Investigation on the cavitation effect of underwater shock near different boundaries
Investigation on the cavitation effect of underwater shock near different boundaries
复制标题
不同边界附近水下激波空化效应研究
DOI：
10.1007/s13344-017-0046-x
复制
发表时间：
2017-08
影响因子：
1.6
通讯作者：
Feng Liang
中科院分区：
文献类型：
--
作者：
Xiao Wei;Wei Hai-peng;Feng Liang
水下爆炸冲击波传播到不同边界的表面时，会被反射。然后，由入射波和反射波的叠加形成负压区。当负压值低于水的蒸汽压时，就会发生空化。采用一种改进的基于谱单元方法的数值模型，研究了不同边界附近水下冲击波的空化效应，主要包括不同边界附近的空化效应特征以及不同参数对空化效应的影响。在改进的数值模型的实现中，用双线性状态方程处理空化流场，用场分离技术避免入射波在网格中传播的扭曲，用二阶二次渐近近似模拟无反射边界。主要研究结果如下。随着激波峰值压力和衰减常数的增大，空化区域的范围增大，空化持续时间增加。随着水深的增加，空化对球壳动力响应的影响逐渐减小。
When the shock wave of underwater explosion propagates to the surfaces of different boundaries, it gets reflected. Then, a negative pressure area is formed by the superposition of the incident wave and reflected wave. Cavitation occurs when the value of the negative pressure falls below the vapor pressure of water. An improved numerical model based on the spectral element method is applied to investigate the cavitation effect of underwater shock near different boundaries, mainly including the feature of cavitation effect near different boundaries and the influence of different parameters on cavitation effect. In the implementation of the improved numerical model, the bilinear equation of state is used to deal with the fluid field subjected to cavitation, and the field separation technique is employed to avoid the distortion of incident wave propagating through the mesh and the second-order doubly asymptotic approximation is applied to simulate the non-reflecting boundary. The main results are as follows. As the peak pressure and decay constant of shock wave increases, the range of cavitation domain increases, and the duration of cavitation increases. As the depth of water increases, the influence of cavitation on the dynamic response of spherical shell decreases.
登录
查看更多内容
DOI：
--
发表时间：
2014
期刊：
Journal of Ship Mechanics
影响因子：
--
作者：
Zong Zh
通讯作者：
Zong Zh
影响因子：
5.1
作者：
J. Brett;George Yiannakopolous
通讯作者：
J. Brett;George Yiannakopolous
影响因子：
3.6
作者：
K. Mäkinen
通讯作者：
K. Mäkinen
影响因子：
3.9
作者：
Youhu Zhang;B. Bienen;M. Cassidy;S. Gourvenec
通讯作者：
Youhu Zhang;B. Bienen;M. Cassidy;S. Gourvenec
DOI：
10.1016/j.cma.2005.03.007
发表时间：
2006-03
影响因子：
7.2
作者：
M. Sprague;T. L. Geers
通讯作者：
M. Sprague;T. L. Geers