Numerical Models for Calculating Ship Hydrodynamic Pressure Field in Restricted Waters with Significant Blocking Effect

被引：0
|
作者：
Deng H. [1 ]
Wang E. [1 ]
Yi W. [1 ]
Wang K. [2 ]
Zhang Z. [1 ]
机构：
[1] Department of Basic Courses, Naval University of Engineering, Wuhan
[2] Changjiang Institute of Survey, Planning, Design and Research, Wuhan
来源：
Binggong Xuebao/Acta Armamentarii | 2022年 / 43卷 / 03期
关键词：
Blocking effect; Mixed flow; Numerical model; Restricted water; Ship hydrodynamic pressure field;
D O I：
10.12382/bgxb.2021.0106
中图分类号：
学科分类号：
摘要：
Pressure mine works on the signal from ship hydrodynamic pressure field, which is more dangerous in shallow and offshore waters and so on. For obtaining the signals from ship hydrodynamic pressure fields in different restricted waters, a CFD numerical model is proposed based on the viscous theory, and the hydrodynamic characteristics, such as sinkage, trim, wave making and resistance, are calculated and validated. And a finite difference numerical model is established based on the potential flow theory, and the ship hydrodynamic pressure fields calculated by the two numerical models are compared. It is found that the two numerical models are different, but their calculated results are consistent, and they are both suitable for restricted waters with significant blocking effect or mixed flow. The results show that the more obvious the blocking effect is, the higher the grid division quality is, with giving small time step and setting denser grids near the water bottom and shore boundaries. If the blocking effect is more obvious, the restricted water has more significant effect on the hydrodynamic pressure field, and its negative pressure peak changes greatly, which may lead to the unreasonable design of mine fuze parameters, and miss the best detonation time. © 2022, Editorial Board of Acta Armamentarii. All right reserved.
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页码：605 / 616
页数：11
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