TY - JOUR
T1 - 海 洋 内 波 影 响 水 下 航 行 体水 动 力 特 性 数 值 模 拟
AU - Wang, Chao
AU - Du, Wei
AU - Li, Guanghua
AU - Du, Peng
AU - Zhao, Sen
AU - Li, Zhuoyue
AU - Chen, Xiaopeng
AU - Hu, Haibao
N1 - Publisher Copyright:
© 2022 Editorial Department of Journal of Nanjing Agricultural University. All rights reserved.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - [Objective] This paper aims to explore the hydrodynamic characteristics of underwater vehicles under the action of internal solitary waves.[Methods]Based on the internal solitary wave mKdV theory under the strong stratification assumption, the incompressible Navier-Stokes (N-S) equation is discretized by the finite volume method. Combining the velocity entrance wave-making and overset grid methods, a numerical model of an underwater vehicle coupled with internal solitary waves in stratified flow is established. Through this model, the coupling process of internal solitary waves and fixed and suspended vehicles in different internal wave environments is simulated, and the variation law of the hydrodynamic load is obtained by numerical solution. [Results]The amplitude of the force and moment of the underwater vehicle increases with the increase in wave amplitude. When the position of the fixed vehicle is close to the interface of two layers of fluid, it is more severely affected. When the suspended vehicle is close to the wave trough, the impact is more significant. The increase in the initial pitch angle will lead to a sharp increase in the horizontal force amplitude of the vehicle. In addition, the "falling depth" phenomenon occurs when a vehicle with initial speed is affected by the main wave and coda wave of an internal solitary wave.[Conclusion]The results obtained in this paper have reference value for safe operation of underwater vehicles.
AB - [Objective] This paper aims to explore the hydrodynamic characteristics of underwater vehicles under the action of internal solitary waves.[Methods]Based on the internal solitary wave mKdV theory under the strong stratification assumption, the incompressible Navier-Stokes (N-S) equation is discretized by the finite volume method. Combining the velocity entrance wave-making and overset grid methods, a numerical model of an underwater vehicle coupled with internal solitary waves in stratified flow is established. Through this model, the coupling process of internal solitary waves and fixed and suspended vehicles in different internal wave environments is simulated, and the variation law of the hydrodynamic load is obtained by numerical solution. [Results]The amplitude of the force and moment of the underwater vehicle increases with the increase in wave amplitude. When the position of the fixed vehicle is close to the interface of two layers of fluid, it is more severely affected. When the suspended vehicle is close to the wave trough, the impact is more significant. The increase in the initial pitch angle will lead to a sharp increase in the horizontal force amplitude of the vehicle. In addition, the "falling depth" phenomenon occurs when a vehicle with initial speed is affected by the main wave and coda wave of an internal solitary wave.[Conclusion]The results obtained in this paper have reference value for safe operation of underwater vehicles.
KW - hydrodynamic characteristics
KW - internal solitary wave
KW - numerical simulation
KW - underwater vehicles
UR - http://www.scopus.com/inward/record.url?scp=85135404593&partnerID=8YFLogxK
U2 - 10.19693/j.issn.1673-3185.02742
DO - 10.19693/j.issn.1673-3185.02742
M3 - 文章
AN - SCOPUS:85135404593
SN - 1673-3185
VL - 17
SP - 102
EP - 111
JO - Chinese Journal of Ship Research
JF - Chinese Journal of Ship Research
IS - 3
ER -