摘要
物体入水时波浪的影响不可忽略,基于流体力学模型采用VOF法,并利用自定义函数,模拟了楔形体的自由入水过程;同时结合推波板原理及海绵层消波理论实现了数值水槽的造消波,完成了波浪中楔形体自由入水的模拟,计算了楔形体入水时所受的水作用力、自由液面变化及物面压强分布等,研究了不同波高、周期以及在波浪不同位置入水时对楔形体的影响。结果表明:本文建立的数值模型可很好地模拟楔形体入水造成的射流及空泡的形成发展过程,波浪对楔形体入水的影响主要由波浪内部流场变化及表面波形决定,在波浪不同位置处入水对楔形体受力及入水形态均有较大影响。
Wave impact in body water-entry cannot be ignored. Based on the hydrodynamic model,the free falling wedge water-entry cases are simulated by using the volume of fluid（ VOF） method and user-defined functions. Considering the push-wave plate principle with sponge layer theory,the numerical wave flume was built. The free falling wedge in wave water-entry case was simulated,and the vertical hydrodynamic force,velocity and pressure distributions of the wedge were computed. The influence of different wave heights,wave periods and positions on wedge water-entry was also studied. Numerical results show that the free surface profile and bubble development of wedge water-entry can be simulated accurately by the module. The influence of wave on wedge water-entry was decided by the free surface and velocity field in wave flume,and the water-entry positions in wave flume had a greater impact on the wedge force and form after entering the water.
出处
《海洋工程》
CSCD
北大核心
2017年第5期42-50,共9页
The Ocean Engineering
基金
国家自然科学基金(51709054)
海洋公益性行业科研专项资助项目(201405025
201505019)
关键词
楔形体
波浪
入水
VOF
数值模拟
wedge
wave
water-entry
the volume of fluid(VOF) method
numerical simulation
