液滴在颗粒层内渗透流动动态过程的激光荧光实验测量

钟哲晗; 卓建坤; 姚强

doi:10.37188/OPE.20202807.1446

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液滴在颗粒层内渗透流动动态过程的激光荧光实验测量

现代应用光学 | 更新时间：2020-08-13

- 液滴在颗粒层内渗透流动动态过程的激光荧光实验测量
- Experimental measurement of the penetration of a droplet into a granular medium using laser and fluorescence
- 光学精密工程 2020年28卷第7期页码：1446-1453
- 作者机构：
  
  1.清华大学热科学与动力工程教育部重点实验室, 北京 100084
  2.新疆大学电气工程学院能源与动力系, 新疆乌鲁木齐 830046
- 作者简介：
  
  [ "钟哲晗(1991-), 男, 福建厦门人, 博士生, 2013年于清华大学获得学士学位, 主要从事液滴、颗粒及燃烧污染物控制方向的研究。E-mail:zzhthu@qq.com" ]
  [ "卓建坤(1975-), 男, 福建莆田人, 博士, 副研究员, 1997年、2000年于浙江大学分别获得学士、硕士学位, 2008年于清华大学获得博士学位, 主要从事生物质及可再生能源多能互补利用等方面的研究。E-mail:zhuojk@tsinghua.edu.cn" ]
- 基金信息：
  
  “十三五”国家重点研发资助项目(No.2018YFB0605000)
- DOI：10.37188/OPE.20202807.1446
  中图分类号： TK11
- 收稿日期：2019-12-16，
  
  修回日期：2020-01-09，
  
  录用日期：2020-1-9，
  
  纸质出版日期：2020-07-15
- 稿件说明：
移动端阅览
钟哲晗, 卓建坤, 姚强. 液滴在颗粒层内渗透流动动态过程的激光荧光实验测量[J]. 光学精密工程, 2020,28(7):1446-1453.

Zhe-han ZHONG, Jian-kun ZHUO, Qiang YAO. Experimental measurement of the penetration of a droplet into a granular medium using laser and fluorescence[J]. Optics and precision engineering, 2020, 28(7): 1446-1453.
钟哲晗, 卓建坤, 姚强. 液滴在颗粒层内渗透流动动态过程的激光荧光实验测量[J]. 光学精密工程, 2020,28(7):1446-1453. DOI： 10.37188/OPE.20202807.1446.

Zhe-han ZHONG, Jian-kun ZHUO, Qiang YAO. Experimental measurement of the penetration of a droplet into a granular medium using laser and fluorescence[J]. Optics and precision engineering, 2020, 28(7): 1446-1453. DOI： 10.37188/OPE.20202807.1446.

摘要

为了实现下落液滴在颗粒层内渗透流动的三维快速测量，本文开发了一种基于激光-荧光-高速相机的光学测量系统，用以拍摄记录不同时刻颗粒层内液体的分布形貌。该系统由三个部分组成，首先，液滴和颗粒层在撞击渗透系统中接触，采用折射率匹配方法减少光学散射；其次，光学信号采集系统拍摄记录颗粒层内液体的形貌分布随时间的变化，通过改变拍摄截面，可以实现准三维测量；最后，在数据处理系统中使用Matlab程序完成对实验数据的分析，可以获得液体在层内不同方向上距离、速度和加速度的时空分布，进一步为流体在颗粒层渗透时的受力、动量和能量变化的动态理论模型的建立和验证提供支撑。实验系统的空间分辨率达到0.02 mm，时间分辨率达到0.5 ms，满足渗透过程测量稳定可靠、高时空分辨率的要求。

Abstract

To analyze the fast penetration of a 3D droplet into a granular medium and its flow

an optical measuring system comprising a laser

fluorescence

and a high-speed camera has been developed. The system consists of three parts:the penetration segment

wherein droplets contact a medium

adding index-matched fluids to reduce light scattering; the optical signal acquisition segment

which captures the liquid morphology in the medium at different conditions and performs a quasi-3D measurement using laser sheets; and the data processing segment

which analyzes experimental data. The moving distance

speed

and acceleration of the droplet in diverse directions at different times are measured to describe such dynamic process. Moreover

the data can support the establishment and verification of the dynamic theory

comprising force

momentum

and energy. The spatial resolution of this system is 0.02 mm

and its time resolution is 0.5 ms. They can address requirements such as real time

strong stabilization

and high spatial and desired time resolutions.

关键词

Keywords

references

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