三维球鼻艏入水砰击研究

基于有限体积法的数值仿真方法对三维球鼻艏的入水砰击问题进行了研究.建立包含气水流场的三维有限元模型,研究了入水过程中流场的自由液面的变化、空气层的作用、纵向曲率和纵向速度对入水压力的影响等问题.结果表明,数值计算仿真的方法可以有效的模拟三维球鼻艏入水过程中自由液面和空气层的变化情况,在相同有效冲击角处球鼻艏的纵向曲率对砰击压力也有较大的影响.

Impacting study on the water entry of 3D bulbous bows

The impacting problem of the water entry of 3D bulbous bows was studied in this paper by means of the finite volume method based on the numerical simulation method. 3D finite element models including flow field were set up and the free surface change of flow field,the action of air layer,the effect of longitudinal curvature and velocity on hydraulic pressure were studied in course of the water entry. The results show that the numerical simulation method could simulate the change of free surface and air layer in the course of the water entry of 3D bulbous bows effectively. The longitudinal curvature of bulbous bows has considerable influences on the slamming pressure under the same effective impact angle.