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Numerical and experimental study of cone-headed projectile entering water vertically based on MMALE method
oleh: Miaomiao Cao, Zhiyu Shao, Siyu Wu, Chaochao Dong, Xiaotian Yang
Format: | Article |
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Diterbitkan: | Elsevier 2021-01-01 |
Deskripsi
The water entry behaviors of projectiles with different cone-headed angles were studied numerically, experimentally and theoretically, mainly focusing on the hydrodynamic impact in the initial stage. Based on MMALE algorithm, it was proposed a formula of impact deceleration, which relied on the initial entry velocity and cone-headed angle. Meanwhile, in order to verify the validity of the simulation model, experiments using accelerometer and high-speed camera were carried out, and their results were in a good agreement with simulation results. Also, theoretical calculation results of cavity diameter were compared with experiments and simulation results. It was observed that the simulation method had a good reliability, which would make forecast on impact deceleration in an engineering project.