Flow-Induced Vibration and Heat Transfer Analysis for a Novel Hollow Heat Exchanger

IF 1.1 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Thermophysics and Heat Transfer Pub Date : 2023-01-01 DOI:10.2514/1.t6588

Yaru Sun, Jiadong Ji, Zisen Hua, Runmiao Gao, Chengjun Wang

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引用次数: 2

Abstract

A novel hollow shell-and-tube heat exchanger with helical elastic coiled tubes was designed to improve the overall heat transfer performance. Different numbers of helical baffles installed on the hollow helical elastic tubes (HHETs) heat exchanger were compared with the HHET heat exchanger without a baffle. The fluid–solid coupling method was provided to study the effects of the entrance velocity and baffle number on the performances of heat transfer and vibration-enhanced heat transfer. Based on the numerical results, the performances of vibration and heat transfer become more obvious by increasing the entrance velocity. Compared with the HHET heat exchanger without a baffle, adding a baffle or baffles on the HHET heat exchanger can remarkably make the fluid flow more consistent. Whereas a higher number of baffles can weaken the vibration and heat transfer performance of the novel heat exchange, the performance evaluation criteria of the HHET heat exchanger with one baffle, two baffles, and four baffles is improved by 2.04, 4.37, and 2.3%, respectively. It indicates that adding a baffle or baffles to the novel heat exchanger can effectively improve the overall thermal and hydraulic characteristics of the novel heat exchanger.

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新型中空换热器的流激振动及传热分析

为了提高换热器的整体传热性能，设计了一种新型的螺旋弹性盘管空心壳管换热器。对中空螺旋弹性管换热器与不安装折流板的中空螺旋弹性管换热器进行了比较。采用流固耦合的方法研究了入口速度和挡板数对换热性能和振动强化换热性能的影响。数值结果表明，随着入口速度的增大，振动和换热性能更加明显。与不加折流板的het换热器相比，在het换热器上加一个或多个折流板可以显著地使流体流动更加均匀。较高的挡板数量会削弱新型换热器的振动和换热性能，而单挡板、双挡板和四挡板的HHET换热器的性能评价标准分别提高了2.04、4.37和2.3%。表明在新型换热器中增加一个或多个挡板可以有效地改善新型换热器的整体热工特性和水力特性。

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来源期刊

Journal of Thermophysics and Heat Transfer 工程技术-工程：机械

CiteScore

3.50

自引率

19.00%

发文量

审稿时长

3 months

期刊介绍： This Journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. The Journal publishes qualified papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include aerothermodynamics; conductive, convective, radiative, and multiphase modes of heat transfer; micro- and nano-scale heat transfer; nonintrusive diagnostics; numerical and experimental techniques; plasma excitation and flow interactions; thermal systems; and thermophysical properties. Papers that review recent research developments in any of the prior topics are also solicited.