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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 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Wakes and secondary structures past stator wheel in test turbine VT-400 observed by PIV Author(s) Duda, D. (CZ)
Klimko, M. (CZ)
Milčák, P. (CZ)
Jeřábek, M. (CZ)
Uruba, Václav (UT-L) RID, ORCID
Yanovych, V. (CZ)
Žitek, P. (CZ)Source Title European Journal of Mechanics B-Fluids. - : Elsevier - ISSN 0997-7546
Roč. 105, May-June (2024), s. 151-163Number of pages 13 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords Particle image velocimetry ; Turbine ; Secondary vortices ; Stator wake ; Vortex identification algorithm Subject RIV BK - Fluid Dynamics OECD category Applied mechanics Method of publishing Open access Institutional support UT-L - RVO:61388998 UT WOS 001172246600001 EID SCOPUS 85183457748 DOI 10.1016/j.euromechflu.2024.01.008 Annotation 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 Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2025 Electronic address https://www.sciencedirect.com/science/article/pii/S0997754624000165?dgcid=rss_sd_all
Number of the records: 1