| Project/Area Number |
09555233
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
化学工学一般
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| Research Institution | Kagoshima National College of Technology |
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Principal Investigator |
ESAKI Shuji Kagoshima Nat. Col. Tech., Dept. Mech. Eng. Professor, 機械工学科, 教授 (40185111)
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| Co-Investigator(Kenkyū-buntansha) |
FURUKAWA Masahiro SANYO Electric Co. Ltd., Researcher, 吸収式技術部, 研究員
SHII Yasuyuki Kagoshima Nat. Col. Tech., Dept. Mech. Eng. Assistant, 機械工学科, 助手 (30270391)
NAKASHIMA Masahiro Kagoshima Nat. Col. Tech., Dept. Mech. Eng. Professor, 機械工学科, 教授 (70124170)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥4,600,000 (Direct Cost: ¥4,600,000)
Fiscal Year 1999: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1998: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1997: ¥2,400,000 (Direct Cost: ¥2,400,000)
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| Keywords | Nozzle / Multi-phase Flow / Bubble / Gas Entrainment / Jet |
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| Research Abstract |
An experimental study was made to develop the automatic non-condensed gas purge system by using the multi-nozzle jets. Experiments were carried out in air-water system under condition of atmospheric pressure. Experimental parameters considered were the number of the nozzle, the pitch of the nozzle, the diameter of the nozzle, the velocity of the water jet, the height of the multi-nozzle from the liquid surface in a test pipe and the diameter of the test pipe. As the result, the jets injected from the multi-nozzle in the case of the nozzle pitch under 7mm join and become a large jet. Therefore, the gas entrainment for the multi-nozzle is almost the same that for the single large nozzle. On the other hand, jets from the multi-nozzle independently hit the water surface in the case of the nozzle pitch which is more than 10mm and the gas entrainment of the multi-nozzle is greater than that of the single nozzle. Then, it was revealed that the use of the multi-nozzle with many small holes rather than single large hole is useful to increase the gas entrainment if the total flow rate of the jets is the same.
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