Fundamental study on thevortex bursting phenomena in small diameter tubes
| Project/Area Number |
23760187
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Thermal engineering
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 燃焼 / 渦流 / 火炎伝播限界 / 可燃限界 / 消炎直径 / マイクロ燃焼器 |
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| Research Abstract |
In this study, effects of the tube diameter as well as thermal and transport properties of mixture on the vortex bursting have been experimentally investigated. At first, it was found that the flame can be propagate through 2.4mm tube for propane/air mixture, which is enough less than the so called, quenching diameter. To investigate effects of the thermal / transport properties of unburned gas, further experiments have been made with various inert mixtures (N2, Ar, He, CO2). Results showed that the fuel rich side “vortex bursting limits” for CH4/Air and CH4/O2/Ar mixtures are enough higher than the conventional “upper flammability limit”. Consequently, it was found that the vortex bursting can be occur even for the conditions beyond the quenching diameter and flammability limits, in the cases of the thin flame can be established and the tip of the flame can be intensified, which correspond to the cases of the burning velocity is low enough and Le <1.
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Report
(3 results)
Research Products
(14 results)
