Numerical Simulation of Water Entry Process of Trans-Medium Vehicles

LIU Pingan; GAO Hongtao; YANG Yanxi; HUANG Xi; GAO Song; JI Zhentao

doi:10.11993/j.issn.2096-3920.2024-0023

Volume 32 Issue 3

Jun 2024

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Article Navigation > Journal of Unmanned Undersea Systems > 2024 > 32(3): 463-473

LIU Pingan, GAO Hongtao, YANG Yanxi, HUANG Xi, GAO Song, JI Zhentao. Numerical Simulation of Water Entry Process of Trans-Medium Vehicles[J]. Journal of Unmanned Undersea Systems, 2024, 32(3): 463-473. doi: 10.11993/j.issn.2096-3920.2024-0023

Citation:

LIU Pingan, GAO Hongtao, YANG Yanxi, HUANG Xi, GAO Song, JI Zhentao. Numerical Simulation of Water Entry Process of Trans-Medium Vehicles[J]. Journal of Unmanned Undersea Systems, 2024, 32(3): 463-473. doi: 10.11993/j.issn.2096-3920.2024-0023

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Numerical Simulation of Water Entry Process of Trans-Medium Vehicles

doi: 10.11993/j.issn.2096-3920.2024-0023

LIU Pingan^1
,,
GAO Hongtao^2
,,
YANG Yanxi^1
,,
HUANG Xi^3
,,
GAO Song^4
,,
JI Zhentao^4
,

1.
College of Aerospace and Civil Engineering, Harbin Engineeing University, Harbin 150001, China
2.
Jincheng Nanjing Engineering Institute of Arcraft System, Aviation Industry Corporation of China, Nanjing 211100, China
3.
Xi’an Aerospace Propulsion Institute, China Aerospace Science and Technology Corporation sixth Research Institute, Xi’an 710100, China
4.
Hua’an Industry Group Co., LTD., China North Industries Group Corporation Limited, Qiqihaer 161046, China

Received Date: 2024-02-19
Accepted Date: 2024-05-11
Rev Recd Date: 2024-05-11

Available Online: 2024-05-23

Abstract

Abstract

The trans-medium water entry process of vehicles is often accompanied by multiphase flow, cavitation, phase change, and turbulence instability, which not only heighten the complexity of the flow field, but also render the forces highly unsteady and nonlinear. A numerical model for the water entry process of vehicles was developed. The volume of fluid(VOF) model was employed to capture the gas-liquid interface, and the Schnerr-Sauer model was utilized to describe the cavitation that occurred during the trans-medium process. The simulation of the water entry process of the trans-medium vehicle under different ventilation flows and deflection angles of the cavitator was carried out to investigate the flow field and cavity evolution laws during the trans-medium process. In addition, the fluid dynamics characteristics, as well as the kinematic characteristics of the vehicle during trans-medium process were analyzed. The simulation results show that the vehicle will present two different attitude change modes with the change of the ventilation flow during the water entry process: the increasing angular velocity leveling mode and the periodical pitching-type leveling mode. The water entry leveling process of the vehicle in different modes will show different motion characteristics. Moreover, an increase in the deflection angle of the cavitator and a decrease in the ventilation flow can improve the attitude change rate of the vehicle during the trans-medium water entry process.
- trans-medium vehicle,
- water entry,
- ventilation flow,
- deflection angle of cavitator

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References(15)

References

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