| Project/Area Number |
09650179
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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 |
Fluid engineering
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| Research Institution | TOKYO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
YOSHIKAWA Kunio TOKYO INSTITUTE OF TECHNOLOGY,Interdisciplinary Graduate School of Science and Engineering, Professor, 大学院・総合理工学研究科, 教授 (70134848)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1998: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | Supersonic Folw / Swirling Flow / Nozzle / Swirl Vanes / Total Pressure Loss / Characteristics |
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| Research Abstract |
To improve the performance of disk MHD generators, it is suggested to install inlet swirl vanes to introduce azimuthal velocity component in the supersonic inert working gas flow at the inlet of the generator channel. But, currently used swirl vanes employing symmetric nozzles has a problem that flow field non-uniformity in azimuthal direction grows due to incompleteness of the nozzle design.
This research first analyses the flow field around the swirl vanes and the mechanism of the fluid dynamical loss, then proposes a new asymmetric supersonic nozzle design for swirl vanes aiming at achieving the azimuthal uniformity swirling velocity field with low pressure loss. The performance of these newly designed swirl vanes using asymmetric nozzles is confirmed by wind-tunnel experiments.
Technical validity of these design methods from the viewpoint of flow field uniformity is evaluated by numerical simulation of two-dimensional turbulent flow. Finally, design optimization of the nozzles is discussed for introduction to disk MHD generators.
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