Measurement and analysis of droplet parameters in annular mist flow based on image method

被引：0
|
作者：
Ding H. [1 ]
Liu X. [1 ]
Li J. [2 ]
Sun H. [1 ]
Liang Z. [1 ]
机构：
[1] School of Electrical and Information Engineering, Tianjin University, Tianjin
[2] College Electronic Information and Automation, Civil Aviation University of China, Tianjin
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 12期
关键词：
Annular mist flow; Atomization; Droplet size and velocity; Imaging method analysis; Particle measurement;
D O I：
10.16085/j.issn.1000-6613.2021-1388
中图分类号：
学科分类号：
摘要：
Annular mist flow is a kind of flow pattern widely existing in the field of petrochemical industry, and the measurement of its internal flow field measurement is of great significance. Combined with optical image method and high-speed photography technology, the atomization characteristics of the impaction-pin nozzle were measured. On this basis, the characteristics of the entrainment droplets in the Annular mist flow based on atomization mixing were studied. The spray morphology was visualized by high-speed photography, and the morphological changes were described visually. The single-frame single-exposure method was used to extract the distributions of droplet size and velocity. It was found that the droplet velocity decreases with the increase of the axial distance, and the droplet velocity reaches a peak at about 10mm in the radial position at the same axial distance. The results also showed that the Sauter mean diameter (SMD) increased with the increase of nozzle aperture, and was negatively correlated with the mass flow rate of liquid phase and the pressure drop. In addition, under the same gas pressure condition, SMD decreased with the increase of gas flow rate, while it increased with the increase of gas pressure at the same gas flow rate. Finally, the dimensional analysis based SMD prediction model of annular mist flow droplets was established by introducing the interphase slip and pressure coefficient, with gas Weber number and liquid Reynolds number as the main influencing parameters, and the MAPE is 11.4672%. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：6460 / 6468
页数：8
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