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Experimental Investigation of the Unsteady Stator/Rotor Wake Characteristics Downstream of an Axial Air Turbine
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SYSNO ASEP 0545831 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Experimental Investigation of the Unsteady Stator/Rotor Wake Characteristics Downstream of an Axial Air Turbine Author(s) Duda, D. (CZ)
Jelínek, T. (CZ)
Milčák, P. (CZ)
Němec, M. (CZ)
Uruba, Václav (UT-L) RID, ORCID
Yanovych, Vitalii (UT-L)
Žitek, P. (CZ)Article number 22 Source Title International Journal of Turbomachinery, Propulsion and Power. - : MDPI
Roč. 6, č. 3 (2021)Number of pages 23 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords Particle Image Velocimetry ; turbine ; turbine test facility ; length-scale ; turbomachinery ; wake OECD category Applied mechanics R&D Projects TN01000007 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Open access Institutional support UT-L - RVO:61388998 UT WOS 000700698300001 EID SCOPUS 85110477662 DOI 10.3390/ijtpp6030022 Annotation A feasibility study of velocity field measurements using the Particle Image Velocimetry (PIV) method in an axial air turbine model is presented. The wakes past the blades of the rotor wheel were observed using the PIV technique. Data acquisition was synchronized with the shaft rotation, thus, the wakes were phase averaged for statistical analysis. The interaction of the rotor blade wakes with the stator ones was investigated by changing the stator wheel’s angle. The measurement planes were located just behind the rotor blades, covering approximately 3 cm x 3 cm in axial x tangential directions. The spatial correlation function suggests that the resolution used is sufficient for the large-scale flow-patterns only, but not for the small ones. The scales of fluctuations correspond to the shear layer thickness at the mid-span plane but, close to the end-wall, they contain larger structures caused by the secondary flows. The length-scales of the fluctuations under off-design conditions display a dependence on the area of the stator and rotor wakes cross-sections, which, in turn, depend on their angle. The obtained experimental data are to be used for the validation of mathematical simulation results in the future. 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 2022 Electronic address https://www.mdpi.com/2504-186X/6/3/22/htm
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