流体机械

2018, v.46;No.557(11) 68-73+59

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带汽液分离腔的树状微通道热管运行性能研究
Experimental Investigation of Innovative Looped Heat Pipe with Tree-like Bionic Micro-channel Evaporator and Gas-liquid Separation Chamber

胡伟强;宋本哲;王志强;李伟;张莹;
HU Wei-qiang;SONG Ben-zhe;WANG Zhi-qiang;LI Wei;ZHANG Ying;Nanchang University;

摘要(Abstract):

设计了一种超薄的新型闭环热管(BLHP),该热管蒸发器部分采用树状仿生微通道代替吸液芯,并在冷端嵌入汽液分离腔。着重研究了30%~70%充液率下BLHP的运行特性和启动特性。试验结果表明:BLHP运行方向为逆时针单向循环;BLHP存在启动温度阀值,不存在启动功率阈值,最低启动温度为36.5℃;充液率70%时热阻最低(低至0.12 K/W),启动时间最短(43 s);汽液分离腔的"液池效应"具有稳定工质方向和加速启动的作用;热管中树状仿生微通道比并行通道具有更好的抗振荡特性。
a novel ultra-thin closed loop heat pipe(Bionic loop heat pipe)was designed,where tree-like bionic micro-channels were used to replace the wick structure,and there is a gas-liquid separation chamber embedded at the cold side. This paper focused on operating characteristics and start-up characteristic at different filling rates(30%~70%).The test results show that the operation direction of BLHP is counterclockwise unidirectional cycle;BLHP has startup temperature threshold and does not have startup power threshold,its minimum startup temperature is 36.5 ℃.The thermal resistance is lowest at the filling ratio of 70%(down to 0.12 K/W),and its shortest start-up time is 43 s. The"Liquid pool effect"of the gas-liquid separation chamber has the role of stabilizing orientation of circulation and accelerating the start-up process. The bionic tree-like micro-channels in the heat pipe possess better anti-oscillation characteristics than parallel channels.

关键词(KeyWords): 仿生;微通道;可视化;闭环热管;两相流
bionic;micro-channel;visual;looped heat pipe;two-phase flow

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基金项目(Foundation): 国家自然科学基金项目(11562011)

作者(Author): 胡伟强;宋本哲;王志强;李伟;张莹;
HU Wei-qiang;SONG Ben-zhe;WANG Zhi-qiang;LI Wei;ZHANG Ying;Nanchang University;

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