CAJ | 학술논문

本文采用求解RANS方程的方法结合四种湍流模型,对于带有不同附体的SUBOFF模型尾流场进行了数值模拟.数值预报的桨盘面处不同半径上的轴向无量纲速度与试验结果进行了对比,结果表明湍流模型在数值模拟中起到重要作用.潜艇水面航行性能十分重要,因而对于潜艇自由液面绕流的数值模拟备受关注.本文采用VOF方法对于两条潜艇模型在不同傅汝德数下的自由液面绕流进行了数值模拟.计算得到的阻力、波形与试验结果吻合较好.文中也探讨了潜艇自由液面绕流的一般特性.并验证了用CFD手段预报潜艇粘性流场的能力.
본문채용구해RANS방정적방법결합사충단류모형,대우대유불동부체적SUBOFF모형미류장진행료수치모의.수치예보적장반면처불동반경상적축향무량강속도여시험결과진행료대비,결과표명단류모형재수치모의중기도중요작용.잠정수면항행성능십분중요,인이대우잠정자유액면요류적수치모의비수관주.본문채용VOF방법대우량조잠정모형재불동부여덕수하적자유액면요류진행료수치모의.계산득도적조력、파형여시험결과문합교호.문중야탐토료잠정자유액면요류적일반특성.병험증료용CFD수단예보잠정점성류장적능력.
The flow fields of SUBOFF hull with various appendages are numerically simulated by solving RANS equations with four turbulence models.Numerical predictions of the axial velocities for given radii at the propeller plane are compared with experimental data. Comparison shows that turbulence model plays an important role in numerical simulation. The performance of submarine at full surface condition is important. Computational study of free surface flow around submarine is a focus of attention in ship hydrodynamics. In this paper,the numerical simulations of free surface flow around two submarine models at different Froude numbers are carried out with Volume of Fluid (VOF) algorithm which is an interface-capturing method. Computational results including resistances,wave profiles and wave patterns are analyzed and compared with experimental data. The comparison between the prediction and the model test measurement shows fairly good agreement. Some generic features of submarine hydrodynamics with free surface are discussed. The capability of the CFD approach to the prediction of viscous flow of submarine is validated.