加热工况及其倾斜角影响单环路脉动热管稳定运行的实验的研究.pdfVIP

第 31 卷 第 11 期 中 国 电 机 工 程 学 报 Vol.31 No.11 Apr.15, 2011 62 2011 年 4 月 15 日 Proceedings of the CSEE ©2011 Chin.Soc.for Elec.Eng. 0258-8013 (2011) 11-0062-06 TK 124 A 470 20 文章编号： 中图分类号： 文献标志码： 学科分类号： ⋅ 加热工况及倾斜角影响单环路脉动热管 稳定运行的实验研究 王宇，李惟毅 (天津大学热能工程系，天津市 南开区 300072) Experimental Investigations on the Influence of Heating Condition and Inclination Angle on Stable Operation of a Single Loop Pulsating Heat Pipe WANG Yu, LI Weiyi (Department of Thermal Engineering, Tianjin University, Nankai District, Tianjin 300072, China) ABSTRACT: An experimental setup based on a single loop 运行情况。主要通过传热量及运行热阻来评价热管的传热 pulsating heat pipe (SLPHP) was established and a series of 效果。实验结果表明，蒸发段加热工况在大流量(40 g/s)和 experimental observations were conducted to study the 较高温度加热条件下会出现局部干烧现象，且随着加热温 operational performance in the tested SLPHP within water. 度的升高干烧现象逐步加剧，进而影响热管的稳定运行和 Hot water bath and cold water bath were adopted as thermal 传热效果；蒸发段在较小热水流量(4 g/s)时保持稳定地运 conditions in the experimental investigations. The influence 行；重力因素严重影响到单环路脉动热管稳定运行，垂直 characterization was studied for the variation of heating 地面底部加热条件下运行效果最好。 condition in the evaporator section (different water bath 关键词：单环路脉动热管；稳定运行；加热工况；倾斜角度 temperature and different flow rate) and inclination angel 0 引言 (30°, 45°, 60°, 90°) of the SLPHP. The heat-transfer performance of the tested SLPHP was mainly evaluated by 脉动热管(pulsating heat pipe，PHP) ，也称之为 thermal resistance which related to temperature di