Open AccessThe Numerical Simulation of the Vertical Water Entry Process of High Speed Projectile with Small Angle of Attack
Author(s) -
Ruijie Li,
Rui Wang,
Zhong Yao,
Sun Yanhu,
Jiawen Wang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1865/4/042124
Subject(s) - projectile , mechanics , materials science , process (computing) , computer simulation , rotation (mathematics) , angle of attack , physics , geometry , computer science , mathematics , metallurgy , operating system , aerodynamics
Based on the numerical simulation method, the high speed vertical water entry process of projectile moving at 1000m/s with small angle of attack is studied. By analyzing the cavity configuration and hydrodynamic characteristics of the process, the influences of the small entry angle on the water entry stability process are obtained. The simulation results indicate that the projectile’s ballistic can achieve relative stable state when the water entry angle is less than 0.5°, otherwise the water entry cavity can be pierced by tail fin. The pierced size tend to increase with the increased water entry angle as well as the projectile’s ballistic become unstable. In addition, the rotation of the projectile owing to pitching moment has little effect on cavity configuration and water entry stability.