Evaluation of capillary performance of a stainless steel fiber-powder composite wick for stainless steel heat pipe

被引:33
作者
Huang, Shufeng [1 ]
Wan, Zhenping [1 ]
Zhang, Xiaoxia [2 ]
Yang, Xunhao [1 ]
Tang, Yong [1 ]
机构
[1] South China Univ Technol, Sch Mech & Automot Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] Guangdong AIB Polytech Coll, Electromech Dept, Guangzhou 51050Z, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Stainless steel fiber; Composite wick; Capillary pressure; Permeability; Overall capillary performance; FABRICATION PARAMETERS; THERMAL PERFORMANCE; PRESSURE-DROP; GROOVED WICK; DESIGN;
D O I
10.1016/j.applthermaleng.2018.12.014
中图分类号
O414.1 [热力学];
学科分类号
摘要
A novel stainless steel fiber-powder composite wick (SSF-PCW) is developed to obtain a wick with a high capillary pressure and good permeability for stainless steel heat pipes. The preparation process and micro-structural characteristics of the SSF-PCW are presented, and the capillary performance, including the permeability and capillary pressure, is experimentally investigated. Then, the capillary performance of the SSF-PCW is compared with that of other single and composite wicks. Experimental results show that the powder particle size has a significant influence on the capillary performance of the SSF-PCW. Among the three filling powder sizes, the SSF-PCW with a powder size of 75-106 mu m possesses the highest capillary pressure and rising velocity of the working fluid at the same porosity of the sintered stainless steel fiber skeleton. Compared with other reported wicks, the novel SSF-PCW yields a superior overall capillary performance, which can guide us to optimize stainless steel heat pipes. Data for Delta P-cap.K of SSF-PCW2 are approximately 2.64 times larger than that for the V-grooved composite wick. Additionally, the modified correlations are also inferred to predict the permeability and overall capillary performance of SSF-PCW.
引用
收藏
页码:1224 / 1232
页数:9
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