2011 Fiscal Year Final Research Report
Study on Hysteretic and Asymmetric Phenomena of Shock Wave Structure in Supersonic Nozzles
| Project/Area Number |
21560180
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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 | Saga University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
マツオ シゲル 佐賀大学, 大学院・工学系研究科, 教授 (60229424)
シオミ ノリマサ 佐賀大学, 大学院・工学系研究科, 助教 (80284610)
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| Co-Investigator(Renkei-kenkyūsha) |
安信 強 北九州工業高等専門学校, 教授 (70239771)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 圧縮 / 非圧縮流 |
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| Research Abstract |
In a supersonic nozzle(Laval nozzle), a shock wave is generated in the supersonic flow downstream of the nozzle throat in case ofφc<φ<φe(φ: ratio of back pressure to stagnation pressure of the wind tunnel,φe : minimum pressure ratio for choking at the nozzle throat,φc : pressure ratio in case with the shock wave at the exit of the Laval nozzle). Here, even if value ofφis the same in the processes of an increase and a decrease ofφ, the difference for shock wave structure(position and shape of the shock wave) is expected to arise. In this study, the hysteresis phenomenon for shock wave structure in supersonic nozzles was elucidated based on experimental and simulated results comprehensively and the effect of rate of the change of pressure ratio on the hysteretic phenomenon was indicated specifically. Further, the relationship of hysteretic and asymmetric phenomenon of shock wave structure was shown based on experimental results.
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Research Products
(11 results)
