摘要
利用开源计算流体力学软件包OpenFOAM对不同集装箱布置形式下四种集装箱船的风载荷进行了数值模拟计算.四种布置形式为:非满载下集装箱沿船长均匀布置及两端集中布置;满载下有间隙布置及无间隙布置.采用势流方法与黏流方法相结合的计算策略:首先视流体为势流得到流场的速度势及速度分布,然后将所得速度场值作为初始场值赋给有黏流场,应用Spalart-Allmaras湍流模型进行数值模拟计算得到最终结果.此外,对比日本船级社推荐使用的集装箱船风载荷计算公式.结果表明:风载荷的力系数及力矩系数不随雷诺数的变化而改变;非满载情况下将集装箱集中在艏艉两端布置可以有效减小船舶所受的风阻力;满载情况下尽量减小集装箱间的间隙也有利于减小风阻力.
Wind loads of four container ships with different layouts were simulated numerically by the open source computational fluid dynamics software package OpenFOAM. There are four kinds of the layouts, under non-fully loads, containers evenly arranged along the ship＇s longitudinal direction and ones placed at both ends of the ship, and under fully loads, arrangements with gaps and without gaps between the containers. A computing strategy combining the viscous flow method with potential flow method was used. Taking the field as a potential flow, the velocity potential and velocity distribution were obtained. Then the velocity distribution was assigned to the viscous flow field as an initial field value and the final numerical simulation results were obtained using the Spalart-Allmaras turbulence model. In addition, these simulated results were compared with the wind loads calculation formula of container ships recommended by Nippon Kaiji Kyokai. Results show that the force and torque coefficients of the wind loads do not change as the Reynolds number changes. The layout form of containers placed at both ends at non-fully loaded condition can effectively reduce the wind resistance and the wind resistance can be reduced by minimizing the gaps between the containers under fully loaded condition.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第10期95-99,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51079032)
黑龙江省杰出青年科学基金资助项目(200908)
关键词
船舶
湍流模型
计算流体力学
集装箱
风载荷
布置形式
ships
turbulence models
computational fluid dynamics
containers
wind loads
Spalart-Allmaras
layouts
