Efficient prediction of classical flutter stability of turbomachinery blade using the boundary element type numerical method

0524925 - ÚT 2021 RIV US eng J - Journal Article
Prasad, Chandra Shekhar - Pešek, Luděk
Efficient prediction of classical flutter stability of turbomachinery blade using the boundary element type numerical method.
Engineering Analysis With Boundary Elements. Roč. 113, April (2020), s. 328-345. ISSN 0955-7997. E-ISSN 1873-197X
R&D Projects: GA ČR GA16-04546S
Institutional support: RVO:61388998
Keywords : turbomachinery * aeroelasticity * panel method * aerodynamic damping * traveling wave mode * classical flutter * boundary element method
OECD category: Applied mechanics
Impact factor: 2.964, year: 2020
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0955799720300199?via%3Dihub

In this paper classical flutter phenomena in power turbine rotor is studied. A medium fidelity 2D flow solver based on boundary element method is developed for this purpose. The classical flutter parameters in turbomachinery cascades such as aerodynamic damping at different inter-blade phase angleare estimated using flutter stability analysis flow solver. The flow solver isdeveloped using 2D unsteady potential ow based panel method. The unsteadyaerodynamic loading on the vibrating cascade is estimated using a traveling-wave mode oscillation. The simulated aerodynamic damping and pressure coeficient using boundary element method are compared against both experimental data and the computational uid dynamics model's resultsat difeerent ow conditions. The boundary element based method results demonstrate good agreement with experimental data. The boundaryelement based flow solver shows significant reduction in computational time compared to computational fluid dynamics model.
Permanent Link: http://hdl.handle.net/11104/0310312