| Project/Area Number |
25820071
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Thermal engineering
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| Research Institution | Akita National College of Technology |
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Principal Investigator |
NOZAWA Masakazu 秋田工業高等専門学校, その他部局等, 准教授 (60447183)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 極低温流体 / 伝熱・流動特性 / マイクロチャネル / 狭小流路 / 伝熱特性 / 二重円管 / 気液二相流 |
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| Outline of Final Research Achievements |
The application of superfluid helium to the field of medicine was investigated. Some concentric bi-cylindrical channels which imitate the cryoprobe for the cryosurgery were turned out and the heat transfer characteristics were clarified. In the experiments, the temperature and pressure variation in the liquid nitrogen forced flow during heating was measured. The relation between the heat transfer coefficient and flow rate could be clarified by the temperature measurements. In the small flow rate, the heat transfer coefficient hardly changed. On the other hand, in the large flow rate, the heat transfer was promoted with the increase of the flow rate. In the pressure measurements, it was found that the liquid nitrogen forced flow had the pressure oscillation. The peak frequency of the pressure oscillation was about 200 Hz. However, as the flow rate increased, the peak frequency was vanished.
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