化工进展2024，Vol.43Issue(2)：667-679,13.DOI:10.16085/j.issn.1000-6613.2023-1339
超音速旋流分离器湿气出口段液膜测量
Analysis of liquid film measurement in the wet gas outlet section of supersonic swirling separator
摘要
Abstract
As a new type of multiphase flow separation technology,supersonic swirling separation technology has a good application prospect in the field of natural gas dehydration and hydrocarbon removal.Liquid film characteristics in supersonic separators have a significant impact on separation performance.Therefore,the liquid film characteristics of its wet gas outlet was taken as research object,and a set of FPC conductive liquid film thickness measurement system was developed,and a calibration device was designed to obtain the actual output characteristics of the sensor.On the basis,an experimental tube section was constructed and gas-liquid two-phase separation experiments were carried out to investigate the effects of inlet liquid content and back pressure ratio on the liquid film thickness at the wet gas outlet of the supersonic separator.The calibration results showed that the sensor had high sensitivity at the liquid film thickness below 500μm,and the fitting error was within±5%.A bimodal distribution of the liquid film thickness with a base layer thickness of about 70μm was analyzed statistically in the time domain.There was a significant difference in the trend of energy distribution between the 2nd and 3rd frequency bands after wavelet packet decomposition and the other frequency bands in the frequency domain,whereby the original signal was sequentially reconstructed,subjected to local mean decomposition,solved for approximate entropy and clustered.The liquid film fluctuation increased with increasing liquid content,and the approximate entropy can be clustered into three classes corresponding to three flow patterns.Last,the liquid film disturbance wave velocity was analyzed by using the cross-correlation algorithm,and both the flow direction component and the circumferential direction component showed an exponential growth trend with the increase of liquid content,and the flow direction component and its RMSE ranged from 84.7mm/s to 339.0mm/s and 1.15mm/s to 4.51mm/s,respectively,and the circumferential direction component and its RMSE ranged from 54.8mm/s to 186.4mm/s and 1.20mm/s to 3.38mm/s.关键词
超音速分离器/FPC电导式液膜传感器/液膜特征/小波包变换/局部均值分解Key words
supersonic swirling separator/FPC conductive liquid film sensor/liquid film feature/continuous wavelet transform(CWT)/local mean decomposition(LMD)分类
信息技术与安全科学引用本文复制引用
丁红兵,张盼盼,陈政奇,王世伟,梁真馨,孙宏军..超音速旋流分离器湿气出口段液膜测量[J].化工进展,2024,43(2):667-679,13.基金项目
国家自然科学基金(52276159,51876143). （52276159,51876143）
