水下航行体出水空泡发展和溃灭机理

doi:10.7527/S1000-6893.2023.28820

Abstract

Abstract:

The impact load generated by the cavitation collapse during the process of crossing the medium can affect the motion and structure of a vessel， even causing damage， but the inherent mechanism of cavitation development and collapse during the water exit of the underwater vessel remain unclear. To investigate the dynamic mechanism of cavitation development and collapse during the process of high-speed water exit from a vessel's shoulder and explore feasible research methods of vessel water exit cavitation， the authors adopted the boundary element method and utilized a self-programmed code to simulate cavitation development and collapse during the water exit process. The complete process of cavitation development of underwater vessel during the water exit process is calculated， and the coupling mechanism between cavitation and free surface during collapse is studied. The results indicate that the boundary element method can accurately and effectively simulate the morphological changes and dynamic characteristics of cavitation during the water exit process， and accurately describe the ring-shaped jet and synchronous collapse phenomenon of cavitation near the free surface and during the water exit process. In addition， the study calculated the water impact pressure caused by the ring-shaped jet， which can provide a reference for the prediction and calculation of water exit loads of the vessel.

Key words: water exit of vessel, potential flow theory, boundary element method, near-free surface coupling, cavitation collapse

CLC Number:

V221.1⁺7

Jingyu GU, Shuai LI, Aman ZHANG. Development and collapse mechanism of underwater vessel water exit cavitation[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(21): 528820-528820.

Figures/Tables 10

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Table 1

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压力	Fr
压力	9.58	10.35	11.067	11.739
理论值/MPa	0.705	0.792	0.868	0.942
计算值/MPa	0.666	0.743	0.816	0.894
误差/%	5.53	4.92	5.99	5.09

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Development and collapse mechanism of underwater vessel water exit cavitation

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