翼型印刷电路板式换热器的流动与换热特性
Flow and Heat Transfer Characteristics of Airfoil Printed Circuit Heat Exchanger
摘要: 换热器是液化天然气(LNG)运输使用过程的关键设备，印刷电路板式换热器具有体积小、耐高温高压等优点，可以作为该过程的汽化器，其流动换热特性对天然气汽化过程有着显著影响。因此，本文采用数值模拟的方法，以LNG为流动工质，建立NACA0020翼型换热器模型，研究翅片的不同交错间距和垂直间距对换热器流动换热性能的影响。研究结果表明，翅片交错排列的综合换热性能优于翅片并排布置，翅片交错间距Ls = 3 mm时，换热器的流动换热性能最好。随着垂直距离的增大，换热器的流动换热性能增强。将翼型印刷电路板式换热器与箭鱼型印刷电路板式换热器的模拟结果进行对比分析表明，箭鱼型印刷电路板式换热器具有更好的减阻效果，并且其综合换热性能比翼型印刷电路板式换热器更好。
Abstract: Heat exchanger is the key equipment in the transportation and application of liquefied natural gas (LNG). Printed circuit heat exchanger has the advantages of small volume, high temperature and high pressure resistance, which can be used as the vaporizer of the process. Its flow and heat transfer characteristics have a significant impact on the vaporization process of natural gas. Therefore, numerical simulation method is used to establish NACA0020 airfoil heat exchanger model with LNG as flow working fluid to study the influence of different staggered and vertical fin spacing on the flow and heat transfer performance of heat exchanger. The results show that the comprehensive flow and heat transfer performance of staggered fins is better than that of side-by-side fins. With the increase of vertical distance, the flow and heat transfer performance of heat exchanger is enhanced. Comparing the simulation results of the airfoil printed circuit heat exchanger and the swordfish printed circuit heat exchanger, it shows that the swordfish printed circuit heat exchanger has better drag reduction effect, and its comprehensive heat transfer performance is better than that of the airfoil printed circuit heat exchanger.
文章引用：成金东, 王波, 王雅亮, 沈佳飞, 孙聪聪, 陈相煜. 翼型印刷电路板式换热器的流动与换热特性[J]. 建模与仿真, 2021, 10(3): 877-889. https://doi.org/10.12677/MOS.2021.103087

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