis of the thermal and flow patterns obtained with RSM-LRR and LES turbulence models in order to understand which one is able to represent the Ranque-Hilsch energy separation effect observed in a double-circuit vortex tube in the most effective way. The LES turbulence model is found to represent the qualitative turbulence of the flow better than the RSM-LRR model. The detailed analysis of turbulence characteristics estimated by LES model indicates that turbulence has a significant impact on the energy separation phenomenon. Both LES and RSM-LRR turbulence models are shown to have a weak accuracy in the prediction of the integral characteristics of a double-circuit vortex tube. An attempt was made to improve the results achieved with LES turbulence model by means of a grid refinement and an increase of Smagorinsky constant value, but they were found to have a limited impact. This leads to the conclusion that more advanced kinds of LES turbulence model should be investigated in order to increase the accuracy of the simulation of a double-circuit vortex tube. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1244 / 1256

页数：13

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