4.7 Article

Droplet Size and Velocity Measurement in Annular Flow by Fiber Optical Reflectometer

期刊

IEEE SENSORS JOURNAL
卷 23, 期 21, 页码 26031-26046

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2023.3318011

关键词

Annular flow; droplet size; droplet velocity; fiber optical reflectometer (FOR) technique

向作者/读者索取更多资源

The characteristics of droplets in annular flow are crucial for the study of heat and momentum transfer between gas and liquid phases. A novel fiber optical reflectometer (FOR) technique is developed to accurately measure droplet size and velocity in horizontal annular flow. Experimentation conducted under various conditions revealed that the entrainment of liquid droplets significantly increases with higher gas and liquid flow rates. Smaller droplets tend to have higher velocities and a wider velocity distribution, while larger droplets have narrower and lower velocity distribution. The distributions of droplet size and velocity are dependent on the gas and liquid velocities.
The characteristics of droplet in annular flow play an important role in the study of heat and momentum transfer between gas and liquid phases. A novel fiber optical reflectometer (FOR) technique is developed for the measurement of droplet size and velocity in horizontal annular flow. The experiment is conducted under 32 conditions in a duct with an inner diameter of 50 mm, with the superficial gas velocity ranging from 15 to 24 m/s, and the superficial liquid velocity ranging from 0.04 to 0.35 m/s, which expands the range of liquid velocities compared to previous reports. First, the differential method and wavelet synchrosqueezed transform are proposed to ensure accurate identification of droplet parameters. Subsequently, the local droplet frequency, droplet fraction, droplet size, and velocity in annular flow are measured by FOR technique. The results indicate that the entrainment of liquid droplets increases significantly with the increase of gas and liquid flow rates. For small droplets in annular flow, they tend to move at higher velocities and have a wide range of velocity distribution, while larger droplets always have narrower and lower velocity distribution. Simultaneously, the distributions of droplet size and velocity depend on the gas and liquid velocities. Moreover, four typical empirical correlations are used to evaluate the measured droplet Sauter mean diameters, and a new correlation is proposed to predict droplet size in the center of annular flow.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据