基于滑移网格与RNG k-ε湍流模型的桨舵干扰性能研究

Research on the hydrodynamics performance of propeller-rudder interaction based on sliding mesh and RNG k-ε model

结合RNG k-ε湍流模型,运用滑移网格技术对粘性流场中桨舵相互干扰引起的三维非定常湍流进行了计算,得到了随进速系数的变化,桨舵之间相互干扰性能的变化规律;同时获得了桨舵干扰性能随桨舵之间的距离的改变而相应的变化规律。文中给出了桨舵干扰水动力性能的计算结果,并与试验测量值作了比较。从对计算结果的分析可知,利用滑移网格技术及RNG k-ε湍流模型,可以较好地模拟桨舵干扰的水动力性能问题。同时文中分析了桨舵表面压强分布规律以及舵的存在对螺旋桨尾流场的影响。

The sliding mesh technique and RNG k-ε turbulence model were used to calculate the hydrodynamic performance of propeller-rudder interaction in the viscous flow region.The changing law of propeller-rudder interaction followed with the change of advance coefficient and the distance between the propeller and the rudder was calculated.The computed result of hydrodynamics performance of propeller-rudder interaction was given in this paper,which was also compared with the experimental data.Based on the comparisons,it shows that the sliding mesh technique and RNG k-ε turbulent model can be used to predict the hydrodynamic performance of propeller-rudder interaction.At the same time,the pressure distribution of propeller and rubber and the change of propeller wake field because of rubber existing were analyzed.