Computational investigation on ventilated supercavitating flows and its hydrodynamic characteristics around a high-speed underwater vehicle

Choe, Young Min; Kim, Chongam

doi:10.1016/j.oceaneng.2022.110865

Cited by 12 publications

(1 citation statement)

References 29 publications

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“…The characteristic size of supercavitation primarily consist of the characteristic diameter D c /D n and the characteristic length L c /D n , which are minimally influenced by the geometric characteristics of the vehicle. Based on experimental results from previous studies [22] and other related research [37,38], simulations were conducted under identical boundary conditions, allowing for a comparison between the simulated characteristic size and experimental results as presented in Table 4. The maximum error observed was 9.48%, with an average error of 6.52%.…”

Section: Heat Exchanger Modelmentioning

confidence: 99%

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: Heat Exchanger Modelmentioning

confidence: 99%