摘要
为解决高温下的热疏导问题,首次研究了金刚石纳米颗粒对钠钾合金高温脉动热管传热性能的影响,实验分别采用添加质量分数为0.5%金刚石纳米颗粒以及未添加金刚石纳米颗粒的钠钾合金作为工质,从启动特性、流动模式、传热性能的角度对两者进行对比分析。结果表明,添加金刚石纳米颗粒后,高温脉动热管启动更加平稳,并且可以有效促进工质单向循环流动,当倾角为30?,加热功率为2750 W时,纳米颗粒的强化作用最大可达9.5%。
To solve the problem of heat conduction at high temperature, the effects of diamond nanoparticle on the heat transfer performance of sodium-potassium alloy high-temperature oscillating heat pipes were investigated for the first time. In the experiments, sodium-potassium alloy with mass fraction of 0.5% diamond nanoparticles and sodium-potassium alloy without diamond nanoparticles were used respectively as working fluids. A comparative analysis of the two oscillating heat pipes was carried out from the perspectives of start-up characteristics, flow patterns, and heat transfer performance. The results show that the high-temperature oscillating heat pipe with the addition of diamond nanoparticles starts more smoothly and can effectively promote the unidirectional circulation flow of working fluid. The maximum nanoparticles enhancing rate of 9.5% was achieved when the inclination angle was 30?and the heat input was 2750 W.
作者
冯艳民
纪玉龙
吴梦珂
杨鑫
李亚东
刘忠浩
FENG Yanmin;JI Yulong;WU Mengke;YANG Xin;LI Yadong;LIU Zhonghao(Marine Engineering College,Dalian Maritime University,Dalian 116026,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2022年第11期3049-3060,共12页
Journal of Engineering Thermophysics
基金
国家重点研发计划(No.2019YFE0116400)
国家自然科学基金资助项目(No.51876019)
辽宁省“兴辽英才”计划(No.XLYC1807117)
大连市杰出青年科学基金(No.2020RJ03)。
关键词
高温脉动热管
金刚石–钠钾合金纳米流体
纳米颗粒
强化传热
单向循环
high-temperature oscillating heat pipe
diamond-sodium-potassium alloy nanofluid
nanoparticles
heat transfer enhancement
unidirectional circulation
