摘要
微通道散热器是应对电子器件散热的有效方法,但目前常规通道存在功耗大等问题。分形结构被认为是质能运输效率最高结构之一。按照Murray定律和“黄金比例phi”设计Y型和Ψ-Y型微通道的结构,得到4种微通道:Ψ-Y-M、Y-M、Ψ-Y-phi、Y-phi。研究采用Fluent进行数值模拟,结果表明,phi型结构比Murray型结构底面温度低;Ψ型结构比Y型结构的底面温度分布更均匀。引入性能系数(coefficient of performance,COP)来评价各结构的综合性能,Ψ-Y-M的COP相较于Y-M增长了约3%,Ψ-Y-phi和Y-phi的COP都小于Y-M,前者减小约6%,后者减小约18%。
In addressing the challenges of electronic devices,the microchannel heat sink has been widely recognized as an effective approach,despite facing challenges related to high power consumption.Fractal structures have been identified as the most efficient means for mass-energy transportation.Therefore,this study focuses on the investigation of structural dimensions of Y-type andΨ-Y-type microchannels based on Murray law and the"golden ratio phi".As a result,four distinct microchannel designs were obtained:Ψ-Y-M,Y-M,Ψ-Y-phi,and Y-phi.Through numerical simulations performed using Fluent,it revealed that the phi-type structure exhibited a lower bottom surface temperature compared to the Murray type structure.Additionally,theΨ-type structure demonstrated a more uniform distribution of bottom surface temperatures in contrast to the Y-type structure.To provide a comprehensive assessment of each structure's performance,the coefficient of performance(COP)was introduced.Results indicate that the COP ofΨ-Y-M increases by approximately 3%compared to that of Y-M.Conversely,bothΨ-Y-phi and Y-phi exhibit smaller COP values relative to Y-M,with the former decreasing by about 6%and the latter decreasing by about 18%.
作者
夏国栋
刘贺征
马丹丹
XIA Guodong;LIU Hezheng;MA Dandan(Beijing Key Laboratory of Heat Transfer and Energy Conservation,Beijing University of Technology,Beijing 100124,China)
出处
《北京工业大学学报》
北大核心
2025年第9期1017-1023,共7页
Journal of Beijing University of Technology
基金
北京市教育委员会资助项目(KM202210005013)。
关键词
微通道
分形
流动
换热
低功耗
数值模拟
microchannel
fractal
flow
heat transfer
low power consumption
numerical simulation
