湍流模型和网格分布对水下航行体回转水动力数值计算的影响  

Effect of turbulence model and mesh distribution on numerical computation of rotary hydrodynamics of underwater vehicle

作　　者：卢锦国[1] 梁中刚[1] 周轶美[1] 吴方良[1] 

机构地区：[1]中国舰船研究设计中心,武汉430064

出　　处：《计算机辅助工程》2012年第3期17-21,共5页Computer Aided Engineering

摘　　要：针对水下航行体安全操纵设计的关键环节水动力预报,用FLUENT求解不可压缩RANS方程,采用定常旋转运动坐标系,运用相对运动理论和运动叠加原理,计算RNG k-ε,可实现k-ε和SST k-ε等3种湍流模型以及不同网格分布对水下航行体做单平面回转运动所受垂向力和纵倾力矩,并与试验结果比较.结果表明在Re=11.7×106条件下,垂向力和纵倾力矩预报精度较高.该数值预报方法可行、有效,具有较好的工程实用价值.To achieve the hydrodynamics prediction which is the key in safety manipulation design of underwater vehicle, a incompressible RANS equations is solved in FLUENT, and the vertical force and longitudinal moment of underwater vehicle in single-plane rotary motion are calculated under RNG κ-ε, realizable κ-εand SSTκ-εmodels and different mesh distribution and compared with test results. The results indicate that the prediction accuracy of vertical force and longitudinal moment is higher when Re = 11.7 × 10^6. The numerical prediction method is feasible and effective with practical value.

关 键 词：水下航行体 回转运动 水动力 湍流模型 网格分布 FLUENT 

分 类 号：O357.5[理学—流体力学] U661.33[理学—力学]