数值分析石墨烯HEMTs瞬态传热过程  

Numerical Analysis on Transient Heat Transfer in HEMTs With Graphene

作　　者：周敬 祝捷 樊轩辉 张中印[1] 唐大伟[1] ZHOU Jing;ZHU Jie;FAN Xuan-Hui;ZHANG Zhong-Yin;TANG Da-Wei(School of Energy and Power Engineering,Key laboratory of ocean energy utilization and energy conservation of ministry of education,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学能源与动力学院,海洋能源利用与节能教育部重点实验室,大连116024

出　　处：《工程热物理学报》2020年第6期1462-1467,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金重点国际合作项目(No.51720105007);国家自然科学基金面上项目(No.51976025);中央高校基本科研业务费(No.DUT18RC(3)026)。

摘　　要：本文通过数值模拟的方法,研究了稳态和瞬态条件下,石墨烯对AlGaN/GaN高电子迁移率晶体管(HEMTs)热管理的作用。结果表明,稳态条件下,耗散功率为9 W.mm-1,有石墨烯存在的条件下,热点温度降低了约15 K;在微秒时间尺度的周期加热瞬态条件下,随工作时间增长,HEMTs各部位温度由于热累积效应而波动增大,有石墨烯存在时,温度升高的幅度明显更小,并且有在更短时间内达到温度最大值的趋势。因而,石墨烯的存在对改善自热问题具有明显的效果,尤其通过瞬态周期加热模型的分析,对在更加接近真实工作状态情况下,石墨烯增强散热效果的机制有了更加深刻的理解。The effects of graphene on the thermal management of the AlGaN/GaN high electron mobility transistors(HEMTs)under steady state and transient conditions are numerically investigated.The results show that the hot spot temperature decreased about 15 K with the effect of graphene under the steady state condition when the dissipated power was 9 W·mm-1.The temperature fluctuation is proportional to the working time due to the heat accumulation under the transient periodic heating condition on microsecond time scale.The amplitude of the increase of the temperature becomes small,and is about to saturate a maximum temperature in a short time with the effect of graphene.Therefore,graphene has a significant effect on solving the self-heating problem.And through the analysis of transient periodic heating cases,a deeper understanding on how graphene enhancing the heat dissipation in a realistic working state has been achieved.

关 键 词：高电子迁移率晶体管 自热问题 石墨烯 

分 类 号：TK112[动力工程及工程热物理—热能工程]