Performance evaluation of the online droplet size measurement structure for tubular atomization mixers

KONG Lingzhen; YANG Yang; CHEN Jiaqing; SUN Huan; XIE Tong; ZHANG Chengkai; JIANG Yingming

doi:10.11949/0438-1157.20251413

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Performance evaluation of the online droplet size measurement structure for tubular atomization mixers

Fluid dynamics and transport phenomena | 更新时间：2026-08-21

- Performance evaluation of the online droplet size measurement structure for tubular atomization mixers
- CIESC Journal Vol. 77, Issue 7, Pages: 3840-3851(2026)
- 作者机构：
  
  1.北京石油化工学院机械工程学院，北京 102617
  2.深水油气管线关键技术与装备北京市重点实验室，北京 102617
  3.北方工业大学机械与材料工程学院，北京 100144
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20251413
  CLC： TQ 051.7
- Received：15 December 2025，
  
  Revised：2026-04-23，
  
  Online First：20 August 2026，
  
  Published：25 July 2026
- 稿件说明：
移动端阅览
孔令真, 杨洋, 陈家庆, 孙欢, 谢彤, 张成凯, 蒋英明. 管式雾化混合器粒径在线测量结构的性能评价[J]. 化工学报, 2026, 77(7): 3840-3851

KONG Lingzhen, YANG Yang, CHEN Jiaqing, SUN Huan, XIE Tong, ZHANG Chengkai, JIANG Yingming. Performance evaluation of the online droplet size measurement structure for tubular atomization mixers[J]. CIESC Journal, 2026, 77(7): 3840-3851
孔令真, 杨洋, 陈家庆, 孙欢, 谢彤, 张成凯, 蒋英明. 管式雾化混合器粒径在线测量结构的性能评价[J]. 化工学报, 2026, 77(7): 3840-3851 DOI： 10.11949/0438-1157.20251413.

KONG Lingzhen, YANG Yang, CHEN Jiaqing, SUN Huan, XIE Tong, ZHANG Chengkai, JIANG Yingming. Performance evaluation of the online droplet size measurement structure for tubular atomization mixers[J]. CIESC Journal, 2026, 77(7): 3840-3851 DOI： 10.11949/0438-1157.20251413.

摘要

在线测量雾化液滴粒径是评价管式雾化混合器工作性能的重要手段，但因雾化液滴随气流夹带扩散黏附于透明观测窗内壁而影响测量精度。提出一种基于“环缝吹扫视窗+环隙排液套筒”的雾化液滴粒径在线测量结构，使用少量吹扫气在观测窗前形成阻隔液滴的气幕，避免液滴黏附干扰测量精度。结合计算流体动力学（CFD）数值模拟和实验测试，评价分析了主管道气量、吹扫气量和持续测量时间等参数，对粒径在线测量组件内速度场分布及测量准确性的影响规律。结果表明，在液气比0.2 L/m

条件下，主管道气量在90~150 m

/h变化时，在线测量与对空测量测得的雾化液滴粒径

绝对差值

在5 μm以内，雾化效率差值在1%以内；综合流场分布及

绝对差值

分析，确定最佳环缝吹扫气量应占主管道气量的0.58%~1.00%；持续5 min在线测量测得的

标准差

均小于1，粒度分布基本不变，表现出良好的准确性和稳定性。

Abstract

Online measurement of atomized droplet size is an important method for evaluating the performance of tubular atomization mixers. However

the accuracy is affected by the adhesion of atomized droplets to the inner wall of the transparent observation window due to entrainment and diffusion with the airflow. This paper introduces an online measurement structure for atomized droplet size based on a "ring gap purge transparent window and annular

drainage sleeve". This design utilizes a small amount of purge gas flow to create an air curtain in front of the observation window

which prevents droplet adhesion and measurement interference. Combined with computational fluid dynamics (CFD) numerical simulations and experiment testing

this research evaluated the effects of main pipeline gas flow rate

purge gas flow rate

and measurement duration on the velocity field distribution within the online droplet sizing assembly and on measurement accuracy. The research results show that under the conditions of a liquid-gas ratio of 0.2 L/m

when the gas volume of the main pipeline varies between 90 and 150 m

the absolute difference

of the atomized droplet size

by online measurement and unblocked measurement is within 5 μm

and the difference in atomization efficiency stays below 1%. A comprehensive analysis of the flow field distribution and

revealed that the optimal purge gas flow in annular gap should constitute 0.58%—1.00% of the main pipeline gas flow. During 5 min of continuous online measurement

the standard deviation

of the measured

values is consistently less than 1. Meanwhile

the volume distribution proportion remains basically unchanged

which demonstrates that the measurement method has excellent accuracy and stability.

关键词

Keywords

references

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