Simple model for investigation of aerodynamic coupling in linear blade cascades

0536370 - ÚT 2021 RIV CZ eng C - Conference Paper (international conference)
Chládek, Štěpán - Pešek, Luděk - Procházka, Pavel P.
Simple model for investigation of aerodynamic coupling in linear blade cascades.
Dymamesi 2020. Praha: Institute of Thermomechanics Academy of Sciences of the Czech Republic, v. v. i., 2020 - (Zolotarev, I.; Pešek, L.; Kozieň, M.), s. 9-12. First edition. ISBN 978-80-87012-73-4.
[International colloquium DYMAMESI 2020. Praha (CZ), 03.03.2020-04.03.2020]
R&D Projects: GA ČR(CZ) GA20-26779S
Grant - others:AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institutional support: RVO:61388998
Keywords : linear cascade stability * aerodynamic damping * PIV
OECD category: Applied mechanics

Simple viscous-elastic model has been proposed for investigation of aerodynamic coupling in linear blade cascades. One blade is connected with both adjacent blades using idealized springs and dampers which represent viscous fluid. All blades may oscillate with one degree of freedom represented by vertical translation. Energy method using travelling waves model was utilized for aerodynamic damping coefficient derivation. The proposed model does not compute the damping values quantitatively, nevertheless it provides the damping shape analysis. Interesting results are presented within zero and low subsonic flow velocities, where the experiment included velocity flow field measurement.
Permanent Link: http://hdl.handle.net/11104/0314730