A review of underwater vehicle motion stability

Bao, Haimo; Zhang, Yan; Song, Meiping; Kong, Qiao; Hu, Xiaohui; An, Xuanang

doi:10.1016/j.oceaneng.2023.115735

Cited by 8 publications

(2 citation statements)

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“…where h aw is the convective heat transfer coefficient of air; A w is the heat transfer area between the inner wall of the tank and the air; T w and T a are the temperature of the inner wall of the tank and the compressed air, respectively. The air state equation of the gas storage tank venting process can be derived based on the specific enthalpy definition h = u + pv and Equations ( 1)-( 3), as demonstrated in Equation (4).…”

Section: Compressed Air Power System Models 221 Air Storage Tank Modelmentioning

confidence: 99%

“…Endurance time and speed are crucial performance indicators for UUV. Most typical light and heavy UUV speeds at home and abroad remain below 6 kn; however, a few can reach 6-12 kn [2][3][4]. Meeting future ocean operation needs while improving mission execution capability and underwater survivability requires enhancing high-speed navigation capabilities beyond 20 kn as well as high-mobility capabilities exceeding 2 m/s 2 through joint development of power systems, drag reduction techniques, propulsion methods, and control mechanism energy supplement technologies along with structural design improvements [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Characteristics on a Compressed Air Power System Generating Supercavitation Drag Reduction for Underwater Vehicles

He,

Zhang

2024

Energies

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An unmanned underwater vehicle (UUV) powered by a compressed air power system is proposed to address challenges for battery/motor-powered vehicles under high-speed navigation, long endurance, and high mobility. These vehicles actively utilize supercavitation drag reduction by the exhausted gas from the compressed air power system. MATLAB/Simulink and FLUENT are used to establish theoretical models of the compressed air power system and ventilation supercavitation. The relationship between system power and navigation resistance is examined with different air flows, along with a comparison of endurance of different power vehicles at various speeds. The issue of the endurance-enhancing effect of supercavitation at high speed is investigated. The results demonstrate that increasing the air flow leads to higher power and reduced navigation resistance, and there is a balance between them. Furthermore, compared to the battery-powered vehicles with equal energy storage capacity, the compressed air power system shows 210.08% to 458.20% longer endurance times at speeds of 30 kn to 60 kn. Similarly, considering equal energy storage mass, it achieves 42.02% to 148.96% longer endurance times at high speeds (30 kn to 60 kn). The integration of supercavitation and air-powered systems can greatly enhance the endurance and maneuverability of the vehicle at high speeds while ensuring a compact system structure. The investigations could offer valuable ideas for the development and application of compressed air power systems for UUV at 30 kn to 60 kn or higher maneuvering.

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Section: Compressed Air Power System Models 221 Air Storage Tank Modelmentioning

confidence: 99%