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Wakes and secondary structures past stator wheel in test turbine VT-400 observed by PIV
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SYSNO ASEP 0582351 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Wakes and secondary structures past stator wheel in test turbine VT-400 observed by PIV Tvůrce(i) Duda, D. (CZ)
Klimko, M. (CZ)
Milčák, P. (CZ)
Jeřábek, M. (CZ)
Uruba, Václav (UT-L) RID, ORCID
Yanovych, V. (CZ)
Žitek, P. (CZ)Zdroj.dok. European Journal of Mechanics B-Fluids. - : Elsevier - ISSN 0997-7546
Roč. 105, May-June (2024), s. 151-163Poč.str. 13 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Particle image velocimetry ; Turbine ; Secondary vortices ; Stator wake ; Vortex identification algorithm Vědní obor RIV BK - Mechanika tekutin Obor OECD Applied mechanics Způsob publikování Open access Institucionální podpora UT-L - RVO:61388998 UT WOS 001172246600001 EID SCOPUS 85183457748 DOI 10.1016/j.euromechflu.2024.01.008 Anotace Flow inside the axial test turbine VT-400 is measured by using a standard methodology of Particle Image Velocimetry (PIV). The studied area lies between the stator and rotor wheel in meridional plane. This area covers both: the regular flow near hub and the endwall secondary structures as well. Regular structure of wakes and jets past stator blades is observed in terms of mean velocities and turbulence intensity. The fluctuations are close to isotropy and the energy distribution across length-scales exhibits almost Kolmogorov scaling. Near the hub, we observe secondary vortices. Despite the positive radial ejections in that regions, these secondary vortices drift towards the hub, they dissipate energy and circulation and their core grows in size. © 2024 The Authors Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2025 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0997754624000165?dgcid=rss_sd_all
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