| Project/Area Number |
60550466
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属精錬・金属化学
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
TANIGUCHI Shoji Faculty of Engineering, Tohoku Univ., Associate Professor, 工学部, 助教授 (00111253)
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| Co-Investigator(Kenkyū-buntansha) |
KIKUCHI Atsushi Faculty of Engineering, Tohoku Univ., Professor, 工学部, 教授 (00005307)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1986: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1985: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Gas Injection / Liquid Iron / Liquid-Liquid Mass Trnsfer / Model Experiment / Volumetric Coefficient / Power Spectrum / コンピュータシミュレーション |
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| Research Abstract |
Model experiments by the use of water and its analysis were made in order to obtain fundamental knowledge on the stirring of liquid iron and the liquid-liquid mass transfer by gas injection.
1. Flow in the system: Flow pattern in water and appearance of droplet formation were observed in the water-benzene system stirred by nitrogen. The existence of large recirculating flow in water and the increase in number of benzene of benzene droplets with gas-flow rate were confirmed.
2. Liquid-liquid mass transfer: Transfer rate of acetophenone from benzene to water were measured under the various conditions of gas-flow rate, the height of benzene and water, and the radius of vessel. The results were correlated by two empirical equations-at low gas-flow rate and at high gas-flow rate. At high gas-flow rate, the effect of gas-flow rate on the volumetric coefficient, <k_LA> , was very large because of the benzene-droplet formation. Contribution of droplet formation was estimated by using the empirical equation at low gas-flow rate and the measured results of the amount of droplet in water and its average diameter. Calculated values of <k_LA> agreed well with observed ones.
3. Characteristics of turbulence in the system: Turbulence-analysing system composed of a hot wire anemometer and a FFT analyser was used for the measurements of the distributions of time-averaged velocities and the turbulent kinematic energies. This system was also used for the analysis of power-spectrum of turbulence. It was found that the characteristics of turbulence in the present system was very similar to those of the isotropic turbulence.
4. Simulation of flow: The 0-equation model which is the most fundamental model of turbulence was used for the estimation of the time-averaged distributions of local gas holdup and flow pattern.
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