Numerical Analysis of the Effect of Stern Flap on the Hydrodynamic Performance of Amphibious Vehicles

ZHANG Guoqing; FENG Yikun; JIN Haobin; GE Qiqian; XU Xiaojun

doi:10.11993/j.issn.2096-3920.2025-0126

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ZHANG Guoqing, FENG Yikun, JIN Haobin, GE Qiqian, XU Xiaojun. Numerical Analysis of the Effect of Stern Flap on the Hydrodynamic Performance of Amphibious Vehicles[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0126

Citation:

ZHANG Guoqing, FENG Yikun, JIN Haobin, GE Qiqian, XU Xiaojun. Numerical Analysis of the Effect of Stern Flap on the Hydrodynamic Performance of Amphibious Vehicles[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2025-0126

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Numerical Analysis of the Effect of Stern Flap on the Hydrodynamic Performance of Amphibious Vehicles

doi: 10.11993/j.issn.2096-3920.2025-0126

College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China

Received Date: 2025-09-11
Accepted Date: 2025-10-09
Rev Recd Date: 2025-10-01

Available Online: 2026-01-13

Abstract

Abstract

To explore the effect mechanism of stern flap on the hydrodynamic performance of amphibious vehicles, a combination of towing tests and numerical simulation methods was adopted to comparatively analyze the motion parameters, waveforms and pressure distribution of the vehicle at different speeds before and after the installation of stern flap base on STAR-CCM+. The results show that stern flap significantly alters the hydrodynamic characteristics of the vehicle. In terms of motion parameters, its introduction leads to a trend of first decreasing and then increasing in resistance, with a resistance reduction rate of 21.6% at Fr = 0.738. The regulation effect on sailing attitude is prominent, with a peak difference in pitch angle reaching 63.3% (Fr = 0.738), and it effectively suppresses the heave within the speed range. The stern flap significantly reconstructs the waveform of flow field around the amphibious vehicle and the pressure distribution characteristics of vehicle by changing the pitch angle and heave amplitude, and its effect is speed-dependent.
- stern flap,
- amphibious vehicle,
- towing test,
- sailing attitude,
- resistance characteristics

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References(20)

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