Cross flow and heat transfer of hollow-fiber tube banks with complex distribution patterns and various baffle designs
Cross flow and heat transfer of hollow-fiber tube banks with complex distribution patterns and various baffle designs
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具有复杂分布模式和各种折流板设计的中空纤维管束的横流和传热
DOI：
10.1016/j.ijheatmasstransfer.2019.118937
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发表时间：
2020-02
影响因子：
5.2
通讯作者：
Zhang Li Zhi
中科院分区：
文献类型：
--
作者：
He Kui;Zhang Li Zhi
将模式识别技术与计算流体力学相结合，研究了不同填料形式和折流板设计的中空纤维管束的压降和传热特性。流体穿过纤维堆。入口流雷诺数范围为20至180。接触器的压力降和传热系数与纤维束边缘的拓扑特征密切相关。使用模式识别技术计算总结该信息的单个参数w。接触器的压降和努塞尔数power.laww.有趣的是，这种现象与挡板设计无关，挡板设计只影响压降和传热系数的大小。一般来说，w越高results.in器的性能越差。对于w > 0.6，壁效应可以忽略不计，并且所有接触器都显示出类似的性能，而不管纤维图案如何。各种型式接触器的综合性能参数ε约为0.6。一个“插入"的策略，用于减少.w的演示。研究结果为接触器的结构优化提供了依据。
The pressure drop and heat transfer of hollow-fiber tube banks with various packing patterns and baffle.designs are studied by combining pattern recognition technology and computational fluid dynamics. The.fluid passes across the fiber bank. The inlet flow Reynolds number ranges from 20 to 180. The pressure.drop and heat transfer coefficients of the contactors are highly correlated to the topological characteristics.of the fringe of the fiber bank. A single parameter w, which summarizes this information, is calculated.using pattern recognition technology. The pressure drop and Nusselt number of a contactor exhibit power.law relations with w. Interestingly, this phenomenon is independent of the baffle design, which affects.only the magnitude of the pressure drop and the heat transfer coefficient. Generally, a higher w results.in contactors with worse performance. For w > 0.6, the wall effect is negligible, and all contactors show.similar performance regardless of the fiber pattern. The comprehensive performance parameter £ is.approximately 0.6 for all contactors with various patterns. An ‘‘insert’’ strategy that is used to reduce.w is demonstrated. The results show how to optimize the structure of contactor for industrial production.
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