四桨船舶尾流场特性数值预报研究  

Numerical prediction of wake field for a four-screw ship

作　　者：李想 贾伟 梁宁[2] LI Xiang;JIA Wei;LIANG Ning(School of Marine Science and Engineering,Hainan University,Haikou 570228,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]海南大学海洋科学与工程学院,海口570228 [2]哈尔滨工程大学船舶工程学院,哈尔滨150001

出　　处：《船舶力学》2024年第8期1187-1199,共13页Journal of Ship Mechanics

基　　金：海南省自然科学基金高层次人才项目(520RC543);国家自然科学基金青年基金资助项目(51709040)。

摘　　要：四桨船尾部附体的复杂性及内外桨空间布置位置的差异性会导致内外桨载荷分配不均衡。针对上述问题,本文采用CFD方法对四桨船舶的粘性尾流场进行数值模拟研究,从船体周围流场分布、湍流特性等方面详细分析内外桨盘面伴流场差异产生的原因,并与试验结果进行对比分析。研究结果表明,内桨处于船尾湍流区中,受船体边界层影响更甚,这使得内桨桨盘面轴向速度小于外桨盘面,进而导致内外桨负荷分配不均匀;外桨盘面流动为船体边界层流动及湍流尾流区的混合流动,这使得外桨伴流场更不均匀。上述研究可为四桨船舶设计及尾部布局优化提供基础和支撑。The complexity of the stern appendage of a four-screw ship and the differences in the spatial lay⁃out of the internal and external propellers will lead to the unbalanced load distribution of the internal and ex⁃ternal propellers.Based on the CFD method,numerical prediction simulation for the viscous wake field of a ship with four propellers was carried out.According to wake field distribution and turbulence characteristics,the difference in wake fields between the inner and outer propellers was compared and analyzed,and also the results was contrasted with the test values.The study results show that the inner propeller in the turbulence zone is affected by the hull boundary layer,which makes the axial velocity at the inner propeller disk less than that at the outer propeller disk,resulting in uneven load distribution between the inner and outer propel⁃lers.The flow at the outer propeller is a mixed one of the hull boundary layer and the turbulent wake,which makes the wake at the outer propeller disk more uneven.The research can provide basis and support for four screw ship design and stern layout optimization.

关 键 词：四桨船舶 尾流场 边界层流动 流场均匀度 数值模拟 

分 类 号：U661.1[交通运输工程—船舶及航道工程]