高速垂直入水车辆的气蚀和流场演变分析

IF 3.6 2区 工程技术 Q1 MECHANICS International Journal of Multiphase Flow Pub Date : 2024-08-22 DOI:10.1016/j.ijmultiphaseflow.2024.104968
Yilan Yu , Pengcheng Ye , Guangtao Liu , Yao Shi , Guang Pan
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引用次数: 0

摘要

开发了一种数值方法来考虑流体力和结构变形对流场的影响。实验验证了该方法的准确性。研究了空腔的演变过程,分析了计算流场区域的速度和涡流特征。模拟了飞行器周围空腔动壁的运动过程,得到了飞行器尾部的涡流分布、空腔尾部的不稳定以及空腔壁的多级关闭等现象。结果表明,空腔关闭会导致空腔内流场速度降低,空腔关闭产生的回流射流会撞击飞行器并导致其姿态偏转。空腔壁的峰值速度出现在空腔关闭位置和头部空腔产生位置。车辆周围的涡流尺度从车身头部向水面顶部逐渐增大。本文的研究为水上飞行器的设计提供了参考。
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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Analysis on the evolution of cavitation and flow field of vehicles entering water vertically at high speed

A numerical method is developed to consider the effects of fluid force and structural deformation on the flow field. The accuracy of the method is verified by experiments. The cavity evolution process are studied, and the characteristics of the velocity and vortex in the calculated flow field region are analyzed. The motion process of the dynamic wall of the cavity around the vehicle is simulated, and the phenomena of vortex distribution in the wake of the vehicle, instability in the wake of the cavity, and multistage closure of the cavity wall are obtained. It is revealed that the closing of the cavity will cause the velocity of the flow field inside the cavity to be reduced, and the return jet generated by the closing of the cavity will hit the vehicle and cause its attitude to be deflected. The peak velocity of the cavity wall appears at the position of cavity closure and the position of head cavity generation. The vortex scale around the vehicle gradually increases from the head of the body towards the top of the water surface. The research in this paper provides reference for the design of water entry vehicle.

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来源期刊
CiteScore
7.30
自引率
10.50%
发文量
244
审稿时长
4 months
期刊介绍: The International Journal of Multiphase Flow publishes analytical, numerical and experimental articles of lasting interest. The scope of the journal includes all aspects of mass, momentum and energy exchange phenomena among different phases such as occur in disperse flows, gas–liquid and liquid–liquid flows, flows in porous media, boiling, granular flows and others. The journal publishes full papers, brief communications and conference announcements.
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