Prediction of Turbomachinery Aeroelastic Behavior from a Set of Representative Modes
2012 (English)In: Proceedings of the ASME Turbo Expo 2011, Vol 6, Parts And B / [ed] Presented by ASME International Gas Turbine Institute, Vancouver, Canada: American Society of Mechanical Engineers , 2012, 1449-1461 p.Conference paper (Refereed)
A method is proposed for the determination of the aeroelastic behavior of a system responding to mode-shapes different to 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 on a transonic compressor blade shows that the method captures well the aeroelastic properties 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
Vancouver, Canada: American Society of Mechanical Engineers , 2012. 1449-1461 p.
aeromechanics, aeroelasticity, stability, flutter, turbomachinery, methods
Research subject SRA - Energy; Järnvägsgruppen - Ljud och vibrationer
IdentifiersURN: urn:nbn:se:kth:diva-48896DOI: 10.1115/GT2011-46690ISI: 000321160200141ScopusID: 2-s2.0-84865519323ISBN: 978-0-7918-5466-2OAI: oai:DiVA.org:kth-48896DiVA: diva2:458826
ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, GT2011; Vancouver, BC, Canada, 6 June-10 June, 2011
QC 201111252011-11-242011-11-242014-10-03Bibliographically approved