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水介质中降落球形塑料颗粒与静止气泡的黏附行为

陈露阳 孙志强

陈露阳, 孙志强. 水介质中降落球形塑料颗粒与静止气泡的黏附行为[J]. 北京航空航天大学学报, 2019, 45(8): 1529-1535. doi: 10.13700/j.bh.1001-5965.2018.0706
引用本文: 陈露阳, 孙志强. 水介质中降落球形塑料颗粒与静止气泡的黏附行为[J]. 北京航空航天大学学报, 2019, 45(8): 1529-1535. doi: 10.13700/j.bh.1001-5965.2018.0706
CHEN Luyang, SUN Zhiqiang. Attachment behavior of falling spherical plastic particle on static bubbles in water medium[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(8): 1529-1535. doi: 10.13700/j.bh.1001-5965.2018.0706(in Chinese)
Citation: CHEN Luyang, SUN Zhiqiang. Attachment behavior of falling spherical plastic particle on static bubbles in water medium[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(8): 1529-1535. doi: 10.13700/j.bh.1001-5965.2018.0706(in Chinese)

水介质中降落球形塑料颗粒与静止气泡的黏附行为

doi: 10.13700/j.bh.1001-5965.2018.0706
基金项目: 

国家自然科学基金 51876224

中南大学中央高校基本科研业务费专项资金 2018zzts024

中南大学贵重仪器设备开放共享基金 CSUZC201822

详细信息
    作者简介:

    陈露阳  女, 博士研究生。主要研究方向:多相流测试技术

    孙志强  男, 博士, 教授, 博士生导师。主要研究方向:多相流理论与测试、热设计与传热优化、能源新技术及应用等

    通讯作者:

    孙志强, E-mail: zqsun@csu.edu.cn

  • 中图分类号: TB873;O658.6+

Attachment behavior of falling spherical plastic particle on static bubbles in water medium

Funds: 

National Natural Science Foundation of China 51876224

the Fundamental Research Funds for the Central Universities of Central South University 2018zzts024

Open-End Fund for the Valuable and Precision Instruments of Central South University CSUZC201822

More Information
  • 摘要:

    为了揭示球形塑料颗粒在气泡表面的黏附行为及机理,采用高速摄影仪对自由降落的球形塑料颗粒与固定在水槽中静止气泡的黏附过程进行拍摄,利用图像处理方法提取颗粒黏附过程运动特性曲线及碰撞角与运动时间的关系,研究颗粒碰撞位置、颗粒和气泡直径对黏附行为的影响。实验结果表明:颗粒的黏附主要分为碰撞黏附和滑动黏附,气泡表面的滑动壁面假设与实验值的吻合度较高。此外,通过对实验数据的统计发现,随着碰撞角的增大,感应时间明显增长,但是颗粒陷入气泡表面的时间基本维持在10 ms,颗粒陷入气泡的深度受气泡和颗粒尺寸的共同影响,约占气泡与颗粒直径之和的2%。

     

  • 图 1  颗粒黏附行为观测实验系统示意图

    Figure 1.  Schematic of experimental system for observing particle attachment behavior

    图 2  PMMA颗粒表面SEM扫描结果

    Figure 2.  SEM micrographs of PMMA particles' surface

    图 3  气泡表面的颗粒运动轨迹追踪

    Figure 3.  Tracking of particle trajectory on bubble surface

    图 4  图像识别结果

    Figure 4.  Image recognition result

    图 5  颗粒在气泡表面的滑动黏附

    Figure 5.  Sliding attachment of particle on bubble surface

    图 6  滑动黏附中的颗粒-气泡中心距变化

    Figure 6.  Variation of center distance between particle and bubble during sliding attachment

    图 7  滑动黏附中颗粒的运动偏转角

    Figure 7.  Particle movement deflection angle during sliding attachment

    图 8  颗粒在气泡表面的碰撞黏附

    Figure 8.  Collision attachment of particle on bubble surface

    图 9  碰撞黏附中的颗粒-气泡中心距变化

    Figure 9.  Variation of center distance between particle and bubble during collision attachment

    图 10  碰撞黏附中颗粒的运动偏转角

    Figure 10.  Particle movement deflection angle during collision attachment

    图 11  陷入深度与陷入时长

    Figure 11.  Depth and time of "jump in" phenomenon

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出版历程
  • 收稿日期:  2018-11-30
  • 录用日期:  2019-01-23
  • 网络出版日期:  2019-08-20

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