摘要
为探究艇体对紧急倒车时螺旋桨诱导涡的影响,基于大涡模拟(LES)湍流模型,以Star CCM+为工具,对Sub-off后的E1619桨周围的流场特性进行计算,并对网格和时间步长进行收敛性分析,提高计算结果的可靠性.计算结果表明:上游艇体的存在会明显加剧螺旋桨诱导涡的变形和演化,进而增加其载荷波动程度及载荷平均值,反之,螺旋桨的紧急倒车运转亦会增加艇体阻力的均值和波动;极限载荷工况下桨叶间的流动分离是造成环状涡急剧变形和分离的重要原因.
To find out how the sub affect the induced voetex,this paper based on the large eddy simulation(LES)turbulence model,taking Star CCM+as tool,simulates the characteristics of the flow around the E1619 propeller behind the sub-off body.After that,we conduct the convergence research on grids and time-steps to improve the reliability of solution.The result show that the upstream sub will obviously change development and evolution of the propeller ring-vortex,and increase fluctuations and mean value of the hydrodynamic load,while the reversed propeller will aggravate the fluctuaions and mean value of the resistance of the sub-off.Besides flow separation among the blades is the key point that causes the deformation and separation of the ring-vortex under extreme load cases.
作者
王超
李鹏
王文全
韩阳
WANG Chao;LI Peng;WANG Wenquan;HAN Yang(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China;No.708 Research Institute,China Shipbuilding Industry Corporation,Shanghai 200011,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第7期65-70,共6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(51679052)
装备预研基金资助项目(6142223180210)。
关键词
艇体
紧急倒车
大涡模拟
螺旋桨诱导涡
极限载荷
submarine-body
crashback
large eddy simulation
propeller induced vortex
extreme load
