近冰面航行潜艇阻力及绕流场分析

目的]采用数值模拟方法探究潜艇近冰面航行时的水动力性能。方法]选取Suboff全附体潜艇模型为研究对象,在STAR-CCM+软件中采用RANS方法,再结合SST k-ω湍流模型和体积分数法计算艇体的水动力性能。然后进行网格无关性验证以及近冰面水动力特性分析的方法验证,以确定计算方法的有效性。结果]结果表明,潜艇近冰面航行时,潜艇的总阻力系数CT在同一弗劳德数下随潜深的增加而减小,在同一潜深下随弗劳德数的增加而减小;在同一弗劳德数下,当无量纲深度大于1.63时,潜深几乎不影响艇体的阻力系数。结论]研究表明,潜艇的总阻力系数受弗劳德数以及潜深的影响较大,随着潜深的增大,潜深对阻力系数的影响将逐渐减小。

Analysis of resistance and flow field of submarine sailing near the ice surface

Objectives]This paper studies the hydrodynamic performance of the submarine sailing near the ice surface using numerical simulation method.Methods]the Suboff full-appended model,RANS method,SST k-ωturbulence model and volume of field method are used to calculate the hydrodynamic performance of the submarine in the STAR-CCM+software.The effectiveness of the calculation method is guaranteed by the method of grid independence verification and the method of hydrodynamics analysis near the ice surface.Results]The results show that when the submarine sails under ice surface,the total resistance coefficient of submarine decreases with the increase of the submergence depth at the same Froude number,and decreases with the increase of Froude number at the same depth.In addition,when the dimensionless depth is greater than 1.63,the submergence hardly affects the drag coefficient.Conclusions]Studies have shown that the total drag coefficient of submarine is greatly influenced by Froude number and submergence depth.With the increase of submergence depth,the influence of submergence depth on drag coefficient decreases gradually.