DTMB 5415船绕流场数值研究
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摘要
本文以DTMB 5415船为研究对象,应用基于URANS方法的CFD方法进行DTMB 5415船设计状态下船舶绕流场研究,其中湍流模型应用SST模型,自由液面捕捉应用VOF方法;应用CFD方法对船舶阻力性能、自由表面兴波、船舶螺旋桨盘面处的标称伴流场以及尾部轴向速度场等进行数值模拟与分析;将设计状态下DTMB 5415船绕流场数值模拟值与实验值对比,其船舶阻力、自由表面兴波、螺旋桨盘面标称伴流场等的良好吻合证明了网格与数值方法的正确性。本文还对船舶尾部不同截面绕流场边界层厚度以及整船边界层分布进行了研究且与实验值进行了对比。
This paper studies the ship field flow around the ship DTMB 5415 under design condition based on URANS method by using SST model and VOF method for free surface capture. CFD method is applied to numerical simulation and analysis of ship resistance performance, free surface wave, nominal wake field of ship propeller disk and axial velocity field of stern. The comparison and analysis of flow field simulation value and experiment value around ship DTMB 5415 under design condition and the good fit of ship resistance, free surface wave, and nominal wake field prove the validity of the grid and the numerical method. This paper also studies the flow field of boundary layer thickness and distribution and the boundary layer of different cross section around ship and compares it with the experimental value.
This paper studies the ship field flow around the ship DTMB 5415 under design condition based on URANS method by using SST model and VOF method for free surface capture. CFD method is applied to numerical simulation and analysis of ship resistance performance, free surface wave, nominal wake field of ship propeller disk and axial velocity field of stern. The comparison and analysis of flow field simulation value and experiment value around ship DTMB 5415 under design condition and the good fit of ship resistance, free surface wave, and nominal wake field prove the validity of the grid and the numerical method. This paper also studies the flow field of boundary layer thickness and distribution and the boundary layer of different cross section around ship and compares it with the experimental value.
引文
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[2]Ahmed Y,Soares C G.Simulation of free surface flow around a VLCC hull using viscous and potential flow methods[J].Ocean Engineering,2009,36(9).
[3]Zhang Z R.Verification and validation for RANS simulation of KCS container ship without/with propeller[J].Journal of Hydrodynamics Ser B,2010,22(5).
[4]Choi J E,Min K S,Kim J H,et al.Resistance and propulsion characteristics of various commercial ships based on CFD results[J].Ocean Engineering,2010,37(7).
[5]Wilson R V,Carrica P M,Stern F.Unsteady RANS method for ship motions withapplicationtorollforasurfacecombatant[J].Computers&Fluids,2006,35(5).
[6]Ma J,Oberai A A,Hyman M C,et al.Two-fluid modeling of bubbly flows around surface ships using a phenomenological subgrid air entrainment model[J].Computers&Fluids,2011,52.
[7]Wan D C,Shen Z R,Ma J.Numerical simulations of viscous flows around surface ship by level set method[J].Journal of Hydrodynamics,Ser.B,2010,22(5).
[8]王金宝,于海,张越峰,等.低速肥大船舶尾流场数值模拟及阻力性能预报[J].水动力学研究与进展A辑,2010,25(5).
[9]Kim W J,Van S H,Kim D H.Measurement of flows around modern commercial ship models[J].Experiments in Fluids,2001,31(5).
[10]Lee S J,Koh M S,Lee C M.PIV velocity field measurements of flow around a KRISO 3 600 TEU container ship model[J].Journal of Marine Science&Technology,2003,8(2).
[11]Calcagno G,Di F F,Felli M,et al.Propeller Wake Analysis Behind a Ship by Stereo-PIV[C]//Proc.Symp.on Naval Hydrodynamics.2002.
[12]Lee J Y,Bu G P,Sang J L.PIV measurements of hull wake behind a container ship model with varying loading condition[J].Ocean Engineering,2009,3(65).
[13]吴明,王骁,杨波,等.船舶几种浮态下阻力的数值计算方法[J].中国航海,2009,32(3).
[14]Choi J,Yoon S B.Numerical simulations using momentum source wavemaker applied to RANS equation model[J].Coastal Engineering,2009,56(10).
[15]Wilcox D C.Turbulence Modeling for CFD[M].La Can(~)ada,California:DOW Industries,Inc,1994.
[16]覃文洁,胡春光,郭良平,等.近壁面网格尺寸对湍流计算的影响[J].北京理工大学学报,2006(05).