Steady state and transient critical heat flux of flow boiling
| Project/Area Number |
15K05828
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Kobe University |
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Principal Investigator |
Fukuda Katsuya 神戸大学, 海事科学研究科, 教授 (10127417)
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| Co-Investigator(Kenkyū-buntansha) |
劉 秋生 神戸大学, 海事科学研究科, 教授 (80294263)
柴原 誠 神戸大学, 海事科学研究科, 特命助教 (70628859)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 定常限界熱流束 / 過渡限界熱流束 / 円管内流動沸騰 / 流動沸騰開始条件 / 強制流動熱伝達 / 過渡沸騰 / 定常沸騰 / 沸騰開始 / サブクール度 / ミニチャンネル / 指数関数状発熱率 / 円管 |
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| Outline of Final Research Achievements |
The heat generation rate was controlled with exponential functions. A correlation of the flow boiling CHF was obtained based on the experimental data. Various boiling incipiencies for subcooled water flowing in a uniformly heated narrow tube were measured experimentally. The boiling signal was analyzed using such as the wavelet decomposition method. The surface superheat ascended with an increase of the heat flux until the incipient boiling point was reached. The initial temperature overshoot did not appear as the outlet pressure increased. Since the existing correlations underestimated the incipient heat flux, a semi-empirical correlation of the boiling incipience was obtained based on the experimental data.
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Report
(4 results)
Research Products
(34 results)
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[Presentation] Transient Critical Heat Flux for Subcooled Water Flowing Upward in Vertical Small Tube with Exponentially Increasing Heat Inputs2016
Author(s)
Makoto Shibahara, Katsuya Fukuda, Qiusheng Liu, Koichi Hata, Yuji Nakamura, Takeo Muroga, Masayuki Tokitani, Hiroyuki Noto
Organizer
The Fisrt Pacific-Rim Thermal Engineering Conference
Place of Presentation
Waikoloa Beach Marriott Resort and Spa, Hawaii's Big Island, Hawaii, USA
Year and Date
2016-03-13
Related Report
Int'l Joint Research
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