| Project/Area Number |
23560199
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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 |
Fluid engineering
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| Research Institution | Kumamoto University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | 混相流 / マイクロチャンネル / 気液二相流 / 曲がり流路 / 急縮小 / 急拡大 / 曲り / 圧力変化 / 曲がり / 圧力損失 / 気泡長さ |
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| Research Abstract |
Singularities, such as bend, contraction and/or expansion, are commonly used in a two-phase micro-reactor and micro-heat exchanger systems. It is thus essential to understand the effects of the singularities on two-phase flow characteristics in microchannel for developing and designing such micro-systems. The purpose of this study is to investigate the effects of singularities and/or liquid properties on two-phase flow characteristics such as flow regime, void fraction and pressure drop in horizontal rectangular microchannels. Distilled water, pure ethanol and Hydrofluoroether 7200 were used as the test liquids, while nitrogen gas as the test gas. 180 degree return bend, sudden contraction and sudden expansion were tested as the singularities, and the two rectangular microchannels for each singularity with different curvature ration and flow area contraction or expansion ratios were used. Finally, a new correlation was developed to predict the pressure drop due to each singularity.
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