| Project/Area Number |
06452350
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
船舶工学
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
MORI Kazu-hiro Hiroshima University, Faculty of Eng.Professor, 工学部, 教授 (90011171)
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| Co-Investigator(Kenkyū-buntansha) |
NINOMIYA Shinji Hiroshima University, Faculty of Eng.Research Associate, 工学部, 助手 (60237774)
DOI Yasuaki Hiroshima University, Faculty of Eng.Associate Professor, 工学部, 助教授 (10134454)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1995: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1994: ¥4,400,000 (Direct Cost: ¥4,400,000)
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| Keywords | Wave making / Submerged wing / lift / Down ward / 抵抗 / 造波抵抗 / 境界要素法 |
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| Research Abstract |
Wave phenomena of a submerged ship with a pare of wings are investigated numerically by making use of the boundary element method. In the simulation, triangular panels are used to represent the general 3-D shape. All the variables are linearly approximated on each panel. The Kutta condition is imposed in all the computational time domain by using a simple iterative procedure. Various computations are performed by changing the aspect ratio of wings and the location to investigate the wave phenomena. Through the investigation, it is found that the wave resistance of the ship can be reduced by a downward lifting force of the wing.
Wave reduction of a ship by wings attached to hull is investigated by Rankine source method. In the simulation, the wing is approximately replaced by a lifting line. For the confirmation of the present computational results, comparative model tests with and without wings are carried out. The agreement between the computation and the experiment confirmed that the wing can be replaced by a lifting line. Various compitations are performed by changing the location, angle of attack and ship speed to investigate the wave phenomena and to analyze the mechanism of the interaction between the main hull and the attached wings. Through these investigation, it is found that the wave resistance of the ship can be reduced by a proper selection of the location and lifting force of the wing. This finding is confirmed through the comparison of wave profile.
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