Velocity measurement of two-phase liquid-gas flow in a horizontal pipeline using gamma densitometry

21st Fluid Mechanics Conference

物理学;力学

Hanus, R.^1 ; Zych, M.^2 ; Petryka, L.^3

Faculty of Electrical and Computer Engineering, Rzeszow University of Technology, Powstancow Warszawy 12, 35-959, Rzeszow, Poland^1

Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059, Krakow, Poland^2

Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059, Krakow, Poland^3

关键词: Average magnitude difference function;    Cross correlation function (CCF);    Difference functions;    Gamma densitometry;    Gamma ray absorption;    Horizontal pipelines;    Radioactive sources;    Scintillation crystals;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/530/1/012042/pdf
DOI  :  10.1088/1742-6596/530/1/012042

学科分类：力学，机械学

来源: IOP

【 摘 要 】

This paper presents application of gamma-ray absorption method to liquid-gas flow investigation in a pipeline. In the described measurement two sealed241Am radioactive sources and probes with NaI(Tl) scintillation crystals have been used. For the analysis of digital signals provided by detectors, a traditional cross-correlation function (CCF), and modified correlation methods based on the quotient of CCF and average magnitude difference function (AMDF), as well as the quotient of CCF, and average square difference function (ASDF) have been proposed. Exemplary results of the mean velocity determination of the gaseous phase transported by a liquid in the water-air mixture flow were demonstrated and the evaluation of its uncertainty have been presented.