Classical flutter analysis of low pressure steam turbine blade cascade using 3D boundary element method

0508616 - ÚT 2020 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Prasad, Chandra Shekhar - Pešek, Luděk
Classical flutter analysis of low pressure steam turbine blade cascade using 3D boundary element method.
The International Colloquium Dynamics of Machines and Mechanical Systems with Interactions : DYMAMESI 2019. Prague: Institute of Thermomechanics CAS, 2019 - (Kozieň, M.; Zolotarev, I.; Pešek, L.), s. 51-56. ISBN 978-80-87012-70-3.
[DYMAMESI 2019. Cracow (PL), 05.03.2019-06.03.2019]
Grant CEP: GA ČR(CZ) GC19-02288J
Grant ostatní: AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institucionální podpora: RVO:61388998
Klíčová slova: steam turbine * aeroelasticity * classical flutter * traveling wave mode * panel method * aerodynamic damping
Obor OECD: Applied mechanics

In this paper study of aeroelastic stability in steam turbine rotor is carried out using boundary element method. A mesh free fluid
solver is developed for fast estimation of unsteady aerodynamic loading and to estimate the aerodynamic damping in 3D blade cascade. The aerodynamic damping is estimated in traveling wave mode. The unsteady incompressible flow field is modeled using 3D surface Panel method. The proposed methodology successfully estimates aerodynamic damping with acceptable accuracy the for the aeroelastic (classical
flutter) analysis of 3D blade cascade. The simulated results are compared with experimental data. The simulated aerodynamic damping shows good agreement with
experimental results. The present methodology shows significant reduction in computational time over computational fluid dynamic solvers.
Trvalý link: http://hdl.handle.net/11104/0302320