Počet záznamů: 1  

Measurement Accuracy of a Mono-fiber Optical Probe in a Bubbly Flow

  1. 1.
    SYSNO ASEP0343074
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevMeasurement Accuracy of a Mono-fiber Optical Probe in a Bubbly Flow
    Tvůrce(i) Vejražka, Jiří (UCHP-M) RID
    Večeř, M. (CZ)
    Orvalho, Sandra (UCHP-M) RID
    Sechet, Ph. (FR)
    Růžička, Marek (UCHP-M) RID
    Cartellier, A. (FR)
    Zdroj.dok.International Journal of Multiphase Flow. - : Elsevier - ISSN 0301-9322
    Roč. 36, č. 7 (2010), s. 533-548
    Poč.str.16 s.
    Jazyk dok.eng - angličtina
    Země vyd.GB - Velká Británie
    Klíč. slovaoptical probe ; bubble-fiber interaction ; void fraction
    Vědní obor RIVCI - Průmyslová chemie a chemické inženýrství
    CEPGA104/07/1110 GA ČR - Grantová agentura ČR
    GP104/06/P287 GA ČR - Grantová agentura ČR
    IAA200720801 GA AV ČR - Akademie věd
    CEZAV0Z40720504 - UCHP-M (2005-2011)
    UT WOS000278693800002
    DOI10.1016/j.ijmultiphaseflow.2010.03.007
    AnotaceThe 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.
    PracovištěÚstav chemických procesů
    KontaktEva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
    Rok sběru2011