Chemical Industry and Engineering Progress ›› 2024, Vol. 43 ›› Issue (2): 743-751.DOI: 10.16085/j.issn.1000-6613.2023-1379

• Column: multiphase flow test • Previous Articles     Next Articles

Liquid film thickness distribution detection based on transverse shear interferometry system

SHENG Wen1,2(), YU Bo1,2, GUO Han1,2, ZHOU Huaichun1,2()   

  1. 1.School of Low Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
    2.Jiangsu Smart Energy Technol and Equipment Engineering Research Center, Xuzhou 221116, Jiangsu, China
  • Received:2023-08-11 Revised:2023-10-25 Online:2024-03-07 Published:2024-02-25
  • Contact: ZHOU Huaichun

基于横向剪切干涉系统的液膜厚度分布检测

盛稳1,2(), 余波1,2, 郭晗1,2, 周怀春1,2()   

  1. 1.中国矿业大学低碳能源与动力工程学院,江苏 徐州 221116
    2.江苏省智慧能源技术及 装备工程研究中心,江苏 徐州 221116
  • 通讯作者: 周怀春
  • 作者简介:盛稳(1999—),男,博士研究生,研究方向为流体力学。E-mail:shengwen@cumt.edu.cn
  • 基金资助:
    国家自然科学基金(51827808)

Abstract:

Measuring the thickness of liquid films has important applications in many scientific and engineering fields. In this paper, based on the transverse shear interferometry technique, the thickness distribution and time evolution of the triangular and rectangular vertical free-plane liquid films were investigated. The streak-tracking algorithm was used to process the interference images of the liquid film taken by a camera. Experimental results showed that the thickness of the triangular liquid film ranged 0.98—9.37μm, and the thickness of the rectangular liquid film ranged 0.1—13μm. Under the influence of gravity, the thickness of the liquid film gradually increased from top to bottom, and the thickness of the liquid film was uniformly distributed in the horizontal direction. With the passage of time, the overall thickness of the liquid film decreased gradually due to gravity drainage. The thickness of the weakest point at the top reached the minimum value of 0.08μm before the overall rupture of the rectangular liquid film. Further analysis of the rectangular liquid film reveals that the maximum volume of the film was 2.66mm3 and the maximum volumetric flow rate was 0.28mm3/s throughout the drainage process. In addition, the visualization of the surface flow field of the liquid film could be realized by the distribution change of the interference fringes, which provided a new research method for the study of the microscopic surface flow field of the liquid film.

Key words: lateral shearing interferometry, liquid film thickness, drainage, two-phase flow, optical measurement

摘要:

测量液体薄膜的厚度在众多科学和工程领域中都具有重要的应用价值。本文基于横向剪切干涉技术,通过条纹追踪算法对相机拍摄得到的液膜干涉图像进行处理,研究了三角形与矩形竖直自由平面液膜的厚度分布及时间演变。实验结果表明,三角形液膜厚度范围为0.98~9.37μm,矩形液膜厚度范围为0.1~13μm。受重力影响,液膜厚度从顶部到底部逐渐增大,而在水平方向上液膜厚度分布均匀。随着时间的推移,重力排液导致液膜整体厚度逐步减小,顶部最薄弱处厚度率先到达最小值0.08μm后液膜整体破裂。进一步对矩形液膜进行分析,整个排液过程中液膜最大体积为2.66mm3,最大体积流量为0.28mm3/s。此外,通过干涉条纹的分布变化可实现液膜表面流场可视化,为液膜微观表面流场研究提供了新的研究方法。

关键词: 横向剪切干涉, 液膜厚度, 排液, 两相流, 光学测量

CLC Number: 

京ICP备12046843号-2;京公网安备 11010102001994号
Copyright © Chemical Industry and Engineering Progress, All Rights Reserved.
E-mail: hgjz@cip.com.cn
Powered by Beijing Magtech Co. Ltd