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Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.01 vteřin. 
Application of nuclear techniques in two-phase liquid-solid particles hydrotransport investigations
 Zych, M. ; Hanus, R. ; Vlasák, Pavel ; Petryka, L. ; Jaszczur, M.
The paper presents gamma application to two-phase flow investigation in a vertical pipeline, where the flow of solid particles transported by water was examined by use of both: radiotracers and famma-absorption method. The simultaneous use of two methods allows analyzing of important parameters of solid particles hydrotransport. In the described experiments as solid phase the ceramic models representing natural polymetallic ocean nodules were used. Radiotracers allow to track the movements of selected models, representing specified grain size and the designation of its velocity. However gamma-absorption method enables measurement of average solid-phase velocity. For analysis of electrical signal obtained from scintillation detectors the cross-correlation method has been applied.
Úplný záznam
Radioisotope method of compound flow analysis
 Petryka, L. ; Zych, M. ; Hanus, R. ; Sobota, J. ; Vlasák, Pavel ; Malczewska, B.
The paper presents gamma radiation application to analysis of a multicomponent or multiphase flow. Such information as a selected component content in the mixture transported through pipe is crucial in many industrial or laboratory installations. Properly selected sealed radioactive source and collimators, deliver the photon beam, penetrating cross section of the flow. Detectors mounted at opposite to the source side of the pipe, allow recording of digital signals representing composition of the stream. In the present development of electronics, detectors and computer software, a significant progress in know-how of this field may be observed. The paper describes application of this method to optimization and control of hydrotransport of solid particles and propose monitoring facilitating prevent of a pipe clogging or dangerous oscillations.
Úplný záznam

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