一种数值求解船体兴波阻力的三因次RANS方法（英文）

Numerical Calculation of Hull Wave-making Resistance by Three-dimensional RANS Method

文章根据船体阻力成因和分类提出一种基于三因次RANS求解船体兴波阻力的数值计算方法,与基于势流理论的Rankine源法和EFD法相比较,结果表明此方法得到的兴波阻力数值精度高于Rankine源法,与EFD法吻合较好,形状因子(1+K)值在不同傅汝德数下存在略微差异,船首和两侧的自由面波峰值大于Rankine源法所得值,波谷值却相反,自由面波形变化趋势与Rankine源法吻合一致,随着傅汝德数增加开尔文波系愈发明显且波峰后移,计算方法具有实用性。

According to the cause and classification of hull resistance,a three-dimensional RANS method is proposed to solve hull wave-making resistance.Compared with Rankine source method which is on the basis of potential flow theory,it is turned out that this proposed method is of higher numerical accuracy in solving wave-making resistance,and its result shows good agreement with EFD method.The values of shape factor(1+K)at different Froude numbers are basically the same,with slight deviation.The values of wave crest on the bow and sides are bigger than those obtained by Rankine source method,while the values of wave trough are opposite.Changing tendency of wave profile agrees with that of Rankine source method,and as the increase of Froude number,the Kelvin wave system is becoming more obvious and the wave crest moves backwards.The three-dimensional RANS method is proved to be appropriate for engineering application.