带球鼻艏方尾型船模阻力的计算研究
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摘要
运用流体分析软件ANSYS-CFX对带球鼻艏的方尾型船模进行数值模拟,计算了弗劳德数在[0.174,0.232]中9个不同航速下的阻力值,并将数值模拟结果与船模实验结果进行对比,结果表明:弗劳德数Fr为0.174时,最大误差为2.15%;弗劳德数Fr为0.232时,最小误差为0.26%,平均误差为0.91%。最后,对各航速下流场、压力场和自由液面进行了对比分析。分析表明:计算流体动力学CFD技术能够模拟船模绕流场,捕捉流场的局部细节和特征,较好地反映船舶的阻力特性。
ANSYS-CFX is used to do numerical simulations of a ship model.The total resistance values of nine different speeds are obtained. Numerical simulation results are compared with experimental data.The results show that the maximum error is 2.15%(Fr=0.174)and the minimum error is 0.26%(Fr=0.232),while the average error is 0.9%.Flow field,pressure field and free surface of different speed are also analyzed.It can be seen that the CFD method can precisely forecast the resistance characteristics of ship model by simulating the viscous flow field and capturing the wave details of the air-water free surface.
ANSYS-CFX is used to do numerical simulations of a ship model.The total resistance values of nine different speeds are obtained. Numerical simulation results are compared with experimental data.The results show that the maximum error is 2.15%(Fr=0.174)and the minimum error is 0.26%(Fr=0.232),while the average error is 0.9%.Flow field,pressure field and free surface of different speed are also analyzed.It can be seen that the CFD method can precisely forecast the resistance characteristics of ship model by simulating the viscous flow field and capturing the wave details of the air-water free surface.
引文
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[2]余建伟.基于CFD的船舶阻力计算与预报研究[D].上海:上海交通大学,2009.
[3]DAWSON C W.Calculations with the XYZ free surface program for five ship models[C]//Proceedings of the Workshop on Ship Wave-Resistance Computations.1979:232-255.
[4]YASUKAWA H.A Rankine Panel Method to Calculate Steady Wave-Making Resistance of a Ship Taking the Effect of Sinkage and Trim into Account[J].西部造船会会報,1993:27-35.
[5]王诗洋,王超,常欣,等.CFD技术在船舶阻力性能预报中的应用[J].武汉理工大学学报,2010,32(21):77-80.
[6]王金宝,蔡荣泉,冯学梅.计及自由面兴波和螺旋桨非定常旋转效应的集装箱船舶绕流场计算研究[J].水动力学研究与进展,2007,22(4):491-500.
[7]于滋广.船舶阻力及流场的数值研究[J].中国水运月刊,2015(10):14-15.
[8]吴乘胜,陈雄,孙立宪,等.静水中自由船模拖曳CFD模拟方法研究[J].船舶力学,2010,14(8):823-833.
[9]杨怡君.船模的阻力计算和实验测定[D].杭州:杭州电子科技大学,2015.