Fluid Flow and Heat Transfer in Plate-Fin and Tube Heat Exchangers in a Transitional Flow Regime
Fluid Flow and Heat Transfer in Plate-Fin and Tube Heat Exchangers in a Transitional Flow Regime
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DOI：
10.1080/10407782.2011.627802
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发表时间：
2011-11
期刊：
影响因子：
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通讯作者：
Li-Zhi Zhang;W. Zhong;Jia-ming Chen;Jingjing Zhou
中科院分区：
文献类型：
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作者：
Li-Zhi Zhang;W. Zhong;Jia-ming Chen;Jingjing Zhou
采用大涡模拟技术（LES）对翅片间距为2.06 ~ 16.48 mm、管径为8.28 mm的平板管板式换热器内流体的非稳态流动与传热特性进行了研究。模拟了通道中管道引起的速度脉动和旋涡脱落。结果表明，大间距通道内的流动与小间距通道内的流动有很大的不同。流动由两种效应共同决定：管道效应和管束效应。翅片间距越大，管束效应越明显。
The unsteady behaviors of fluid flow and heat transfer in plain plate-fin and tube heat exchangers with a wide range of fin spacings from 2.06 mm to 16.48 mm and tube diameter 8.28 mm are studied by a large eddy simulation technique (LES). Velocity fluctuations and vortex sheddings induced by the tubes in the channel are modeled. The results found that the flow in passages of large spacings is quite different from that of small spacings. The flow is co-determined by two effects: the duct effect and the tube bank effect. The tube bank effect is more dominant with increasing fin spacings.