航行体出水过程空化结构演变与溃灭载荷特性研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (2) : 306-314.

论文

高山1,2，施瑶1,2,潘光1,2

作者信息 +

Evolution of cavitation structure and collapse load characteristics during underwater vehicle exiting-water process

GAO Shan1,2， SHI Yao1,2， PAN Guang1,2

Author information +

文章历史 +

摘要

高速航行体肩部附着空泡穿越自由液面过程中发生溃灭现象，将产生巨大的冲击载荷，严重影响航行体出水姿态和结构安全性。本文采用改进型分离涡模型，建立了水下发射非定常空化特性数值模拟方法。结果表明：航行体附着空泡出水过程自上而下发生溃灭现象，在溃灭末期收缩为较小的孤立空泡，溃灭产生的高速射流冲击结构表面；在出水过程中，水面附近的“反向旋转涡对”导致附着空泡发生了快速溃灭现象，以发卡涡为代表的壁面涡旋结构发展明显受到附着空泡的抑制；空泡溃灭末期的孤立泡产生了巨大的冲击压力峰值，对航行体结构安全性将造成巨大破坏。然而，初期航行体迎流侧空泡溃灭行为也会导致较大的压力峰值出现。

Abstract

During the process of high-speed vehicle exiting-water, its shoulder attached to cavitation across the free liquid surface collapse phenomenon, generating huge impact load, seriously affecting the vehicle exiting-water posture and structural safety. To investigate the evolution of the cavitation flow field details and the collapse load characteristics of the vehicle exiting-water process, this paper adopts the improved delayed detached eddy simulation model. The results show that: the collapse of the vehicle attached to the cavitation during exiting-water process occurs from top to bottom, and at the end of the collapse shrinks to a smaller isolated bubble, the collapse of the resulting high-speed jet impact on the surface of the structure. During the exiting-water process, the counter-rotating vortex pairs near the water surface led to the rapid collapse of the attached cavitation, and the development of the wall vortex structure represented by the hairpin vortex was obviously inhibited by the attached cavitation. The isolated bubble collapse generates a huge impact pressure peak, which causes great damage to the structural safety of the vehicle; However, the bubble collapse behavior on the face flow of the vehicle lead to the appearance of larger pressure peaks.

导出引用

高山1,2，施瑶1,2,潘光1,2. 航行体出水过程空化结构演变与溃灭载荷特性研究[J]. 振动与冲击, 2024, 43(2): 306-314

GAO Shan1,2， SHI Yao1,2， PAN Guang1,2. Evolution of cavitation structure and collapse load characteristics during underwater vehicle exiting-water process[J]. Journal of Vibration and Shock, 2024, 43(2): 306-314

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