翼付き半没型高速船周りの流れと6自由度運動の数値シミュレーション

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Flow fields and motions of the semi-submergible high-speed ship with wings (HSV) are studied by numerical simulations. Computations of lifting force and resistance are carried out together with the flow fields by the boundary element method for various cases where the submergence depth, the position of wing and the angle of attack are systematically changed. It is confirmed that the depth of submergence is important both for the resistance and lifting force. It is a well-known fact that the shallower submergence depth requires more resistance, but it may be an important finding that the lifting force is larger when the submergence depth is less. This nature is beneficial for HSV for which much lifting force is required during its shallower submergence. On the other hand, the position of the wing affects little on them. The resistance remains unchanged even if the attack angle is changed. Non-zero attack angle of the main wing can be designed to reduce the frictional resistance. The motion of HSV is numerically simulated by solving the motion equation. All the forces including the the damping force are provided by experiments or simple estimation. The cases with and without control are compared under various situations to conclude that the control is essential for any cases, although it is a primitive PD method,. It is also found that the negative dihedral angle of the main wing is not so effective to control the rolling motion as expected. It is concluded that such simulations of flow fields or motions of unexperienced vehicles like HSV are very useful when they are carried out in advance to the experiments.
社団法人日本船舶海洋工学会の論文
1991-09-04

翼付き半没型高速船周りの流れと6自由度運動の数値シミュレーション

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