Stability analysis of high-speed spin-stabilized supercavitating projectiles during water entry
Year: 2024
Type: article
Abstract: This study explores the fluid-structure interaction (FSI) phenomena associated with spin-stabilized supercavitating projectiles and the influence on the structural stability of the projectiles. Fluid-structure interaction simulations are performed on projectiles during high-speed water entry, and the results are contrasted with those derived from rigid body models. The results indicate that the stability of the trajectory of the projectile is critically dependent on its angular velocity of spin; however, substantial differences are observed between the FSI simulations and the rigid body model results. The analysis of theoretical models and the validation through simulations demonstrate that rigid body simulations are ineffectual at high spin angular velocities and produce imprecise results. Furthermore, both the FSI research findings and theoretical analyses reveal a critical spin angular velocity threshold. Above this threshold, significant structural deformation occurs, and stability cannot be maintained; below it, the projectile undergoes periodic bending deformation. Theoretical analysis has identified an optimal spin angular velocity, calculated as the critical velocity multiplied by [[EQUATION]], which minimizes bending deformation over a specified duration. The findings from this study are critically important for the design of spin-stabilized supercavitating projectiles, suggesting the use of the natural frequency of the projectile to estimate critical spin angular velocity and thereby guide design strategies to enhance structural stability.
Source: Applied Ocean Research
Authors: Changle Hao, Jianjun Dang, Chuang Huang, Kai Luo, Kan Qin
Language: English
Subfield: Ocean Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,080
OpenAlex ID: W4405424553