Pressure distribution inside oscillating heat pipe charged with aqueous Al2O3 nanoparticles, MWCNTs and their hybrid
Pressure distribution inside oscillating heat pipe charged with aqueous Al2O3 nanoparticles, MWCNTs and their hybrid
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装有含水 Al2O3 纳米粒子、多壁碳纳米管及其混合物的振荡热管内的压力分布
DOI：
10.1007/s11771-014-2186-y
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发表时间：
2014
影响因子：
4.4
通讯作者：
S. Huh
中科院分区：
文献类型：
--
作者：
Md. Riyad Tanshen;Sinil Lee;Jun;D. Kang;J. Noh;H. Chung;Hyomin Jeong;S. Huh
振荡热管的有效热性能受管内压力分布的影响。研究了多回路OHP中负载Al 2 O3水溶液和MWCNTs/Al 2 O3纳米颗粒的压力和压力波动频率对传热的影响。在填充率为60%的条件下，研究了Al 2 O3水溶液、MWCNTs以及它们的混合物在内径为3 mm的OHP中的热阻。实验结果表明，热特性与压力分布密切相关，并强烈依赖于随时间的压力波动的数量。压力的频率取决于蒸发段的功率输入。在Al 2 O3水溶液中加入少量MWCNTs（填充率为60%），在任何蒸发器功率输入下，都能获得最高的波动频率和最低的热阻，但不同的纳米流体会导致OHP的热性能不同。
Effective thermal performance of oscillating heat pipe (OHP) is driven by inside pressure distribution. Heat transfer phenomena were reported in terms of pressure and frequency of pressure fluctuation in multi loop OHP charged with aqueous Al2O3and MWCNTs/Al2O3nanoparticles. The influences on thermal resistance of aqueous Al2O3, MWCNTs as well as the hybrid of them in OHP having 3 mm in inner diameter were investigated at 60% filling ratio. Experimental results show that thermal characteristics are significantly inter-related with pressure distribution and strongly depend upon the number of pressure fluctuations with time. Frequency of pressure depends upon the power input in evaporative section. A little inclusion of MWCNTs into aqueous Al2O3at 60% filling ratio achieves the highest fluctuation frequency and the lowest thermal resistance at any evaporator power input though different nanofluids cause different thermal performances of OHPs.