Analysis on the fluid flow in vortex tube with vortex periodical oscillation characteristics
Analysis on the fluid flow in vortex tube with vortex periodical oscillation characteristics
复制标题
具有涡旋周期振荡特性的涡流管内流体流动分析
DOI：
10.1016/j.ijheatmasstransfer.2016.08.063
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发表时间：
2016-12
影响因子：
5.2
通讯作者：
Yang, Zhuqiang
中科院分区：
文献类型：
--
作者：
Zhang, Bo;Guo, Xiangji;Yang, Zhuqiang
为了揭示传热传质领域的一个有趣现象--涡流管内的能量传递机理，对涡流管内的动态流体流动进行了数值模拟和分析。与以往的静态研究不同，本文的重点是二次环流层的动态过程，即振荡。根据非定常三维计算的流体流动结果，证实了强迫涡或朗肯涡的存在，也证实了涡流管冷端回流的必然性。着重分析了中心回流区边界层的振荡现象，给出了二次回流区流体流动的周期性振荡、边界的变化以及截面上各点的典型频率。在此基础上，提出了一种新的涡流管能量传递机制，即边界层稳定振荡是传热传质过程的主导机制。
To reveal the energy transferring mechanism in the vortex tube, which is an interesting phenomenon in the area of heat and mass transfer, numerical simulation and analysis of the dynamic fluid flow were employed. In contrast to the previous static study, the focus of this paper is the dynamic process, or the oscillation, of the secondary circulation layer. Based on the fluid flow results derived from the unsteady 3-D computation, the existence of the forced or Rankine vortex was confirmed, which also verified the certainty of reverse flow in the cold end of the vortex tube. Then, the oscillation of the boundary layer of the central recirculation zone was emphasized and the periodical vibrating of the fluid flow within the secondary circulation zone, varying of its boundary, and the typical frequencies of points on a cross section were provided. Based on these results, a novel energy transferring mechanism in the vortex tube was proposed, under the condition that stable oscillation of the boundary layer is the dominant mechanism for the heat and mass transfer process.
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影响因子：
2
作者：
J. Cooley;J. Tukey
通讯作者：
J. Cooley;J. Tukey
影响因子：
3.2
作者：
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通讯作者：
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影响因子：
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作者：
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DOI：
10.1016/s0142-727x(02)00210-2
发表时间：
2003-04-01
影响因子：
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作者：
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通讯作者：
Behnia, M
DOI：
10.1016/j.ijheatfluidflow.2005.08.003
发表时间：
2006-04
影响因子：
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作者：
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