基于迭代型体积力法的船舶自航性能数值研究

Numerical Prediction of Self-Propulsion Performance with Iterative Body-Force Propeller Model

准确预报船舶自航水动力性能对船舶设计与快速性优化具有重大意义。论文应用计算流体动力学(CFD)方法,采用体积力法代替真实螺旋桨;并应用耦合螺旋桨势流涡格法(VLM)和船体周围粘性流场RANS方程,对KCS集装箱船的自由面粘性流场进行船模自航数值模拟,通过调节螺旋桨转速达到自航状态,计算结果与试验结果吻合良好。整个计算过程通过集成了VLM和RANS方程的程序自动完成。研究结果表明,迭代型体积力法可以快速准确地预报船桨干扰下船体的自航性能。

To achieve quick prediction of self-propulsion performance, an iterative body-force method is applied to simulation of hull/propeller interaction. Viscous flow around a KRISO container ship (KCS) is simulated at the self-propulsion point, while the vortex lattice method (VLM) for propeller’s lifting surface is coupled with the RANS solver. The computation results agree well with the measured data. It is shown that self-propulsion performance can be predicted accurately and efficiently with this method.