Study on micro meniscus behavior in the capillary evaporator of a loop heat pipe
| Project/Area Number |
15H06287
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
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| Project Period (FY) |
2015-08-28 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | ループヒートパイプ / 三相界線 / 気液二相流 / 蒸発メニスカス / 可視化 / 最適化 / 蒸発器設計方法 / マイクログル－ブ / 多孔体 / 遠赤外線加熱 |
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| Outline of Final Research Achievements |
To develop design method for the capillary evaporator shape in a loop heat pipe, this study observed thermo-fluid behavior in the evaporator and developed a numerical model for heat transfer of the evaporator taking meniscus at a three-phase contact line (TPCL) within the case, wick, and grooves into account and a method to optimize wick shape in the evaporator. The meniscus at the TPCL was observed by developed the visualization evaporator using a quartz glass tube during the LHP operation and the meniscus oscillated with size amplitude of 10-400 μm at a steady state. The developed numerical model showed that evaporator heat-transfer coefficient increased with 80 % when the meniscus was taken into account. The developed optimization method was validated with the experimental results and the evaporator heat-transfer coefficient reached a local maximum in terms of the TPCL length.
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Report
(3 results)
Research Products
(7 results)
