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Fast X-ray imaging of cavitating flowsKhlifa, Ilyass ...A new method based on ultra-fast X-ray imaging was developed in this work for the investigation of the dynamics and the structures of complex two-phase flows. In this paper, cavitation was created ... inside a millimetric 2D Venturi-type test section, while seeding particles were injected into the flow. Thanks to the phase-contrast enhancement technique provided by the APS (Advanced Photon Source) synchrotron beam, high definition X-ray images of the complex cavitating flows were obtained. These images contain valuable information about both the liquid and the gaseous phases. By means of image processing, the two phases were separated, and velocity fields of each phase were, therefore, calculated using image cross-correlations. The local vapour volume fractions were also obtained, thanks to the local intensity levels within the recorded images. These simultaneous measurements, provided by this new technique, afford more insight into the structure and the dynamic of two-phase flows as well as the interactions between them, and hence enable to improve our understanding of their behaviour. In the case of cavitating flows inside a Venturi-type test section, the X-ray measurements demonstrate, for the first time, the presence of significant slip velocities between the phases within sheet cavities for both steady and unsteady flow configurations.Source: Experiments in fluids. - ISSN 0723-4864 (Vol. 58, Nov. 2017, str. 1-22)Type of material - article, component part ; adult, seriousPublish date - 2017Language - englishCOBISS.SI-ID - 15738139
Author
Khlifa, Ilyass |
Vabre, Alexandre |
Hočevar, Marko, strojnik, 1972- |
Fezzaa, Kamel |
Fuzier, Sylvie |
Roussette, Olivier |
Coutier-Delgosha, Olivier
Topics
cavitation |
measurements |
x rays |
kavitacija |
meritve |
rentgenski žarki
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Khlifa, Ilyass | ![]() |
Vabre, Alexandre | ![]() |
Hočevar, Marko, strojnik, 1972- | 18836 |
Fezzaa, Kamel | ![]() |
Fuzier, Sylvie | ![]() |
Roussette, Olivier | ![]() |
Coutier-Delgosha, Olivier | ![]() |
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