Effects of the launch parameters on trans-phase stability performance and mechanism for submarine-launched missiles model

• Published in: Ocean engineering 2023-09, Vol.283, p.115083, Article 115083
• Main Authors: Zhuang, Qibin, Zhang, Huanbin, Zhao, Chenhong, He, Xingyu, Liu, Yu, Liu, Zhirong, Li, Shuping, Zhu, Rui, Wu, Dezhi
• Format: Article
• Language: English
• Subjects: Head shape; Stability; Trans-phase; Turbulent kinetic energy; Underwater launch missile
• ISSN: 0029-8018; 1873-5258
• DOI: 10.1016/j.oceaneng.2023.115083

The impact of missile head shape, launch angle, and Fr number on the stability of trans-phase missiles was investigated, providing both experimental and theoretical support for designing diverse ballistic trans-phase weapons and aircraft. Through water-to-air trans-phase experiments and numerical calculations of missiles, deflection angle, velocity, and trajectory are obtained, while statistical and flow-field analyses reveal associated stability mechanisms. The research results indicate a good agreement between the experimental and numerical results. As the Fr number increases for the same head shape, the variations in transient deflection angle decrease. The deflection angle shows notable variations for different head shapes under the same Fr number. Specifically, the flat head demonstrates the highest deflection angle, followed by the 120° conical head, the 90° conical head, and finally the round head shape. Different head shapes lead to varying water film deformations and turbulent kinetic energy dissipations, resulting in differences in shedding vortex intensity and frequency. Launch angles cause variable component wall shear forces and fluid resistances, while changing the Fr number affects initial kinetic energy and energy dissipation, leading to missile model stability differences. •Investigated the impact of missile head shape, launch angle, and Fr number on trans-phase stability, providing valuable insights for designing ballistic trans-phase weapons and aircraft.•Conducted underwater launch tests and numerical simulations to analyze deflection angle, velocity, and trajectory of submarine-launched missiles during trans-phase motion.•Established a trans-phase test platform and employed high-speed camera technology for precise motion dynamics analysis, ensuring accurate experimental results.•Demonstrated good agreement between experimental and numerical findings, validating the reliability of the research methodology.•Identified the influence of head shape, launch angle and Fr number on transient deflection angle variations, shedding vortex intensity, water film deformation, and fluid resistance, contributing to a comprehensive understanding of trans-phase stability mechanisms.