[1]施红辉,周素云,王 昀,等.攻角变化超空泡射弹冲击水面的流体物理现象研究[J].弹道学报,2019,(01):68.[doi:10.12115/j.issn.1004-499X(2019)01-012]
 SHI Honghui,ZHOU Suyun,WANG Yun,et al.Study on Fluid Characteristics During Supercavity ProjectileImpacting Water Surface at Different Attack Angles[J].Journal Of Ballistics,2019,(01):68.[doi:10.12115/j.issn.1004-499X(2019)01-012]
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攻角变化超空泡射弹冲击水面的流体物理现象研究()
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《弹道学报》[ISSN:1004-499x/CN:32-1343/TJ]

卷:
期数:
2019年01期
页码:
68
栏目:
出版日期:
2019-03-30

文章信息/Info

Title:
Study on Fluid Characteristics During Supercavity ProjectileImpacting Water Surface at Different Attack Angles
文章编号:
1004-499X(2019)01-0068-07
作者:
施红辉1周素云2王 昀1鲁林旺1
1.浙江理工大学 机械与自动控制学院,浙江 杭州 310018; 2.杭州市城乡建设设计院有限公司,浙江 杭州 310004
Author(s):
SHI Honghui1ZHOU Suyun2WANG Yun1LU Linwang1
1.College of Mechanical Engineering and Automation,Zhejiang Sci-Tech University,Hangzhou 310018,China; 2.Hangzhou Urban & Rural Construction Design Institute Co.,Ltd.,Hangzhou 310004,China
关键词:
射弹 爆炸力学 超空泡 自由面
Keywords:
projectile explosion mechanics supercavity free surface
分类号:
O382.1
DOI:
10.12115/j.issn.1004-499X(2019)01-012
文献标志码:
A
摘要:
在自行设计制作的实验装置上,用高速摄影机观察了超空泡射弹以57°~80°攻角倾斜地冲击水面及出水过程的流场,分析研究了相关的物理参数。实验结果表明,随着超空泡射弹接近水面,倾斜运动的射弹超空泡的头部形状出现了向水面的偏斜,即关于圆柱形物体轴线不对称; 数值计算结果证实了这种偏斜。分析结果表明,该现象是空泡下部压力大于上部压力造成的。进行了水平超空泡射弹和水面相互作用(90°攻角)的实验,发现了空泡向水面的偏斜和水面的抬升,先导表面波的形成,在自由面上方生成的水鳍及其破裂,自然超空泡向通气超空泡的转换等。基于Logvinovich的半经验公式,比较了测得的空泡形状,结果表明,在弹体头部附近空泡形状出现偏斜的现象。
Abstract:
Based on the self-designed experimental device,the flow field of a supercavity projectile obliquely impacting water surface at 57°~80° attack angle was visualized by using a high-speed camera,and the relevant parameters were studied. The experiment results show that,as the supercavity projectile approaches the surface,the supercavity shape tilts to the surface of the water,namely,the cavity is no longer axisymmetric. Numerical simulation confirms the tilting. The analysis result shows that the pressure under the cavity is greater than that upon the cavity,which causes the tilting. The horizontal supercavity projectile interacting with water surface under attack angle of 90° was tested. The supercavity tilting to water surface was found,as well as the large expansion of the cavity diameter,the formation of pilot suface wave,break-up of the water fin on the risen free surface,transition from natural supercavity to ventilated supercavity. Based on Logvinovich’s semi-empirical formula,the measured cavity contours were compared. The result shows that the deflection of davity shape appears around projectile head.

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相似文献/References:

[1]易文俊王中原熊天红,等.水下射弹典型空化器的超空泡形态特性分析[J].弹道学报,2008,(02):103.
 YI Wen jun,WANG Zhong yuan,XIONG Tian hong,et al.Analysis of Supercavity Shape for Underwater Projectile With Typical Cavitator[J].Journal Of Ballistics,2008,(01):103.

备注/Memo

备注/Memo:
收稿日期:2018-08-15
基金项目:浙江省自然科学基金项目(LY16A020003)
作者简介:施红辉(1962- ),男,教授,研究方向为超空泡海战武器与气泡动力学,流体界面 RM不稳定性,新型脉冲式消防器。E-mail:hhshi@zstu.edu.cn。
通信作者:鲁林旺(1991- ),男,硕士研究生,研究方向为超空泡流动。E-mail:1198945688@qq.com。
更新日期/Last Update: 2019-03-10