球体入水空泡演变和运动特性影响试验研究

王恒 孙铁志 路中磊 张桂勇 宗智

王恒, 孙铁志, 路中磊, 张桂勇, 宗智. 球体入水空泡演变和运动特性影响试验研究[J]. 爆炸与冲击, 2019, 39(12): 123901. doi: 10.11883/bzycj-2018-0415
引用本文: 王恒, 孙铁志, 路中磊, 张桂勇, 宗智. 球体入水空泡演变和运动特性影响试验研究[J]. 爆炸与冲击, 2019, 39(12): 123901. doi: 10.11883/bzycj-2018-0415
WANG Heng, SUN Tiezhi, LU Zhonglei, ZHANG Guiyong, ZONG Zhi. Experimental study on the cavity evolution and motion characteristics of spheres into water[J]. Explosion And Shock Waves, 2019, 39(12): 123901. doi: 10.11883/bzycj-2018-0415
Citation: WANG Heng, SUN Tiezhi, LU Zhonglei, ZHANG Guiyong, ZONG Zhi. Experimental study on the cavity evolution and motion characteristics of spheres into water[J]. Explosion And Shock Waves, 2019, 39(12): 123901. doi: 10.11883/bzycj-2018-0415

球体入水空泡演变和运动特性影响试验研究

doi: 10.11883/bzycj-2018-0415
基金项目: 国家自然科学基金(51709042,51579042);中国博士后科学基金(2018M631791);青年千人项目(D1007001);中央高校基本科研业务费专项资金(DUT18RC(4)018,DUT2017TB05);辽宁省自然科学基金(20180550619)
详细信息
    作者简介:

    王 恒(1996- ),男,硕士研究生,wangheng96@mail.dlut.edu.cn

    通讯作者:

    孙铁志(1986- ),男,博士,讲师,suntiezhi@dlut.edu.cn

  • 中图分类号: O352

Experimental study on the cavity evolution and motion characteristics of spheres into water

  • 摘要: 为了探究表面粗糙度对球体入水空泡演变及运动特性的影响,基于实验室开放水槽试验系统,选取了5种表面粗糙度的球体,使用高速摄像机记录入水过程,并得到了各个球体的入水空泡、喷溅的演变过程以及运动特性的变化。发现入水空泡和喷溅的闭合都会给球体一个负方向的加速度。通过对比不同表面粗糙度球体的位移、速度、加速度曲线,发现表面粗糙度最大的球体在砰击阶段结束后,其速度会明显小于其他球体,并且表面粗糙度对球体运动的影响主要体现在入水早期。分析了上述各球体的入水空泡闭合后,与自由面相连的空泡的收缩运动,发现其收缩速度和加速度曲线均会出现极大值点,呈现出球体表面粗糙度越大出现得越早的趋势。
  • 图  1  试验装置示意图

    Figure  1.  Schematic diagram of experimental setup

    图  2  球体入水过程空泡形态演变

    Figure  2.  Cavity evolution during the water-entry process of the sphere

    图  3  球体下落的速度和加速度变化

    Figure  3.  Drop velocity and acceleration of the sphere varying with time

    图  4  不同表面粗糙度球体的入水过程空泡形态对比

    Figure  4.  Comparisons of the cavity shapes in the water-entry process among the spheres with different surface roughnesses

    图  5  带有纳米涂层的球体入水产生的空泡[6]

    Figure  5.  The cavity produced by a sphere with a nanometric coating after water-entry[6]

    图  6  不同表面粗糙度球体入水过程的运动特性

    Figure  6.  Kinetic characteristics of the spheres with different surface roughnesses during the water-entry processes

    图  7  空泡收缩过程运动特征量定义

    Figure  7.  Definition of the motion parameters during the shrinking process of the cavity

    图  8  空泡收缩的运动特征量

    Figure  8.  Motion parameters during the shrinking processes of the cavities

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出版历程
  • 收稿日期:  2018-10-29
  • 修回日期:  2019-02-19
  • 网络出版日期:  2019-11-25
  • 刊出日期:  2019-12-01

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