Radiometric methods in the measurement of particle-laden flows

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F17%3A00478188" target="_blank" >RIV/67985874:_____/17:00478188 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.powtec.2017.06.019" target="_blank" >http://dx.doi.org/10.1016/j.powtec.2017.06.019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.powtec.2017.06.019" target="_blank" >10.1016/j.powtec.2017.06.019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Radiometric methods in the measurement of particle-laden flows

Popis výsledku v původním jazyce

The article discusses a study on hydrotransport of solid particles (ceramic models of polymetallic nodules) in a vertical pipeline using two different radioisotope methods: tracer and gamma-ray absorption. The radiotracer method makes it possible to determine the velocity of selected solid particles representing specified size fractions while the absorption method enables measurement of mean transport velocity of the entire dispersed phase. The measurements were performed with the use of NaI(Tl) scintillation detectors, sealed linear sources of radiation Am-241 with the energy of 59.54 keV and isotope Tc-99m with gamma radiation energy of 140.51 keV. The experiments were carried out in a pipeline with an internal diameter of 150 mm, for three different water velocities in the range of 1.5-3.6 m/s and three different sizes of ceramic models with size up to 60 mm. Analyses of the detector signals, in measurements based on both tracer and absorption technique, applied cross-correlation function (CCF). It was shown that with the same water velocity different fractions of solid particles have moved with different velocities and the lowest velocities were obtained for the particles with the largest diameters. This enabled interpretation of the CCF in absorption measurements as a distribution of possible interval times for the specific fractions of conveyed particles. (C) 2017 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Radiometric methods in the measurement of particle-laden flows

Popis výsledku anglicky

The article discusses a study on hydrotransport of solid particles (ceramic models of polymetallic nodules) in a vertical pipeline using two different radioisotope methods: tracer and gamma-ray absorption. The radiotracer method makes it possible to determine the velocity of selected solid particles representing specified size fractions while the absorption method enables measurement of mean transport velocity of the entire dispersed phase. The measurements were performed with the use of NaI(Tl) scintillation detectors, sealed linear sources of radiation Am-241 with the energy of 59.54 keV and isotope Tc-99m with gamma radiation energy of 140.51 keV. The experiments were carried out in a pipeline with an internal diameter of 150 mm, for three different water velocities in the range of 1.5-3.6 m/s and three different sizes of ceramic models with size up to 60 mm. Analyses of the detector signals, in measurements based on both tracer and absorption technique, applied cross-correlation function (CCF). It was shown that with the same water velocity different fractions of solid particles have moved with different velocities and the lowest velocities were obtained for the particles with the largest diameters. This enabled interpretation of the CCF in absorption measurements as a distribution of possible interval times for the specific fractions of conveyed particles. (C) 2017 Elsevier B.V. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Powder Technology

ISSN

0032-5910

e-ISSN

—

Svazek periodika

318

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

491-500

Kód UT WoS článku

000407183500050

EID výsledku v databázi Scopus

2-s2.0-85020850539