江海直达船船首入水砰击研究

基于有限体积法的数值仿真方法对3种不同江海直达船船首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,研究了在自由液面的变化、空气层的作用下、不同垂向速度时3种船首入水砰击问题。结果表明,数值计算仿真的方法可以有效地模拟江海直达船船首入水过程中自由液面和空气层的变化情况。在此方法下,相同速度时西瓜首的砰击峰值优于其他船首形式。

Impacting Study on the Water Entry of the Bow of River-sea Ship

The impacting problem of the water entry of three type river-sea ship＇s bow 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 free surface change of flow field,with the effect of vertical velocity the three type of bow 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 the bow of river-sea ship effectively.