Particle Image Velocimetry Measurement Inside Axial Air Test Turbine – Effect of Window

0542739 - ÚT 2022 RIV US eng C - Conference Paper (international conference)
Duda, D. - Jelínek, T. - Němec, M. - Uruba, Václav - Yanovych, V. - Žitek, P.
Particle Image Velocimetry Measurement Inside Axial Air Test Turbine – Effect of Window.
19th Conference on Power System Engineering. Melville: American Institute of Physics Inc., 2021 - (Richter, L.; Vasickova, E.; Vasickova, M.; Volf, M.), č. článku 030005. 2323. ISBN 978-0-7354-4067-8. ISSN 0094-243X. E-ISSN 1551-7616.
[Conference on Power System Engineering /19./. Plzeň (CZ), 08.09.2020-10.09.2020]
R&D Projects: GA TA ČR(CZ) TH02020057; GA TA ČR(CZ) TN01000007
Institutional support: RVO:61388998
Keywords : turbine * PIV * turbulence
OECD category: Applied mechanics
https://aip.scitation.org/doi/epdf/10.1063/5.0041492

The air flow inside single-stage test turbine is studied experimentally by Particle Image Velocimetry (PIV). Here we report the measurements results at axial-tangential plane just behind the rotor wheel at middle blade radius. We studied one nominal state and two off-design states. We discuss the applicability of resolution of our PIV system to this flow – we can distinguish the largest vortical structures in the shear layers between blade wake and jet, but the bottom part of the cascade is invisible for us at this moment. Spatial distributions of statistical moments of vorticity show a non-classical behavior at the cross-points of stator and rotor jets. We use our previously published algorithm for calculating spatial energy spectrum and display the turbulent kinetic energy colored by different length-scales of the fluctuations.
Permanent Link: http://hdl.handle.net/11104/0320723