Faculty, Staff and Student Publications
Language
English
Publication Date
2-8-2023
Journal
Sensors
DOI
10.3390/s23041907
PMID
36850503
PMCID
PMC9967637
PubMedCentral® Posted Date
2-8-2023
PubMedCentral® Full Text Version
Post-print
Abstract
In this work, a visualization experiment for rectangular channels was carried out to explore gas-liquid two-phase flow characteristics. Typical flow patterns, including bubble, elastic and mixed flows, were captured by direct imaging technology and the corresponding measurements with fluctuation characteristics were recorded by using an electrical conductivity sensor. Time-domain and frequency-domain characteristics of the corresponding electrical conductivity measurements of each flow pattern were analyzed with a probability density function and a power spectral density curve. The results showed that the feature vectors can be constructed to reflect the time-frequency characteristics of conductivity measurements successfully by introducing the quantized characteristic parameters, including the maximum power of the frequency, the standard deviation of the power spectral density, and the range of the power distribution. Furthermore, the overall recognition rate of the four flow patterns measured by the method was 93.33% based on the support vector machine, and the intelligent two-phase flow-pattern identification method can provide a new technical support for the online recognition of gas-liquid two-phase flow patterns in rectangular channels. It may thus be concluded that this method should be of great significance to ensure the safe and efficient operation of relevant industrial production systems.
Keywords
gas–liquid, flow pattern, rectangular channel, conductivity, support vector machine
Published Open-Access
yes
Recommended Citation
Yang, Kai; Liu, Jiajia; Wang, Min; et al., "Identifying Flow Patterns in a Narrow Channel via Feature Extraction of Conductivity Measurements with a Support Vector Machine" (2023). Faculty, Staff and Student Publications. 772.
https://digitalcommons.library.tmc.edu/uthshis_docs/772