杨洪海,KHANDEKAR Sameer,GROLL Manfred
YANG Hong-hai1,KHANDEKAR Sameer 2,GROLL Manfred 2(1.Donghua University

• 1:东华大学
• 2:德国斯图加特大学

摘要(Abstract)：

对多弯头数平板状闭式回路脉动热管进行了可视化试验研究。在180×120×3 mm3的铝板上加工出40个首尾相接的正方形槽道(每个槽道横截面尺寸2×2 mm2,长165 mm),构成闭式回路。采用酒精为工作介质,充液率在10%~90%范围内变化,安装角度可任意调节。通过试验,系统观察平板内部的流型及流态转换规律,探讨其运行机理。
A visual study on a flat plate closed loop pulsating heat pipes was performed,which consists of 40 square channels(cross section 2×2 mm2 and length 165 mm for each channel) machined directly on an aluminum plate with overall size 180 ×120×3 mm3.Ethanol was used as the working fluid and its filling ratio ranged from 10% to 90%.The set up can be tilted freely,so three heat modes were compared,such as bottom heat mode(+90),horizontal heat mode(0) and top heat mode(-90),respectively.As a result,various flow patterns and their transitions are observed and found to be related to the fill ratio,heat mode and heat load,also the operational characteristics and working mechanism are discussed.

关键词(KeyWords)： 平板状闭式回路脉动热管;多弯头数;流型;运行机理;可视化
flat plate closed loop pulsating heat pipes;high number of turns;flow patterns;operational characteristics;visible

Abstract:

Keywords:

基金项目(Foundation): 德国国家自然科学基金(GR-412/33);; 上海市重点学科建设项目(B604)

作者(Author): 杨洪海,KHANDEKAR Sameer,GROLL Manfred
YANG Hong-hai1,KHANDEKAR Sameer 2,GROLL Manfred 2(1.Donghua University

参考文献(References)：

• [1]Xu J L,Li Y X,Wong T N.High speed flow visual-ization of a closed loop pulsating heat pipe[J].Int.J.Heat and Mass Transfer,2005,48(16):3338-3351.
• [2]杨洪海,S.Khandekar,M.Groll.脉动热管技术的研究现状与前沿热点[J].东华大学学报,2006,32(3):134-138.
• [3]杨洪海,S.Khandekar,M.Groll.单回路闭式脉动热管内流型的实验研究[J].流体机械,2007,35(1):60-63.
• [4]尹大燕,贾力.振荡热管管内流型对传热性能的影响.[J]应用基础与工程科学学报,2007,15(3):363-368.
• [5]商福民,刘登瀛,冼海珍,等.非均匀截面自激振荡流热管内热传输特性实验研究[J].热能动力工程,2007,22(2):201-204.
• [6]周岩,曲伟.脉动热管的毛细结构和尺度效应实验研究[J].工程热物理学报,2007,28(4):646-648.
• [7]Khandekar S,Schneider M,Schafer P,et al.Ther-mofluiddynamic study of flat plate closed loop pulsa-ting heat pipes[J].Microscale Thermophysical Eng.,2002,6(4):303-318.
• [8]曹小林,周晋,宴刚.脉动热管的结构改进及其传热特性的试验研究[J].工程热物理学报,2004,25(5):807-809.