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Schuff, Matthias and Chenaux, Virginie (2021) Coupled Mode Flutter Analysis of Turbomachinery Blades Using an Adaptation of the p-k Method. Journal of Engineering for Gas Turbines and Power, 143 (2), 021017. American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4048986. ISSN 0742-4795.
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Abstract
Current trends in turbomachinery design significantly reduce the mass ratio of structure to air, making them prone to flutter by aerodynamic coupling between mode shapes, also called coupled-mode flutter. The p-k method, which solves an aeroelastic eigenvalue problem for frequency and damping, respectively, excitation of the aerodynamically coupled system, was adapted for turbomachinery application using aerodynamic responses computed in the frequency domain (FD). A two-dimensional (2D) test case is validated against time-marching fluid-structure coupled simulations for subsonic and transonic conditions. A span of mass ratios is investigated showing that the adapted p-k method is able to predict the transition between aeroelastically stable and unstable cascades depending on the mass ratio. Finally, the p-k method is applied to a low mass ratio fan showing that the flutter-free operating range is significantly reduced when aerodynamic coupling effects are taken into account.
| Item URL in elib: | https://elib.dlr.de/140714/ | |||||||||
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| Document Type: | Article | |||||||||
| Title: | Coupled Mode Flutter Analysis of Turbomachinery Blades Using an Adaptation of the p-k Method | |||||||||
| Authors: |
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| Date: | February 2021 | |||||||||
| Journal or Publication Title: | Journal of Engineering for Gas Turbines and Power | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | No | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | Yes | |||||||||
| In ISI Web of Science: | Yes | |||||||||
| Volume: | 143 | |||||||||
| DOI : | 10.1115/1.4048986 | |||||||||
| Page Range: | 021017 | |||||||||
| Publisher: | American Society of Mechanical Engineers (ASME) | |||||||||
| ISSN: | 0742-4795 | |||||||||
| Status: | Published | |||||||||
| Keywords: | turbomachinery, flutter, coupled mode, aerodynamic coupling, mass ratio, lightweight, fan | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||
| HGF - Program: | Aeronautics | |||||||||
| HGF - Program Themes: | propulsion systems | |||||||||
| DLR - Research area: | Aeronautics | |||||||||
| DLR - Program: | L ER - Engine Research | |||||||||
| DLR - Research theme (Project): | L - Fan and Compressor Technologies (old), L - Flight Physics (old), L - Virtual Engine and Validation methods (old) | |||||||||
| Location: | Göttingen | |||||||||
| Institutes and Institutions: | Institute of Aeroelasticity Institute of Aeroelasticity > Aeroelastic Experiments | |||||||||
| Deposited By: | Schuff, Matthias | |||||||||
| Deposited On: | 01 Feb 2021 11:31 | |||||||||
| Last Modified: | 01 Feb 2021 11:31 |
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