基于Fluent的涡流管数值模拟与结构优化研究

以Fluent数值模拟为基础, 理想二氧化碳气体为工质, 采用5因素5水平的正交分析法, 模拟研究了各结构参数对涡流管制冷性能的影响。结果发现:当冷流比为0.4时, 热端管径为4.32 mm、喷嘴流道数目为2、冷孔板直径2.39 mm、涡流管长103 mm、调节阀出口面积5 mm²的涡流管, 获得最大制冷效应13.53 K。

Design Optimization of Vortex Tube Structure by Numerical Simulation and Orthogonal Analysis

The flow field of ideal carbon dioxide in a vortex tube was empirically approximated, mathematically modeled, theoretically evaluated, numerically simulated with software FLUENT and experimentally measured with 5 factors 5 levelsorthogonal analysisfor design optimization of the vortex tube structure.The impact of the vortex tube geometry on the maximum cooling of the vortex tube was investigated.The simulated results show that the vortex tube structure significantly affects the maximum cooling to a varying degree.To be specific, at a cold flow ratio of 0.4, the optimized vortex tube, with a diameter of 4.32 mm, a length of 103 mm, a nozzle number of 2, a separation orifice diameter of 2.39 mm, and a hot end valve outlet area of 5 mm², results in the maximum cooling of 13.5 K.We suggest that the simulated results may be of some technological interest in design optimization of vortex tube.