Study on the water entry process of the vehicle under the restriction of the underwater ice hole

HU Xinyu; WANG Cong; WEI Yingjie

doi:10.11993/j.issn.2096-3920.2025-0077

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HU Xinyu, WANG Cong, WEI Yingjie. Study on the water entry process of the vehicle under the restriction of the underwater ice hole[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0077

Citation:

HU Xinyu, WANG Cong, WEI Yingjie. Study on the water entry process of the vehicle under the restriction of the underwater ice hole[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0077

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Study on the water entry process of the vehicle under the restriction of the underwater ice hole

doi: 10.11993/j.issn.2096-3920.2025-0077

School of Astronautics, Harbin Institute of Technology, Harbin 150001, China

Received Date: 2025-06-10
Accepted Date: 2025-08-18
Rev Recd Date: 2025-07-13

Available Online: 2025-11-24

Abstract

Abstract

The water entry process of a vehicle passing through an underwater ice hole is of great engineering significance in the launching operation of polar ocean detectors and the deployment strategy of related equipment in polar regions. However, the research on the water entry behavior of the vehicle under the ice hole structure is still limited, especially the lack of systematic understanding of the coupling relationship between the cavity evolution mechanism and the dynamic response of the vehicle under the ice hole constraint. Therefore, the numerical simulation method based on computational fluid dynamics(CFD) is adopted in this paper, and the water entry process of the vehicle passing through the underwater ice hole is studied, revealing the coupling characteristics between the flow field structure, cavity evolution, and the motion state of the vehicle under the constraint of the ice hole. The results show that when the vehicle passes through the underwater ice hole, the cavity undergoes the evolution process of contraction first and then expansion, and the fluid resistance also increases first and then decreases. As the vehicle gradually passes through the hole, the velocity around the wall increases significantly, and the asymmetry of the tail flow field intensifies. In addition, the velocity of the vehicle decreases when it passes through the hole, and its turning point is basically consistent with the time of cavity collapse. When the vehicle passes through the hole completely, the motion trajectory deflects. The above findings not only enrich the understanding of water entry dynamics under the constraint of the ice hole but also provide a theoretical basis for the launch path design and structural optimization of polar detectors.
- ice hole,
- vehicle,
- water entry,
- cavity evolution

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References(26)

References

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