Rapid prediction and numerical verification of high-speed water-entry impact response of spherical-nosed cone

LIU Ping; HUANG Jiahao; WANG Xinggang; ZHAO Junqi; ZENG Mengcheng; YAN Zhi; XIONG Yongliang

doi:10.11993/j.issn.2096-3920.2025-0116

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LIU Ping, HUANG Jiahao, WANG Xinggang, ZHAO Junqi, ZENG Mengcheng, YAN Zhi, XIONG Yongliang. Rapid prediction and numerical verification of high-speed water-entry impact response of spherical-nosed cone[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0116

Citation:

LIU Ping, HUANG Jiahao, WANG Xinggang, ZHAO Junqi, ZENG Mengcheng, YAN Zhi, XIONG Yongliang. Rapid prediction and numerical verification of high-speed water-entry impact response of spherical-nosed cone[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0116

Citation:

LIU Ping, HUANG Jiahao, WANG Xinggang, ZHAO Junqi, ZENG Mengcheng, YAN Zhi, XIONG Yongliang. Rapid prediction and numerical verification of high-speed water-entry impact response of spherical-nosed cone[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0116

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Rapid prediction and numerical verification of high-speed water-entry impact response of spherical-nosed cone

doi: 10.11993/j.issn.2096-3920.2025-0116

1.
Institute System of Engineering, China Academy of Engineering Physics, Mianyang, 621900, China
2.
School of aerospace, Huazhong University of Science and Technology, Wuhan 430074, China

Received Date: 2025-09-02
Accepted Date: 2025-10-20
Rev Recd Date: 2025-10-04

Available Online: 2026-01-14

Abstract

Abstract

Aiming at the complex physical phenomena of spherical-nosed cone across media water entry, this study develops a rapid prediction model for water-entry impact overload of spherical-nosed cone based on water-entry dynamics and exact geometric characterization method. Based on water-entry dynamics of the projectile, for typical water entry stages, the rapid predicting model incorporates the influence of added mass to, obtain ideal fluid forces, while viscous fluid forces are obtained through force analysis of cross-sectional slice analysis of the submerged projectile. By integrating the ideal fluid forces and viscous fluid forces of each slice along the axial direction of the structural body, multi-stage dynamic equations governing the water entry process of spherical-nosed cone obtained finally. To verify the validity of the proposed model, numerical experiments employ multiphase flow model, k-ε turbulence model and overlapping mesh method. Based on the CFD, high-speed water entry process of conical-nose projectiles with 5°–15° angles and 50–90°(vertical) impact angles into quiescent water from air is investigate, then high-speed water entry law of the projectile is obtained. By comparing with the results from numerical simulations, it is demonstrated that the rapid prediction model could accurately predict the impact loads-as well as the occurrence of projectiles entering water, while achieving a 2-order-of-magnitude improvement in computational efficiency over conventional CFD methods, making it suitable for rapid assessment in the field of engineering.
- cross-media navigation,
- rapid prediction model,
- spherical-nosed cone,
- water-entry at high speed,
- computational fluid dynamics

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References(35)

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