Numerical simulation and analysis of the underwater implosion of spherical hollow ceramic pressure hulls in 11000 m depth

IF 13 1区 工程技术 Q1 ENGINEERING, MARINE
Shengxia Sun, Fenghua Chen, Min Zhao
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引用次数: 1

Abstract

Pressure hulls play an important role in deep-sea underwater vehicles. However, in the ultra-high pressure environment, a highly destructive phenomenon could occur to them which is called implosion. To study the characteristics of the flow field of the underwater implosion of hollow ceramic pressure hulls, the compressible multiphase flow theory, direct numerical simulation, and adaptive mesh refinement are used to numerically simulate the underwater implosion of a single ceramic pressure hull and multiple linearly arranged ceramic pressure hulls. Firstly, the feasibility of the numerical simulation method is verified. Then, the results of the flow field of the underwater implosion of hollow ceramic pressure hulls in 11000 m depth is analyzed. There are the compression-rebound processes of the internal air cavity in the implosion. In the rebound stage, a shock wave that is several times the ambient pressure is generated outside the pressure hull, and the propagation speed is close to the speed of sound. The pressure peak of the shock wave has a negative exponential power function relationship with the distance to the center of the sphere. Finally, it is found that the obvious superimposed effect between spheres exists in the chain-reaction implosion which enhances the implosion shock wave.

11000m深球形中空陶瓷耐压壳水下内爆的数值模拟与分析
压力船体在深海水下航行器中起着重要作用。然而,在超高压环境中,它们可能会发生一种极具破坏性的现象,称为内爆。为了研究中空陶瓷耐压壳水下内爆流场的特点,采用可压缩多相流理论、直接数值模拟和自适应网格细化方法,对单个陶瓷耐压壳和多个线性排列陶瓷耐压壳的水下内爆炸进行了数值模拟。首先,验证了数值模拟方法的可行性。然后,对11000m深度中空陶瓷耐压壳水下内爆流场进行了分析。内爆过程中存在内部气腔的压缩回弹过程。在回弹阶段,压力壳外会产生数倍于环境压力的冲击波,传播速度接近音速。冲击波的压力峰值与到球体中心的距离呈负指数幂函数关系。最后发现,链式内爆中存在明显的球体间叠加效应,增强了内爆冲击波。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
11.50
自引率
19.70%
发文量
224
审稿时长
29 days
期刊介绍: The Journal of Ocean Engineering and Science (JOES) serves as a platform for disseminating original research and advancements in the realm of ocean engineering and science. JOES encourages the submission of papers covering various aspects of ocean engineering and science.
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