Experimental study on high-velocity oblique water entry ofa trans-media vehicle with tail-skirt

LIU Xiyan; YUAN Xulong; LUO Kai; QI Xiaobin; LU Na

doi:10.11883/bzycj-2022-0509

Volume 43 Issue 11

Nov. 2023

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LIU Xiyan, YUAN Xulong, LUO Kai, QI Xiaobin, LU Na. Experimental study on high-velocity oblique water entry ofa trans-media vehicle with tail-skirt[J]. Explosion And Shock Waves, 2023, 43(11): 113301. doi: 10.11883/bzycj-2022-0509

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LIU Xiyan, YUAN Xulong, LUO Kai, QI Xiaobin, LU Na. Experimental study on high-velocity oblique water entry ofa trans-media vehicle with tail-skirt[J]. Explosion And Shock Waves, 2023, 43(11): 113301. doi: 10.11883/bzycj-2022-0509

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Experimental study on high-velocity oblique water entry ofa trans-media vehicle with tail-skirt

doi: 10.11883/bzycj-2022-0509

LIU Xiyan^1
,,
YUAN Xulong^{1
,
,},
LUO Kai¹,
QI Xiaobin^{1, 2},
LU Na¹

1.
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China
2.
Northwest Institute of Mechanical and Electrical Engineering, Xianyang 712099, Shaanxi, China

Funds: ZHAO C G. Research on multiphase flow and trajectory characteristics of unsteady movement of high speed projectile [D]. Harbin, Heilongjiang, China: Harbin institute of technology, 2017: 95-99.

Received Date: 2022-11-14
Rev Recd Date: 2023-07-10

Available Online: 2023-07-21

Publish Date: 2023-11-17

Abstract

Abstract

To study the cavity development and motion characteristics of the trans-media vehicle with tail-skirt during the process of oblique water entry at high velocity, a high-speed water-entry experiment at platform was built, and an experimental model with inertial measurement unit system was designed. The experimental study was carried out on the trans-media vehicle model with tail-skirt when the water-entry angle was 20° and the water-entry velocity ranged from 30 m/s to 130 m/s. A high-velocity camera was used to record the cavity during water entry, and the inertial measurement unit was used to measure the motion parameters of the vehicle and the pressure inside the cavity. The cavity development characteristics, the motion characteristics and the changing law of the pressure inside the cavity during the high-velocity oblique water entry were obtained. The experimental results show that the planning motion characteristics was formed during the water-entry process of the trans-media vehicle with tail-skirt, and the bending deformation of the cavity occurred. With the increase of the water entry velocity, the upward deflection trend of the water-entry trajectory became more obvious. The peak axial load of the vehicle entering water lasted for a long interval, so load reduction should be considered in the process of crossing media. The peak normal load gradually dropped to about zero after entering the water 1.5 times the length of the vehicle. During the high-velocity water-entry process, the upper surface of the trans-media vehicle was always wrapped in the cavity. The pressure inside the cavity decreased first and then increased with the formation and development of the cavity. The minimum pressure changed linearly with the water entry velocity, while the formation time was basically the same.
- trans-media vehicle,
- water-entry cavity,
- pressure inside cavity,
- impact load,
- planning motion characteristics

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References(25)

References

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