A Fundamental Study on the Clarification and Control of Supersonic Boundary Layer Transition
| Project/Area Number |
19560788
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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 |
Aerospace engineering
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
SAKAUE Shoji Osaka Prefecture University, 工学研究科, 助教 (70244655)
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| Co-Investigator(Kenkyū-buntansha) |
ARAI Takakage 大阪府立大学, 工学研究科, 教授 (10175945)
西岡 通男 大阪府立大学, 工学研究科, 客員研究員 (60081444)
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIOKA Michio 大阪府立大学, 工学研究科, 客員研究員 (60081444)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 航空宇宙工学 / 流体工学 / 超音速境界層 / 乱流遷移 / 乱流制御 / 定量化シュリーレン法 / 低速ストリーク / 縦渦 |
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| Research Abstract |
In order to clarify the mechanism for supersonic boundary layer transition, we examine a supersonic boundary layer along a small tunnel nozzle wall with rectangular cross section using calibrated quantitative schlieren optical system, Pitot-tube, hot-wire and DNS with focusing efforts on finding non-linear disturbances governing the transition. The results clearly show that the transition examined in this study is the same as the subsonic case initially governed by low-speed streaks and streamwise vortices which can lead to the formation of turbulent spots. Also, we obtain useful numerical data and knowledge on the supersonic boundary layer transition, such as transition Reynolds number which is important not only for the transition prediction but for the laminar flow control.
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Report
(4 results)
Research Products
(43 results)
