基于重叠网格的规则波中船舶运动数值预报方法
|
摘要
基于RANS方法及VOF造波技术,构建了数值波浪水池,以DTMB 5512船模为研究对象,应用重叠网格技术及SST k-ω湍流模型,实现了不同顶浪条件下船模运动及粘性流场的数值模拟,对比试验结果表明,该方法能够较为准确预报绝大部分工况下的船模运动响应,满足工程设计需要,可为船舶水动力性能分析及运动预报提供技术支撑,但在高航速下应用该方法所得的船舶运动响应结果偏差较大,尚需针对湍流模型及自由液面捕捉技术进一步优化。
The numerical wave tank was established based on the RANS equations and VOF method. CFD simulations have been carried out for the motion of the ship model DTMB 5512. An overset mesh approach and the SST k-ω turbulence model were utilized to obtain the motion parameters and viscous flow field of the ship model in head waves. Comparison of numerical results and the experimental ones shows fair agreement in the vast majority conditions,which indicates that proposed method is feasible and powerful for estimating the hydrodynamic performance and motion characteristic forecasting. Corresponding optimizing work may be carried out in numerical method,including turbulence model and free-surface capture technology,to improve forecast accuracy in high-speed cases.
The numerical wave tank was established based on the RANS equations and VOF method. CFD simulations have been carried out for the motion of the ship model DTMB 5512. An overset mesh approach and the SST k-ω turbulence model were utilized to obtain the motion parameters and viscous flow field of the ship model in head waves. Comparison of numerical results and the experimental ones shows fair agreement in the vast majority conditions,which indicates that proposed method is feasible and powerful for estimating the hydrodynamic performance and motion characteristic forecasting. Corresponding optimizing work may be carried out in numerical method,including turbulence model and free-surface capture technology,to improve forecast accuracy in high-speed cases.
引文
[1] CARRICA P M,WILSON R V,NOACK R W,et al. Ship motions using single-phase level set with dynamic overset grids[J]. Computers&Fluids,2007,36:1415-1433.
[2] SIMONSEN C D,OTZEN J F,JONCQUEZ S,et al. EFD and CFD for KCS heaving and pitching in regular head waves[J]. Journal of Marine Science and Technology,2013,18:435-459.
[3] TEZDOGAN T,DEMIREL Y K,KELLETT P,et al. Fullscale unsteady RANS CFD simulations of ship behaviour and performance in head seas due to slow steaming[J].Ocean Engineering,2015,97:180-206.
[4] MOUSAVIRAAD S M,CARRICA P M,STERN F. Development and validation of harmonic wave group single-run produre for RAO with comparison to regular wave and transient wave group[J]. Ocean Engineering,2010,37:653-666.
[5]沈志荣,叶海轩,万德成.船舶在迎浪中运动响应和波浪增阻的RANS数值模拟[J].水动力学研究与进展,2012,27(6):612-633.
[6]吴乘胜,朱德祥,缪国平.数值波浪水池中舰船顶浪运动模拟研究[J].船舶力学,2008,12(5):692-696.
[7]王硕,苏玉民,杜欣.滑行艇静水直航及波浪中运动的数值模拟[J].华南理工大学学报(自然科学版),2013,41(4):119-126.
[8]马山,葛文澎,段文洋,等.基于重叠网格的C11集装箱船自由衰减横摇模拟[J].华中科技大学学报(自然科学版),2017,45(5):34-39.
[9]蒋银,朱仁传,缪国平,等.粘性流中带舭龙骨船体横摇模拟及阻力分析预报[J].中国造船,2016,57(2):1-12.
[10] LARSSON L,RAVEN H. Ship resistance and flow[M].New York:Society of Naval Architects and Marine Engineering,2010.
[11] COLAGROSSI A,LUGNI C,LANDRINI M,et al. Numerical and experimental transient tests for ship seakeeping[J]. International Journal of Offshore and Polar Engineering,2001,11(3):184-190.
[2] SIMONSEN C D,OTZEN J F,JONCQUEZ S,et al. EFD and CFD for KCS heaving and pitching in regular head waves[J]. Journal of Marine Science and Technology,2013,18:435-459.
[3] TEZDOGAN T,DEMIREL Y K,KELLETT P,et al. Fullscale unsteady RANS CFD simulations of ship behaviour and performance in head seas due to slow steaming[J].Ocean Engineering,2015,97:180-206.
[4] MOUSAVIRAAD S M,CARRICA P M,STERN F. Development and validation of harmonic wave group single-run produre for RAO with comparison to regular wave and transient wave group[J]. Ocean Engineering,2010,37:653-666.
[5]沈志荣,叶海轩,万德成.船舶在迎浪中运动响应和波浪增阻的RANS数值模拟[J].水动力学研究与进展,2012,27(6):612-633.
[6]吴乘胜,朱德祥,缪国平.数值波浪水池中舰船顶浪运动模拟研究[J].船舶力学,2008,12(5):692-696.
[7]王硕,苏玉民,杜欣.滑行艇静水直航及波浪中运动的数值模拟[J].华南理工大学学报(自然科学版),2013,41(4):119-126.
[8]马山,葛文澎,段文洋,等.基于重叠网格的C11集装箱船自由衰减横摇模拟[J].华中科技大学学报(自然科学版),2017,45(5):34-39.
[9]蒋银,朱仁传,缪国平,等.粘性流中带舭龙骨船体横摇模拟及阻力分析预报[J].中国造船,2016,57(2):1-12.
[10] LARSSON L,RAVEN H. Ship resistance and flow[M].New York:Society of Naval Architects and Marine Engineering,2010.
[11] COLAGROSSI A,LUGNI C,LANDRINI M,et al. Numerical and experimental transient tests for ship seakeeping[J]. International Journal of Offshore and Polar Engineering,2001,11(3):184-190.