Electrohydrodynamic Swirl-Flow Generators for Application in Thermal Management

IF 1.1 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Thermophysics and Heat Transfer Pub Date : 2023-05-03 DOI:10.2514/1.t6741

S. C. Lin, Bert Huang, S. Liou, F. Lai

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引用次数: 0

Abstract

The arrangement of electrodes in an electrohydrodynamic (EHD) gas pump inside a square channel is experimentally examined for its effective use in thermal management. Particularly, the study looks into modifying the characteristics of flow produced by an EHD gas pump through the arrangement of its electrodes. The aim is to produce swirl flow, which can effectively increase the flow mixing inside the channel and leads to the desired outcome. To this end, a two-stage gas pump powered by direct-current voltages ranging from 24 to 26 kV with electrodes flush mounted on two neighboring walls is devised. In addition to the volume flow rate produced, the performance of the pump is evaluated using an energy efficiency factor, which is defined as the volume flow rate delivered by a unit power input. It is found that the EHD gas pump with offset electrodes can not only produce more volume flow rate but also has a larger value for energy efficiency, which may be more favorable for the application in thermal management. The present results reveal that the EHD gas pump has great potential for applications in thermal management and can be more energy efficient when operated with uneven applied voltages.

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用于热管理的电流体动力旋流发生器

对方形通道内电流体动力(EHD)气泵的电极布置进行了实验研究，以证明其在热管理中的有效应用。特别地，该研究着眼于通过电极的布置来改变EHD气泵产生的流动特性。其目的是产生旋流，这可以有效地增加通道内的流动混合，从而达到预期的效果。为此，设计了一种两级气泵，由24至26 kV的直流电压供电，电极齐平安装在相邻的两面墙上。除了产生的体积流量外，还使用能效系数来评估泵的性能，能效系数定义为单位功率输入所产生的体积流量。研究发现，偏置电极的EHD气泵不仅可以产生更大的体积流量，而且具有更大的能效值，更有利于在热管理方面的应用。目前的研究结果表明，EHD气泵在热管理方面具有很大的应用潜力，并且在不均匀电压下运行时可以提高能效。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.