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Observation of Flow Structure Past a Full-stage Axial Air Turbine at The Nominal and Off-design States
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SYSNO ASEP 0542734 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Observation of Flow Structure Past a Full-stage Axial Air Turbine at The Nominal and Off-design States Author(s) Duda, D. (CZ)
Jelínek, T. (CZ)
Němec, M. (CZ)
Uruba, Václav (UT-L) RID, ORCID
Yanovych, V. (CZ)
Žitek, P. (CZ)Article number 030004 Source Title 19th Conference on Power System Engineering, AIP Conference Proceedings. - Melville : American Institute of Physics Inc., 2021 / Richter L. ; Vasickova E. ; Vasickova M. ; Volf M. - ISSN 0094-243X - ISBN 978-0-7354-4067-8 Number of pages 7 s. Publication form Online - E Action Conference on Power System Engineering /19./ Event date 08.09.2020 - 10.09.2020 VEvent location Plzeň Country CZ - Czech Republic Event type WRD Language eng - English Country US - United States Keywords turbine ; PIV ; turbulence Subject RIV BK - Fluid Dynamics OECD category Applied mechanics R&D Projects TH02020057 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) TN01000007 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support UT-L - RVO:61388998 UT WOS 000668075000013 EID SCOPUS 85102726142 DOI 10.1063/5.0041491 Annotation 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. 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://aip.scitation.org/doi/epdf/10.1063/5.0041491
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