| Project/Area Number |
23360381
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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 | 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 |
SUNADA Shigeru 大阪府立大学, 工学(系)研究科(研究院), 教授 (70343415)
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| Co-Investigator(Kenkyū-buntansha) |
YONEZAWA Koichi 大阪大学, 基礎工学研究科, 助教 (00362640)
ISHIDA Ryohei 大阪府立大学, 大学院・工学研究科, 准教授 (30145817)
NONAKA Satoshi 宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (40332150)
HASHIMOTO Atsushi 宇宙航空研究開発機構, 航空本部, 研究員 (30462899)
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| Co-Investigator(Renkei-kenkyūsha) |
SAKAUE Shoji 大阪府立大学, 大学院・工学研究科, 助教 (70244655)
ASAI Keisuke 東北大学, 大学院・工学研究科, 教授 (40358669)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2011: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Keywords | 火星飛行機 / プロペラ / 低レイノルズ数 / 高マッハ数 / 前縁渦 / 前縁剥離渦 |
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| Research Abstract |
In oreder to develop a propeller of a Mars airplane, the characteristics of a propeller operating at a Reynolds number with the order of 1000 and a high Mach number (Mach number at tip is about 0.5) were investigated by experiments at three wind tunnels and CFD analysis. The followings have been made clear. (1) A method used for designing a propeller at a high Reynolds number, that is a method proposed by Adkins and Liebeck, is available at the present Reynolds number. (2) We proposed an airfoil shape with a high maximum lift-drag ratio. (3) An effect of compressibility on the charactericts of an airfoil is smaller with the decrease of Reynolds number. (4) Aspect ratio of a blade is smaller with the decrease of Reynolds number.(5) There is possibility that characteristics of a propller can be improved by the variations of a sweepback angle and a dihedral angle. This is because position of vortices on the upper surface is affected by the variations of these angles.
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