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| 1 | Development of naoe-FOAM-SJTU solver based on OpenFOAM for marine hydrodynamics显示文摘A CFD solver naoe-FOAM-SJTU (The abbreviation naoe stands for naval architecture and ocean engineering) is developed based on the open source platform OpenFOAM with the purpose of simulating various marine hydrodynamic problems.In the present paper,self-developed modules,i.e.,wave generation and absorption,6 degrees of freedom motion,mooring system,dynamic overset grid,fluid-structure interaction,unsteady actuator line model,implemented on the open source platform OpenFOAM are introduced to illustrate the development of the marine hydrodynamics CFD solver.Furthermore,extensive simulations of marine hydrodynamic problems using the developed modules are conducted and validated by available experimental data.It has been proved that the CFD solver naoe-FOAM-SJTU is suitable and reliable in predicting the complex viscous flow around ship and offshore structures.Efficiency and accuracy need to be focused in the future development of the present CFD solver. | Jian-hua Wang Wei-wen Zhao De-cheng Wan | 2019 | Journal of Hydrodynamics2019，31，1： | 14 |
| 2 | CFD Investigations of Ship Maneuvering in Waves Using naoe-FOAM-SJTU Solver显示文摘Ship maneuvering in waves includes the performance of ship resistance, seakeeping, propulsion, and maneuverability. It is a complex hydrodynamic problem with the interaction of many factors. With the purpose of directly predicting the behavior of ship maneuvering in waves, a CFD solver named naoe-FOAM-SJTU is developed by the Computational Marine Hydrodynamics Lab(CMHL) in Shanghai Jiao Tong University. The solver is based on open source platform OpenFOAM and has introduced dynamic overset grid technology to handle complex ship hull-propeller-rudder motion system. Maneuvering control module based on feedback control mechanism is also developed to accurately simulate corresponding motion behavior of free running ship maneuver. Inlet boundary wavemaker and relaxation zone technique is used to generate desired waves. Based on the developed modules, unsteady Reynolds-averaged Navier-Stokes(RANS) computations are carried out for several validation cases of free running ship maneuver in waves including zigzag, turning circle, and course keeping maneuvers. The simulation results are compared with available benchmark data. Ship motions, trajectories, and other maneuvering parameters are consistent with available experimental data, which indicate that the present solver can be suitable and reliable in predicting the performance of ship maneuvering in waves. Flow visualizations, such as free surface elevation, wake flow, vortical structures, are presented to explain the hydrodynamic performance of ship maneuvering in waves. Large flow separation can be observed around propellers and rudders. It is concluded that RANS approach is not accurate enough for predicting ship maneuvering in waves with large flow separations and detached eddy simulation(DES) or large eddy simulation(LES) computations are required to improve the prediction accuracy. | Jianhua Wang Decheng Wan | 2018 | Journal of Marine Science and Application2018，17，3： | 12 |
| 3 | 波浪中KVLCC2运动与阻力增加的CFD计算及分析显示文摘为研究肥大型船舶在波浪中的运动与增阻问题,基于计算流体动力学(computational fluid dynamics,CFD)理论建立了数值波浪水池,并结合重叠网格方法对KVLCC2迎浪航行进行了模拟研究。文中计算了Fn=0.142时KVLCC2船模在不同频率遭遇波作用下的运动和阻力,采用傅里叶级数展开法分析获得垂荡、纵摇运动响应和阻力值,将船模在波浪中航行受到的阻力减去静水航行阻力,获得了不同频率下的阻力增加值,将运动与阻力增加值与相关实验结果比较,吻合良好。通过对Fn=0.142时KVLCC2在波浪增阻成分进行的分析,与相关势流理论计算结果及实验结果对比,研究表明:短波增阻主要由船体绕射贡献,同时表明CFD方法计算船舶在波浪上的运动和增阻的可靠性。 | 曹阳 朱仁传 蒋银 洪亮 | 2017 | 哈尔滨工程大学学报2017，38，12： | 12 |
| 4 | 南海浮式码头与系泊系统动力耦合分析显示文摘南海部分海域由于海底地形限制,运输船舶无法正常靠泊作业,可采用成本较低的浮式码头供运输船舶停泊使用。该文应用基于开源平台Open FOAM开发的船舶与海洋工程CFD求解器―naoe-FOAM-SJTU,对一座分布式系泊系统的浮式码头在入射波浪作用下的运动响应进行了数值模拟。文中系泊系统的求解采用基于集中质量法的动力分析方法,给出了码头运动和系泊系统所受动力的时历曲线,并且将结果同静力分析进行对比,验证了采用动力分析方法的可靠性和必要性。 | 王建华 万德成 | 2015 | 水动力学研究与进展(A辑)2015，30，2： | 12 |
| 5 | 基于水动力性能优化的船型设计研究进展显示文摘随着计算机技术的飞速发展,基于性能仿真的船型设计在我国船舶行业得到广泛重视和大力发展。船型优化设计主要包括了船型变换、水动力性能评估、近似模型以及优化算法等模块。该文介绍了近二十几年来基于水动力性能优化的船型设计研究进展,对目前各模块所运用的理论方法分别进行了归纳和总结。根据目前该领域所需的关键技术以及面临的难点,详细介绍了上海交通大学船海工程计算水动力学研究中心(CMHL)在船型优化领域所做的工作。 | 万德成 缪爱琴 赵敏 | 2019 | 水动力学研究与进展(A辑)2019，34，6： | 11 |
| 6 | 豪华邮轮多航速兴波阻力的船型优化显示文摘[目的]豪华邮轮的型线优化设计,除了要考虑美学视角因素,更重要的是还要考虑在整个航行阶段都能满足绿色节能、安全舒适等方面的要求,其中针对多航速船舶阻力性能优化进行豪华邮轮的船型设计尤为重要。[方法]首先,基于自主开发的船型优化设计软件OPTShip-SJTU,以某豪华邮轮为原始船型,通过自由变形方法,对船艏、水线、船艉等位置进行局部变形;然后,通过基于Neumann-Michell(NM)势流理论的兴波阻力求解器NMShip-SJTU进行阻力评估,并结合优化算法得到不同航速下兴波阻力系数最优的船型;最后,采用经过广泛验证的高精度黏流求解器naoe-FOAM-SJTU对优化船型做进一步验证。[结果]结果显示,基于NM势流理论的兴波阻力优化可以得到多航速下总阻力性能更优的船型,相比基于黏流CFD评估进行优化,更高效,且得到的优化船型在2个航速下总阻力分别降低了0.65%和0.98%。[结论]研究表明,基于数值模拟的船型优化设计流程可以应用于豪华邮轮的阻力性能优化。 | 刘鑫旺 万德成 | 2020 | 中国舰船研究2020，15，5： | 9 |
| 7 | Numerical Study of Viscous Wave-Making Resistance of Ship Navigation in Still Water显示文摘一个轮船鈥檚 电阻的预言特别粘滞做波浪的抵抗是在 CFD 应用的一个重要问题。在这份报纸,从到与在静止的水里进展的不同的壳形式的壳 6 的壳 1 的六艘轮船的电阻数字地用解答者 naoe-FOAM-SJTU 被学习,它基于开放源代码代码包裹 OpenFOAM 被开发。当认为二是速度条件(12 kn 和 16 kn ) 时,电阻的不同部件被计算并且比较。壳 3 的抵抗是最小当壳 5 的在一样是最大的时,加速。结果证明壳 3 是为类似的轮船的设计的一本好参考书,它能为壳形式优化提供一些珍贵指南。 | Ruosi Zha Haixuan Ye Zhirong Shen Decheng Wan | 2014 | Journal of Marine Science and Application2014，13，2： | 4 |
| 8 | Numerical techniques for coupling hydrodynamic problems in ship and ocean engineering显示文摘Most hydrodynamic problems in ship and ocean engineering are complex and highly coupled.Under the trend of intelligent and digital design for ships and ocean engineering structures,comprehensive performance evaluation and optimization are of vital importance during design.In this process,various coupling effects need to be accurately predicted.With the significant progress of computational fluid dynamics(CFD),many advanced numerical models were proposed to simulate the complex coupling hydrodynamic problems in ship and ocean engineering field.In this paper,five key coupling hydrodynamic problems are introduced,which are hull-propeller-rudder coupling,wave-floating structure coupling,aerodynamic-hydrodynamic coupling,fluid structure coupling and fluid-noise coupling,respectively.The paper focuses on the numerical simulation techniques corresponding to each coupling problem,including the theories and the applications.Future directions and conclusions are provided finally. | Xiao-song Zhang Jian-hua Wang De-cheng Wan | 2020 | Journal of Hydrodynamics2020，32，2： | 3 |
| 9 | Numerical computations of resistance of high speed catamaran in calm water显示文摘In this paper, the in-house multifunction solver naoe-FOAM-SJTU is applied to study the resistance and wave-making performance of a high-speed catamaran sailing at different velocity in calm water. The volume of fluid(VOF) method is used to capture the free interface and the finite volume method(FVM) is adopted as the discretization scheme. The hull model is fixed with initial trim and sinkage. The numerical results of the presented paper agree very well with the measurement data of model test. Wave making and vortex field are well simulated to analyze the hydrodynamic performance of a catamaran. | 查若思 叶海轩 沈志荣 万德成 | 2014 | Journal of Hydrodynamics2014，26，6： | 3 |
| 10 | 不同波长下KCS船运动响应与波浪增阻数值研究显示文摘准确预报船舶在波浪中的运动和力可以为船舶性能评估提供参考。采用naoe-FOAM-SJTU求解器,数值模拟固定和放开垂荡、纵摇自由度的KCS船在不同波长的迎浪规则波中的运动。首先运用数值造波方法生成不同波浪周期的Stokes一阶深水规则波,与Stokes波的理论值对比确保造波的准确性;然后计算固定或放开垂荡和纵摇自由度的KCS船在0.65≤λ/L(波长/船长)≤1.95的遭遇波中的运动和阻力,研究KCS船的波浪增阻中绕射和辐射成分,且采用傅里叶分析法研究了运动与阻力的线性和非线性成分分布。结果表明,波浪绕射增阻受波长的影响不大,当波长接近船长时,船舶的垂荡和纵摇幅值以及波浪增阻均达到峰值,这主要由船体剧烈运动引起的辐射增阻导致,应避免船舶在此工况下航行。 | 郭浩 王建华 万德成 | 2020 | 海洋工程2020，38，6： | 3 |
| 11 | Ship bow waves显示文摘The bow wave generated by a ship hull that advances at constant speed in calm water is considered. The bow wave only depends on the shape of the ship bow (not on the hull geometry aft of the bow wave). This basic property makes it possible to determine the bow waves generated by a canonical family of ship bows defined in terms of relatively few parameters. Fast ships with fine bows generate overturning bow waves that consist of detached thin sheets of water, which are mostly steady until they hit the main free surface and undergo turbulent breaking up and diffusion. However, slow ships with blunt bows create highly unsteady and turbulent breaking bow waves. These two alternative flow regimes are due to a nonlinear constraint related to the Bernoulli relation at the free surface. Recent results about the overturning and breaking bow wave regimes, and the boundary that divides these two basic flow regimes, are reviewed. Questions and conjectures about the energy of breaking ship bow waves, and free-surface effects on flow circulation, are also noted. | NOBLESSE Francis DELHOMMEAU Gerard LIU Hua WAN De-cheng YANG Chi | 2013 | Journal of Hydrodynamics2013，25，4： | 2 |
| 12 | 穿浪双体船迎浪纵向运动和阻力增值数值分析显示文摘针对穿浪双体船(WPC)航速高、航行姿态变化显著,传统方法难以准确预报其耐波性的现状,采用RANS方程及VOF算法模拟了船体兴波自由面,使用Overset技术实现了船体运动区域与周围流域物理量的插值求解,建立了穿浪双体船在波浪中运动及阻力增值计算方法,并通过计算结果与模型试验数据及切片法计算结果的对比发现,该方法较切片法预报精度显著提高,从而验证了该方法的有效性。数值计算结果还表明:该船波浪中的运动是以静水航行姿态为平衡位置的摇荡运动;不同波长时,阻力增值中摩擦阻力与压差阻力的贡献有所变化,在短波中(λ/L≤1.4),58.9%≤ΔRf/ΔRt≤72.4%,在长波中(λ/L>1.4),59.9%≤ΔRp/ΔRt≤70.0%。 | 徐野 董文才 姚朝帮 | 2016 | 海军工程大学学报2016，28，1： | 1 |
| 13 | Numerical Investigation on Two-dimensional Boundary Layer Flow with Transition显示文摘作为在许多设计应用程序的一个基本问题,到骚乱的从 laminar 的转变在计算液体动力学(CFD ) 仍然是一个困难的问题。一过渡流动在的数字研究二维被雷纳兹进行在这份报纸的平均数字模拟(RANS ) 。骚乱模型戏在复杂流动模拟的一个重要角色,和四个先进骚乱模型被评估。摩擦抵抗系数的数字答案与在过渡地区的测量那个相比,它显示有修正的那个威尔科克斯(2006 )k- 模型是最好的候选人。平均无尺寸的速度介绍的 streamwise 的无尺寸的速度表演的数字、分析的解决方案的比较在过渡区域很快改正形状。而且,象骚乱动能,旋涡粘性,和雷纳兹应力那样的骚乱数量也被学习,它是有用的学习转变行为。 | Yong Zhao Tianlin Wang Zhi Zong | 2014 | Journal of Marine Science and Application2014，13，4： | 0 |
| 14 | 基于重叠网格方法的船舶迎浪增阻与运动数值预报显示文摘基于粘性流CFD软件建立了三维数值波浪水池,并对带舵的KCS船模在静水和5个不同波长的规则波中航行进行数值模拟。文中采用入口处模拟波速的方法造波,消波方法运用强迫消波技术(Wave Forcing),并利用VOF方法追踪自由波面的变化,在数值水池中成功模拟了波浪的生成与传播;最后结合重叠网格方法对KCS船模迎浪增阻与运动响应进行数值计算,并将计算结果与试验数据进行对比分析,吻合良好,为今后准确预报舰船在波浪中的增阻和运动响应提供参考。 | 李冬琴 李国焕 戴晶晶 章易立 李鹏 | 2018 | 舰船科学技术2018，40，11： | 0 |
| 15 | 应用重叠网格方法的单点系泊FPSO数值模拟显示文摘浮式生产储油装置系统在深海油气的开发与存储中有着重要应用.其中,FPSO的风标效应以及多浮体旁靠成为值得研究的内容.为了更好地研究FPSO的风标效应及旁靠问题,文中将锚链系统写入了重叠网格模块中.利用基于开源平台Open FOAM开发的具有重叠网格模块的船舶与海洋工程水动力CFD求解器——naoe-FOAM-SJTU,对带有锚链的单点系泊FPSO的运动响应进行模拟和分析,以验证锚链系统在重叠网格模块中的可靠性.文中对只放开一个自由度的带锚链的FPSO进行垂荡衰减运动模拟,并与模型试验进行对比,以验证数值模拟的可行性和可靠性.计算分析的结果验证了利用CFD技术和重叠网格方法对带有锚链的FPSO运动的有效性,同时分析了锚链受力情况. | 庄园 万德成 | 2017 | 江苏科技大学学报(自然科学版)2017，31，5： | 0 |
| 16 | 基于RANS/LES混合方法的近岸水域波浪增阻影响的数值模拟显示文摘分析船舶在近岸水域航行时所受波浪增阻大小的影响因素,以寻求降低波浪增阻的方法。基于近岸水域中船舶阻力理论,采用雷诺平均(RANS)和大涡模拟(LES)相结合的方法进行数值求解,并运用两相流方法和造波消波技术建立数值水池模型。用Fluent求解器对船舶在不同工况下的波浪增阻进行数值模拟。试验结果表明:用该方法对近岸水域航行的船舶进行波浪增阻的数值模拟可有效提高计算机运算效率,在粗糙网格层面上得到的计算结果精度良好;船舶在近岸水域中航行时的波浪增阻随波高的增加而增加,并且与船体湿润面积呈正相关;船舶在近岸水域以中低速航行时所受波浪增阻随弗劳德数的增加而增加。该研究为近岸水域通航船舶减小航行阻力提供了可行的方法与思路。 | 黄鑫伟 程志友 胡健 胡成 | 2023 | 船舶工程2023，45，1： | 0 |
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