摘要
论文用数值方法分析了热负荷作用面为圆形的电器件散热器散热特性.研究结果表明:散热器最高温度主要集中在热负荷作用区肋基部位;热负荷对热阻影响不大;散热器材质导热系数对热阻有较大影响;指示风速的雷诺数对热阻有较大影响;当散热器其它参数一定时,热阻随热负荷作用面直径变化而变化,通过改变作用面直径可获得最小热阻.
This paper reports the heat transfer characteristics of the heat sink having a circular heating area.A numerical methods is used in this process.The results show that the maximum temperature is located mainly at the locations near the fin base in the heating area.Thermal load has little effect on thermal resistance,the thermal conductivity of the radiator material has great influence on thermal resistance.The Reynolds number of indicating wind speed has great influence on thermal resistance.The thermal resistance varies with the diameter of the heating area when other parameters are fixed.The minimum thermal resistance can be obtained by changing the diameter of the heating area.
作者
卢鑫
张金龙
武振锋
王良璧
LU Xin;ZHANG Jing-long;WU Zhen feng;WANG Liang-bi(School of Mechanical and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of Railway Vehicle Thermal Engineering Ministry of Education,Lanzhou JiaotongUniversity,Lanzhou 730070,China)
出处
《兰州交通大学学报》
CAS
2021年第4期88-94,共7页
Journal of Lanzhou Jiaotong University
基金
国家自然科学基金(51776093)
兰州交通大学青年科学基金项目(2020040)。
关键词
电器件散热器
圆形热负荷面
热阻
数值方法
electrical heat sink
heat load action area as circular shape
thermal resistance
numerical method
