楔形体入水初期流场的数值模拟

Numerical Simulation of Initial Flow of Wedge Entry

本文应用VOF方法对楔形体入水初期流场进行了数值计算与分析,并与楔形体入水初期流场PIV试验结果及高速摄影流态显示试验结果做了比较。结果表明,水下流场的流态与PIV试验结果一致,自由面形状与高速摄影试验结果一致,贴近物面有一股向上的射流,速度很高。本数值计算方法可以较好地模拟水下速度场、捕捉自由面形状,并能模拟入水喷溅现象。

The initial flow field of wedge entry was studied by the VOF method (Volume of Fluid). The numerical simulation was compared with PIV experiments and high-speed photographic visualization. The results show that the flow structure below free surface agrees well with PIV experiment, the shape of free surface agrees with high - speed photographic visualization. There is a high-speed water jet near oblique side of wedge. The present method can be used to simulate underwater flow field, free surface and splash phenomenon of water entry.