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Measurement Accuracy of a Mono-fiber Optical Probe in a Bubbly Flow
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SYSNO ASEP 0343074 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Measurement Accuracy of a Mono-fiber Optical Probe in a Bubbly Flow Tvůrce(i) Vejražka, Jiří (UCHP-M) RID, ORCID, SAI
Večeř, M. (CZ)
Orvalho, Sandra (UCHP-M) RID, ORCID, SAI
Sechet, Ph. (FR)
Růžička, Marek (UCHP-M) RID, ORCID, SAI
Cartellier, A. (FR)Zdroj.dok. International Journal of Multiphase Flow. - : Elsevier - ISSN 0301-9322
Roč. 36, č. 7 (2010), s. 533-548Poč.str. 16 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova optical probe ; bubble-fiber interaction ; void fraction Vědní obor RIV CI - Průmyslová chemie a chemické inženýrství CEP GA104/07/1110 GA ČR - Grantová agentura ČR GP104/06/P287 GA ČR - Grantová agentura ČR IAA200720801 GA AV ČR - Akademie věd CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000278693800002 DOI 10.1016/j.ijmultiphaseflow.2010.03.007 Anotace The measurement accuracy of a mono-fiber optical probe is studied experimentally using isolated bubbles rising freely in a still liquid. The dwell time of the probe tip within the gas phase, which is obtained from both the optical probe signal and high-speed visualization, is compared with the dwell time expected for a non-perturbed bubble. The measurement error results mainly from the intrusive nature of the optical probe, which modifies the behavior of the bubble when it comes into contact with the probe tip. The measured dwell time therefore differs from its ideal value that would be found with an unperturbed bubble. For a wetting liquid, the interaction increases the dwell time if the bubble is pierced near its pole, and shortens it for piercing near the equator. It is shown that the error can be correlated with a modified Weber number, and this correlation is helpful for sensor selection and for uncertainty estimate. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2011
Počet záznamů: 1