Study of Choking Phenomena of Compressible Flow in Extremely Small Nozzles and its Application to Extremely small and Critical Mass Flow Meters
| Project/Area Number |
20560167
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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 | The University of Kitakyushu |
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Principal Investigator |
KAZUYASU Matsuo The University of Kitakyushu, 国際環境工学部, 教授 (30037759)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAZATO YOSHIAKI 北九州市立大学, 国際環境工学部, 教授 (30253537)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | チョーク現象 / 圧縮流れ / 臨界流量計 / 極小ノズル / 境界層 / 超音速流れ |
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| Research Abstract |
The choking phenomena of extremely small sonic or supersonic nozzles have been investigated using four nozzles with the same diameter but different boundary layer thickness at the exit of the nozzle. The effects of the boundary layer thickness at the nozzle exit to the critical pressure ratio across the nozzle when the flow is just choked have been clarified and the discharge coefficients of different shape of nozzles at the critical conditions have been obtained.
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Report
(4 results)
Research Products
(14 results)
