Numerical methods for problems in marine hydrodynamics

海洋流体动力学问题的数值方法

• 批准号: 60302055
• 负责人: MORI Kazu-hiro
• 金额: $ 3.78万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60302055/
• 关键词: Rankine Source Method; Free-Surface Flow; Wedge-Entry; Wave Force; Wave-Breaking; Submerged Foil; Large Eddy Simulation; 剥離流れ; ナビエ・ストークス方程式; 数値シミュレーション; 境界要素法; 定常造波抵抗; 波浪外力; 非線形流体力; 非線形自由表面波; ポーポイズング

In the present project four important marine hydrodynamic problems are studied by numerical methods. An open forum was held by the present investigators and most of the results of the present project are published in its proceedings.Simulations of steady ship wave and caluclations of wave resistance are carried out by the Rankine source method and by a direct simulation method to solve N-S equation.Hydrodynamic forces acting on the offshore structures floating among waves are calculated by a boundary element method and by the singularity method. An entry problem of a wedge-like body is simulated.A grid generation method for the overturning waves is developed. Wave breakings on a submerged hydrofoil are studied.The nonlinear phenomenon of a planing plate is demonstrated.Separated viscous flows behind cylinders and a wing section are studied numerically and experimentally. An attempt is made to simulate the turbulent flow between the parallel plates by the Large-Eddy simulation method.

在本项目中，通过数值方法研究了四个重要的海洋水动力问题。与会研究者举办了一次公开论坛，该项目的大部分成果都发表在其论文集上。通过朗肯源法和直接模拟方法进行了船舶稳态波浪的模拟和波浪阻力的计算，以解决N-S方程。采用边界元法和奇点法计算了漂浮在波浪中的海上结构物的水动力。模拟了楔状体的进入问题。提出了翻转波网格生成方法。研究了水下水翼上的波浪破碎。演示了滑行板的非线性现象。对圆柱体和机翼部分后面的分离粘性流进行了数值和实验研究。尝试用大涡模拟方法来模拟平行板之间的湍流流动。

项目成果

Katuo Suzuki: "Comparison of Calculation Methods for 2-D Free-Surface Flow about Hydro-Foil" Open Forum on Numerical Ship Hydrodynamics. 107-128 (1987)

Katuo Suzuki：“Hydro-Foil 二维自由表面流计算方法的比较”数值船舶流体动力学公开论坛。

Katsuo Suzuki: Proc. of 4th International Conference on Numerical Ship Hydrodynamics. 308-322 (1985)

铃木胜夫：Proc。

沢田 信一: 船舶数値流体力学フォーラム. 29-37 (1987)

Shinichi Sawada：船舶计算流体动力学论坛。29-37 (1987)

経塚 雄策: 第8回海洋工学シンポジウム. 251-258 (1988)

京冢佑作：第八届海洋工程研讨会。251-258（1988）

Yusaku Kyozuka: "Second-order Wave Forces Acting on a Horizontal Circular Cylinder in Irregular Waves" IUTAM Symposiumon Nonlinear Waves. (1987)

Yusaku Kyozuka：“不规则波中作用于水平圆柱体的二阶波浪力”IUTAM 非线性波研讨会。