摘要
基于船体阻力成因和分类,应用二因次RANS法并结合EFD技术为研究手段,研究了船体各阻力成分和兴波波形,考虑边界层第一层网格高度对数值计算结果的影响,通过数值模拟计算和兴波波形比较,分析表明第一层网格无量纲高度y+值充分影响数值结果精度,总阻力在高傅汝德数下其数值误差有增大趋势,同一航速下摩擦阻力值随y+增加略微增大,剩余阻力值却明显减少,且自由面兴波随傅汝德数增大首部波高愈发明显,船中及尾部区域兴波向外扩散,船首尾肩部开尔文波系明显且波峰后移,其趋势与EFD波形一致,具有实用性。
According to the genesis and classification of the ship resistance, the two-dimensional RANS method together with EFD technology was taken to study each component of ship sailing resistance and wave pattern. The influence of the first layer grid height of the boundary was taken into consideration to study the influence of numerical calculation. With the numerical simulation of the ship resistance and comparison of wave pattern, the results show that the first boundary layer dimensionless height y＋has direct influence on the accuracy of numerical results, the tendency of numerical error of total resistance has increased under high Froude number. When the speed is fixed, the frictional resistance increases slightly with the increase of y＋, but the residual resistance significantly reduces. The wave height in bow increases obviously as the Froude number increases, the wave area of the hull medium and the stern spreads outward, the Kelvin wave can be seen clearly in the shoulder of the ship bow and stern, the peak of wave moves backward with the increase of speed, and the variation tendency of wave pattern is consistent with the EFD method. The method is proved to be appropriate for engineering application.
作者
胡俊明
李铁骊
林焰
徐雪锋
徐利刚
HU Jun-ming;LI Tie-li;LIN Yan;XU Xue-feng;XU Li-gang(School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Dalian 116024, China;Department directly under the Naval Equipment Department, Beijing 100841, China;Office of Represent Stationed in Wuxi area, Wuxi 214061, China)
出处
《船舶力学》
EI
CSCD
北大核心
2018年第5期552-559,共8页
Journal of Ship Mechanics
基金
渔业节能关键技术研究与重大装备开发(201003024)
国防基础科研计划资助项目(A0820132027)
国家自然科学基金(51209034)
中国博士后科学基金特别资助项目(2015T80256)
