Experimental Study on Localized Hot Spot Jet Impingement Flow Boiling

被引：0
|
作者：
Tang, Kai [1 ]
Huang, Yanpei [2 ]
Guo, Yuandong [1 ]
Lin, Guiping [1 ,3 ]
Yang, Qi [2 ]
Miao, Jianyin [2 ]
Huang, Jinyin [2 ]
机构：
[1] Laboratory of Fundamental Science on Ergonomics and Environmental Control, School of Aeronautic Science and Engineering, Beihang University, Beijing,100191, China
[2] Beijing Key Laboratory of Space Thermal Control Technology, Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing,100094, China
[3] International Innovation Institute, Beihang University, Hangzhou,311115, China
来源：
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | 2024年 / 45卷 / 06期
关键词：
Ammonia - Heat flux - Heat transfer - Jets - Microchannels - Thermal load;
D O I：
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中图分类号：
学科分类号：
摘要：
This paper proposed a jet-impingement microchannel heat sink to address high-heat-flux hot spot cooling issues. Using ammonia as the working fluid, flow boiling experiments were conducted to comparatively study the impact of microchannels and stagnation point structures on the heat sink’s performance. The optimized configuration, comprising peripheral pin fins and central multi-cone, effectively dissipated a heat load of 752 W·cm−2 within a 1 mm×6 mm hot spot area, maintaining the heating surface temperature below 57.1◦C. The corresponding thermal resistance and pressure drop were 0.69 K·W−1 and 5.1 kPa, respectively. Subsequent experimentation on this optimized heat sink revealed that variations in the heat load upstream significantly influenced the inlet quality of the downstream heat sink, consequently impacting its thermal-hydraulic performance. © 2024 Science Press. All rights reserved.
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页码：1743 / 1748
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