| Project/Area Number |
61550710
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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 |
化学工学
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
YUU Shinichi Faculty of Engineering, Kyushu Institute of Technology, 工学部, 教授 (30026215)
|
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
|
| Budget Amount *help |
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1987: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1986: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Developing Turbulence / Large Scale Vortices / Free Jet / Velocity Vector Diagram / 2点間速度相関 / 自由乱流 / 乱流の遷移 / 渦の合一 / 大規模流れの干渉 |
|---|
| Research Abstract |
A series of measurements was made simultaneously by using arrays of hot-wire anemometers with X-probes. The data show the rows consisted of doughnut-type large-scale vortices and their frequent pairing which results in larger vortices. The interaction of these vortices beyond the jet centrline breaks the doughnut-type large-scale vortices and forms three-dimensional medium and small-sized vortices. The flow is randomized through this process. Some large scale vortices continue to pair and form the configuration of counter-rotating vortices approximately alternating on opposite sides of the jet centerline in the region far from the nozzle.
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