Research progress of flow and heat transfer in micro-pin-fins

被引：0
|
作者：
Wang, Le [1 ]
Weng, Jianhua [1 ]
机构：
[1] College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai,200090, China
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2020年 / 39卷 / 11期
关键词：
The micro-pin-fin structure can effectively increase the heat transfer area and the degree of flow chaos; which has broad application prospect in aerospace; nuclear power plant; air conditioning and other fields. However; the macroscopic heat transfer mechanism may not be applicable in the microscale due to the influence of the microscale effect; which makes the flow and heat transfer in the microscale field affected by more factors. This study reviewed the effects of different structures; nanoparticles; and different gravity levels on the flow and heat transfer mechanism of micro-pin-fins; and summarized the research results in this area. It reveals that the streamlined micro-pin-fin structure has good heat transfer performance. The particles of micron or millimeter scale are liable to settle in the liquid and block the micro-pin-fin channel; while the pressure drop of nanoparticles in the micro-pin-fin channel is small; and it is not easy to precipitate and the thermal conductivity per unit volume is higher. However; the physical properties of nanofluids can only remain stable for a short period of time. The capillary attraction of the micro-pin-fin structure can supply liquid to the heated surface in time and provide stable bubble nucleation sites when it is boiling heat transfer on the earth or under microgravity; which is helpful to improve the heat transfer coefficient. The critical heat flux and the change rule of bubble departure diameter are the focus of research on micro-pin-fins boiling heat transfer under microgravity. © 2020; Chemical Industry Press Co; Ltd. All right reserved;
D O I：
10.16085/j.issn.1000-6613.2020-0090
中图分类号：
学科分类号：
摘要：
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页码：4330 / 4341
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