| Project/Area Number |
07650256
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Osaka University |
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Principal Investigator |
KAJI Masuo Osaka University, Faculty of Engineering, Department of Mechanical Engineering, Associate Professor, 工学部, 助教授 (90029306)
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| Co-Investigator(Kenkyū-buntansha) |
MORI Koji Osaka University, Faculty of Engineering, Department of Mechanical Engineering,, 工学部, 助手 (00210120)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1996: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1995: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | Gas-Liquid Two-phase Flow / Annular Two-Phase Flow / Interfacial Wave Characteristics / Liquid Droplet Ectrainment / Disturbance Wave / Ripple / Industrial Bore Scope / Multiple Point Electrode Probe / 混相流 / 界面波動 / 内視鏡 / 点電極プローブ |
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| Research Abstract |
Multiple wall electric conductance probes (MWCP) and multiple point electrode probes (MPEP) were employed to investigate the time-spacial characteristics of various waves generated at gas-liquid interface of two-phase flow. Visualization of gas-liquid interface of annular two-phase flow was realized by an industrial bore scope and mechanisms of liquid droplet entrainment was studied. The results obtained are as follows.
(1)Gas-liquid interdace profiles at an diametrical cross section obtained by MPEP clearly show the transition flow condition from the slug to annular flows. Complicated structures of gas-liquid interface in the transition region are also clarified.
(2)Time-spacial characteristics of interfacial waves were presented by the MWCP measurement technique. Wave velocities are easily calculated from the time-spacial map of liquid holdup traces, and growth and decay of wave are shown in this map.
(3)Industrial bore scope was valid for visualization of gas-liquid interface of annular flow. Three dimensional structures of interfacial waves and entrained liquid droplets were observed by video pictures.
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