Prediction of Turbomachinery Aeroelastic Behavior From a Set of Representative Modes
2013 (English)In: Journal of turbomachinery, ISSN 0889-504X, Vol. 135, no 1, 011032- p.Article in journal (Refereed) Published
A method is proposed for the determination of the aeroelastic behavior of a system responding to mode-shapes which are different from the tuned in vacuo ones, due to mistuning, mode family interaction, or any other source of mode-shape perturbation. The method is based on the generation of a data base of unsteady aerodynamic forces arising from the motion of arbitrary modes and uses least square approximations for the prediction of any responding mode. The use of a reduced order technique allows for mistuning analyses and is also applied for the selection of a limited number of arbitrary modes. The application of this method on a transonic compressor blade shows that the method captures the aeroelastic properties well in a wide frequency range. A discussion of the influence of the mode-shapes and frequency on the final stability response is also provided.
Place, publisher, year, edition, pages
2013. Vol. 135, no 1, 011032- p.
Aeroelastic behavior, Aeroelastic properties, Least square approximations, Mistuning, Mistuning analysis, Mode shapes, Reduced order, Transonic compressor blades, Unsteady aerodynamic force, Wide frequency range, Aeroelasticity, Perturbation techniques
IdentifiersURN: urn:nbn:se:kth:diva-107264DOI: 10.1115/1.4006536ISI: 000312989900032ScopusID: 2-s2.0-84868118464OAI: oai:DiVA.org:kth-107264DiVA: diva2:575408
QC 201212102012-12-102012-12-102013-04-16Bibliographically approved