2013 Fiscal Year Final Research Report
Development of free running simulator using viscous CFD
| Project/Area Number |
24760680
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Naval and maritime engineering
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| Research Institution | National Maritime Research Institute |
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Principal Investigator |
SAKAMOTO Nobuaki 独立行政法人海上技術安全研究所, その他部局等, 主任研究員 (80550003)
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| Research Collaborator |
OHASHI Kunihide (独)海上技術安全研究所, 流体性能評価系, 主任研究員
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 数値流体力学 / 操縦性能推定 |
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| Research Abstract |
Maneuvering simulator is developed based on URaNS solver SURF with moving grid technique. The steering is treated by local grid morphing while the whole computational domain moves for the treatment of ship motions. The code is applied to solve turn zig-zag maneuvers for ESSO OSAKA, then the results are compared with the available sea trial data.
The computational results of turning circle maneuver qualitatively capture the trend of difference between starboard side turning and port side turning. The computational results of 10/10 zig-zag maneuver generally agree well with the sea trial data. Once the steering angle becomes 20/20, the phase lag becomes apparent in yaw angle, rate of turn and drift angle. Two possible reasons for this discrepancy are the lack of rudder area and grid resolution in the rudder/stern vicinity to capture vortices originated from hull and steering motions.
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