Computational Fluid Dynamics Research on The Flow Field around A Ship Hull Considering The Free Surface Effect.

考虑自由表面效应的船体周围流场的计算流体动力学研究。

• 批准号: 03452194
• 负责人: IKEHATA Mitsuhisa
• 金额: $ 3.78万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452194/
• 关键词: Navier-Stoker equation; Finite difference method; Free surface effect; High Reynolds no. viscous flow; Computational Fluid Dynamics; Boundary layer and wake; NS solver; ナビエ・スト-クス方程式

A new NS solver has been developed employing the finite difference method and the pseudo - compressibility technique. First of all, three basic equations are described in the same form so as to solve the same algorithm. The grid generation is pursued by a new algebraic method hinted by the bending beam theory. This method makes the grid generation fitting the boundary of the free surface, the geometrical shape of which continues to change at each time step until the convergence to the steady state. The first application of this NS solver has been done to the 2D problem of a submerged hydrofoil under the free surface. The good results have been obtained concerning to the generated waves on the free surface and lift and drag. Secondly the new NS solver has been applied to the junction flow about the wing strut standing on the flat plate. The limitting streamlines and the pressure distribution in the junction part of the strut and the flat plate have been good simulated. lastly it has been applied to the flow field around the ship advancing with a constant speed on the free surface. The computed results of Series 60 (C = 0.60) and HSVA tanker models have shown good agreement with experimented data. We may expect that this new NS solver will be improved to be able to predict the flow around a full scale ship in the near future.

采用有限差分法和拟压缩性技术，发展了一种新的NS求解器.首先，将三个基本方程以相同的形式描述，以便用相同的算法求解。网格的生成采用了一种新的代数方法，该方法由弯曲梁理论所暗示。该方法使网格生成拟合自由表面的边界，自由表面的几何形状在每个时间步不断变化，直到收敛到稳态。该NS解算器的第一个应用已经完成的二维问题的水下水翼下的自由表面。计算结果表明，在自由面上的波浪和升力、阻力等方面都取得了较好的效果。其次，将新的NS解应用于平板上机翼支杆的连接流动。得到了压杆与平板连接处的极限流线和压力分布。最后将其应用于船舶在自由水面上匀速前进时的绕流场。Series60（C = 0.60）和HSVA油轮模型的计算结果与实验数据吻合较好。我们可以预期，这种新的NS求解器将得到改进，能够预测在不久的将来，全尺寸的船舶周围的流动。

项目成果

池畑 光尚,劉 浩: "横傾斜と迎角のある場合のシャフトブラケットと平板とのジャンクションフロー計算" 日本造船研究協会第213研究部会平成4年度報告書. (1993)

Mitsunao Ikebata、Hiroshi Liu：“侧倾和攻角情况下轴支架与平板之间的连接流计算”日本造船研究会第213次研究组1992年报告（1993年）。

H.Liu,M.IKeHata: "Numerical Simulation of Free Surtace Viscous Flow arouns A Prabtical Ship Model" Journal of Ship Researoh. (1993)

H.Liu，M.IKEHata：“实用船舶模型周围自由表面粘性流的数值模拟”船舶研究杂志。

H.Liu,M.IKeHata: "Computaion of Free Surface Waves arund An Arbitrary Boby by A NS Solver Usinh the Pseudo-Compressibity Techique" International Journal of Numerical Methods in Fluids. (1993)

H.Liu，M.IKeHata：“使用伪压缩技术通过 NS 求解器计算自由表面波和任意物体”国际流体数值方法杂志。

H.Liu M.Ikehata: "Computation of Free Surface Waves around An Arbitrary Body by A NS Solver Using the Pseudo-Compressibility Technique" International Journal of Numerical Methods in Fluids. (1993)

H.Liu M.Ikehata：“使用伪压缩性技术通过 NS 解算器计算任意物体周围的自由表面波”国际流体数值方法杂志。

H.Liu M.Ikehata: "Numerical Simulation of Free Surface Viscous Flow around A Practical Ship Model" Journal of Ship Research. (1993)

H.Liu M.Ikehata：“实用船舶模型周围自由表面粘性流的数值模拟”船舶研究杂志。