Simulation on Vertical Water-entry of Concave-nosed Projectile

被引：0

作者：

Huang Z. ^{[1
]}

Luo Y. ^{[1
,2
]}

Chen Z. ^{[1
]}

Hou Y. ^{[1
]}

Tang C. ^{[1
]}

机构：

[1] National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu

[2] Aerospace Power Measurement and Contorl Technology Research Institute, Xi'an, 710025, Shaanxi

来源：

| 1600年 / China Ordnance Society卷 / 41期

关键词：

Ballistic characteristic; Cavity; Concave-nosed projectile; Coupling; Vertical water entry;

D O I：

10.3969/j.issn.1000-1093.2020.S1.019

中图分类号：

学科分类号：

摘要：

Concave-nosed projectile is a kind of structure with a part of hollow cavity. In the process of first impacting the free liquid surface by the concave part of projectile nose, the gas-liquid two-phase coupling in the cavity forms complex solid-liquid-gas three-phase motion with the projectile. In order to study the influences of nose shape and internal cavity of concave-nosed projectile on the characteristics of water-entry cavitation and trajectory under the condition of low-speed vertical water-entry, the numerical simulation method is used to study the change of cavitation flow during the water-entry process of concave-nosed projectile. The results show that the water-entry cavities of flat-nosed, concave-nosed and hollow projectiles are obvious different. The regularity of energy dissipation degree of each projectile at the moment of water entry and the changing trend of acceleration, drag coefficient and velocity after water entry were obtained. During the opening stage of flat- and concave-nosed projectiles, the nose pressure increases sharply, while the nose pressure decreases in the formation stage and then increases sharply in the closing stage of surface. © 2020, Editorial Board of Acta Armamentarii. All right reserved.

引用

页码：128 / 134

页数：6

共 11 条

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