粘流中舟艇水阻力与自由面流场的数值计算

Numerical calculation of the resistance and flow field about light boat under viscous flows

基于粘流理论研究了舟艇的水阻力与自由面流场。数值计算中,控制方程为完整的N-S方程,并采用k-ε两方程湍流模型封闭雷诺方程,对自由表面的追踪采用VOF方法。为验证本方法的正确性,以系列60船模进行了考核,得到了不同航速下的船体水阻力、自由面流场和相应的粘性阻力系数。并把计算结果与已发表的试验结论及其他计算结果做了比较,结果表明,本文的计算方法是可信的。

The two-equation κ-ε turbulent model and Reynolds equation were used to simulate the resistance and free surface flow around light boat under viscous flows. In order to track the free surface,the volume-of-fluid（VOF） method was employed. Series 60 model was used to examine this computation. The numerical results of total water-drags, viscous water-drags, flow field and the corresponding viscous resistance coefficient at different velocity were obtained. Compared with experiment date and other computation,the result shows that this computation method has the advantage of high accuracy for engineering purpose. The work in the paper is to be modefied in the forthcoming future.