Numerical study on the calculation of hydrodynamic coefficient and judgment of motion stability of submersibles

Wang Yuhong; You Haiyang; Bai Jinku; Lin Yuan; Guo Jin

doi:10.12284/hyxb20250131

Volume 47 Issue 12

Dec. 2025

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Wang Yuhong，You Haiyang，Bai Jinku, et al. Numerical study on the calculation of hydrodynamic coefficient and judgment of motion stability of submersibles[J]. Haiyang Xuebao，2025, 47(12)：114–125 doi: 10.12284/hyxb20250131

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Numerical study on the calculation of hydrodynamic coefficient and judgment of motion stability of submersibles

doi: 10.12284/hyxb20250131

Wang Yuhong^1
,,
You Haiyang¹,
Bai Jinku³,
Lin Yuan¹,
Guo Jin^{1, 2
,
,}

1.
Ocean College, Zhejiang University, Zhoushan 316021, China
2.
State Key Laboratory of Ocean Sensing (& Ocean College), Zhejiang University, Hangzhou 310058, China
3.
Zhejiang Wenhai Technology Co., Ltd., Zhoushan 316021, China

Received Date: 2025-08-19
Rev Recd Date: 2025-12-16

Available Online: 2025-12-26

Publish Date: 2025-12-31

Abstract

Abstract

The disk-shaped submersible exhibits exceptional maneuverability, including zero-radius turning, precise landing, and stable hovering capabilities, which hold significant importance for enhancing the operational efficiency of seabed observation systems. However, research focusing on the hydrodynamic performance of disk-shaped submersibles remains limited. This study innovatively proposes a methodology integrating Planar Motion Mechanism (PMM) numerical experiments with the Routh criterion to evaluate the motion stability of disk-shaped submersibles. Firstly, the governing equations for submersible motion and motion stability criteria were derived. Subsequently, a numerical simulation model was established, and PMM-based numerical experiments were designed to calculate hydrodynamic coefficients. This research represents the first systematic comparison of hydrodynamic performance between HG1 and HG3 hull configurations in disk-shaped submersibles using the Routh criterion. The derived stability coefficients for horizontal and vertical motions demonstrate superior motion stability in the HG3 configuration. These findings were further validated through scale model basin experiments. The proposed numerical approach can be extended to motion stability analysis of various operational submersibles, effectively reducing the substantial costs associated with physical experiments while enhancing submersible performance in marine engineering applications.
- submersible,
- computational fluid dynamics,
- hydrodynamic coefficient,
- Routh criterion,
- motion stability

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References(28)

References

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