Advanced Imaging Techniques for Multiphase Flows Analysis

24th A.I.VE.LA. Annual Meeting

Amoresano, A.^1 ; Langella, G.^1 ; Di Santo, M.^1 ; Iodice, P.^1

University of Naples Federico II, Via Claudio 21, Naples

80125, Italy^1

关键词: Boundary lines;    Digital image;    Fixed threshold;    Frame rate;    Gas-liquid interface;    Liquid Phase;    Numerical techniques;    Time evolutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/882/1/012004/pdf
DOI  :  10.1088/1742-6596/882/1/012004

来源: IOP

【 摘 要 】

Advanced numerical techniques, such as fuzzy logic and neural networks have been applied in this work to digital images acquired on two applications, a centrifugal pump and a stationary spray in order to define, in a stochastic way, the gas-liquid interface evolution. Starting from the numeric matrix representing the image it is possible to characterize geometrical parameters and the time evolution of the jet. The algorithm used works with the fuzzy logic concept to binarize the chromatist of the pixels, depending them, by using the difference of the light scattering for the gas and the liquid phase.. Starting from a primary fixed threshold, the applied technique, can select the 'gas' pixel from the 'liquid' pixel and so it is possible define the first most probably boundary lines of the spray. Acquiring continuously the images, fixing a frame rate, a most fine threshold can be select and, at the limit, the most probably geometrical parameters of the jet can be detected.