| 引用本文: | 陈安然,李向东,周兰伟,等.液压水锤效应引起液体喷溅特性及其影响因素试验研究.[J].国防科技大学学报,2021,43(5):144-152.[点击复制] |
| CHEN Anran,LI Xiangdong,ZHOU Lanwei,et al.Experimental study on the characteristics and influencing factors of liquid spurt caused by hydrodynamic ram[J].Journal of National University of Defense Technology,2021,43(5):144-152[点击复制] |
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| 液压水锤效应引起液体喷溅特性及其影响因素试验研究 |
| 陈安然,李向东,周兰伟,纪杨子燚 |
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(南京理工大学 机械工程学院, 江苏 南京 210094)
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| 摘要: |
| 为研究液压水锤效应引起的液体喷溅特性及其影响因素,进行了高速破片撞击充液容器的试验,测试了液体内的空腔振荡特性、压力分布特性和容器外的液体喷溅特性。试验结果表明:液压水锤效应引起的液体喷溅有两个不同的阶段。第一个阶段发生在空腔生长到最大体积后的400～700 μs内,喷溅液体的头部呈箭状；在第二个阶段出现多次形状相似的脉动喷溅,且单次脉动均发生在每次空腔溃灭之后,喷溅液体具有伞状头部与线状尾部。液体内的压力和侵彻孔的形态共同影响液体的喷溅速度,相对喷溅速度与破片的撞击速度成反比。喷溅液体在运动过程中存在速度波动,且随着喷溅次数的增加,液体喷溅速度逐渐下降,速度拐点出现的位置逐渐接近侵彻孔。 |
| 关键词: 液压水锤 充液容器 高速撞击 液体喷溅 |
| DOI：10.11887/j.cn.202105017 |
| 投稿日期：2020-04-21 |
| 基金项目:国家自然科学基金资助项目(11572159)；国防科技基础加强计划技术领域基金资助项目(2020-JCJQ-JJ-401)；江苏省研究生科研与实践创新计划资助项目(KYCX19_0329,KYCX19_0330) |
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| Experimental study on the characteristics and influencing factors of liquid spurt caused by hydrodynamic ram |
| CHEN Anran, LI Xiangdong, ZHOU Lanwei, JI Yangziyi |
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(School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
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| Abstract: |
| In order to study the characteristics of liquid spurt caused by the hydrodynamic ram and its influencing factors, experiments in which high-velocity fragment impacts the liquid-filled container have been conducted. The characteristics of cavity oscillation in the container, the pressure distribution and the liquid spurt outside the container were tested. Experimental results show that there are two different phases of the liquid spurt. The first phase occurs within 400～700 μs after the cavity grows to its maximum volume and the liquid spurt has an arrow-shaped head. In the second phase, a number of similar pulsating spurt occurs, and each single pulsating occurs after each time of the cavity collapse. The liquid spurt has an umbrella-shaped head with a linear-shape tail. The pressure in the liquid and the shape of penetration orifice affects the velocity of the liquid spurt. The relative velocity of liquid spurt decreases in inverse proportion with the increase of the fragment impact velocity. The velocity of the liquid spurt fluctuates in the motivation. The velocity of the liquid spurt decreases and the location of the inflection point of the velocity can be closer to the penetration orifice with the increase of the number of spurts. |
| Keywords: hydrodynamic ram liquid-filled container high-velocity impact liquid spurt |
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