圆柱发热体内圆截面液冷通道的构形优化  

Constructal Optimization of Liquid Cooling Channels With Circular Section in a Cylindrical Heating Body

作　　者：李云峰 谢志辉[1] 陈林根 冯辉君 LI Yunfeng;XIE Zhihui;CHEN Lingen;FENG Huijun(College of Power Engineering,Naval University of Engineering,Wuhan 430033,China;Institute of Thermal Science and Power Engineering,Wuhan Institute of Technology,Wuhan 430205,China;School of Mechanical&Electrical Engineering,Wuhan Institute of Technology,Wuhan 430205,China;Hubei Provincial Engineering Technology Research Center of Chemical Equipmen,tW,uhan 430205,China)

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]武汉工程大学热科学与动力工程研究所,武汉430205 [3]武汉工程大学机电工程学院,武汉430205 [4]湖北省绿色化工装备工程技术研究中心,武汉430205

出　　处：《工程热物理学报》2024年第7期1908-1916,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51979278,No.51579244,No.51506220)。

摘　　要：建立了一类在均匀产热的圆柱发热体中嵌入圆截面等温液冷通道的热源-热沉集成模型,基于构形理论,给定圆柱发热体截面积和通道截面积占比为约束条件,以液冷通道数及其半径为设计变量,研究了液冷通道分布对集成模型散热能力的影响,获得了不同液冷通道截面积占比下的最优构形。当通道截面积占比和通道数给定时,均存在最优的圆心距使得热源-热沉整体的散热性能最优,但对应两个指标的最优圆心距不同。给定通道截面积占比时,无量纲最高温度和无量纲当量热阻均随通道数的增加而降低;给定通道数时,无量纲最高温度和无量纲当量热阻均随通道截面积占比的增加而降低。本文所得研究结果可对圆柱器件高效冷却的热设计提供理论指导。An integrated model of heat source and heat sink,in which circular section isothermal liquid cooling channels are embedded in a cylindrical heating body with uniform heat generation,is established.Based on the constructal theory,given the cross-sectional area of cylindrical heating body and the ratio of channel cross-sectional area as the constraints,the influence of the distribution of liquid cooling channels on the heat dissipation capacity of the integrated model is studied with the number and the radius of liquid cooling channels as design variables,and the optimal constructs with the different ratios of cross-sectional area of liquid cooling channels are obtained.When the ratio of channel cross-sectional area and the number of channels are given,there are optimal center distances,which make the overall heat dissipation performance of heat source-heat sink reach the optimal,but the optimal center distances corresponding to the two indexes are different.When the ratio of crosssectional area of channels is given,the dimensionless maximum temperature and the dimensionless entransy equivalent thermal resistance decrease with the increase of channel number.When the number of channels is given,the dimensionless maximum temperature and the dimensionless entransy equivalent thermal resistance decrease with the increase of the ratio of cross-sectional area of channels.The results obtained in this paper can provide theoretical guidelines for the thermal design of efficient cooling of cylindrical devices.

关 键 词：构形理论 理论 电子器件散热 热设计 广义热力学优化 

分 类 号：TK123[动力工程及工程热物理—工程热物理]