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Keywords: flutter
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Proceedings Papers

Proc. ASME. GT2023, Volume 13D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V13DT35A008, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102051
.... aeroelasticity turbocharger flutter vibration ROM CFD interpolation kriging toolbox confidence levels Proceedings of ASME Turbo Expo 2023 Turbomachinery Technical Conference and Exposition GT2023 June 26-30, 2023, Boston, Massachusetts, USA GT2023-102051 A PISTON THEORY-BASED AEROELASTIC STABILITY...
Proceedings Papers

Proc. ASME. GT2023, Volume 10: Steam Turbine, V010T20A018, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103510
..., uncoupled time domain flutter simulations were also performed to test the capability of the mesh deformation strategy to deal with snubber elements ensuring a smooth grid deformation without any cell interlacing. The simplified body forces model showed a good balance between results accuracy...
Proceedings Papers

Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT21A005, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101894
... are then compared to the coupled full order model (FOM) of reference: consistent predictions for the damping ratio are achieved, with a substantial reduction of the computational cost with respect to full order models of reference. reduced order model compressor aeroelasticity flutter system...
Proceedings Papers

Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT21A004, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101677
... improvement to the flutter stability of the interlocked rotor rows; some well-known approaches, such as the Panovsky-Kielb stability maps, suggest that flutter should be very unlikely for interlock configurations. Nevertheless, both the experience and detailed simulations indicate that it is possible to find...
Proceedings Papers

Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT21A002, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101059
... Abstract Non-synchronous vibration (NSV) in axial compressors can be caused either by 1) unsteady aerodynamic forces that are not related to motion of the blades or 2) motion-dependent aerodynamic forcing (e.g., flutter). Aerodynamic forcing mechanisms can be challenging to identify...
Proceedings Papers

Proc. ASME. GT2023, Volume 11A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics, V11AT21A017, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103881
... at studying the aeromechanical behaviour of a modern compressor, highlighting that the amplitude of the blade vibration does not increase linearly with the distortion amplitude. compressor distortion NLH flutter forced-response Proceedings of ASME Turbo Expo 2023 Turbomachinery Technical...
Proceedings Papers

Proc. ASME. GT2023, Volume 13C: Turbomachinery — Deposition, Erosion, Fouling, and Icing; Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V13CT32A016, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101907
...Proceedings of ASME Turbo Expo 2023 Turbomachinery Technical Conference and Exposition GT2023 June 26-30, 2023, Boston, Massachusetts, USA GT2023-101907 ANALYTICAL, NUMERICAL AND EXPERIMENTAL STUDY OF FLUTTER IN A REALISTIC LABYRINTH SEAL Oscar Bermejo1 Juan Manuel Gallardo2, Adrian Sotillo1, Arnau...
Proceedings Papers

Proc. ASME. GT2023, Volume 13D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V13DT36A012, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102237
.... It is shown that flutter can be predicted over the investigated speed range using a reduced computational domain. The benefit in computational speed justifies simplifications made and allows a more detailed unsteady analysis. During the unsteady analysis, it is shown that the transition from stable...
Proceedings Papers

Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT34A007, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80876
... to determine the presence or absence of fluid-induced vibration and flutter. As a result of machine learning-based optimization, the optimized blade shape has a lower risk of blade resonance. Also, the aerodynamic performance of the axial compressor has been improved compared to the reference model...
Proceedings Papers

Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T20A013, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82405
.... In this part 1 paper, the last rotor of a low-pressure steam turbine module installed in concentrated solar plants has been numerically evaluated to assess the flutter stability at different low load conditions, while the companion part 2 deals with the investigation of unsteady aerodynamic instabilities which...
Proceedings Papers

Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT27A016, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82208
... Abstract Intentional mistuning is employed for a last stage turbine wheel featuring 51 blades to alleviate both the flutter susceptibility and maximum forced response. Primarily, operations at nominal speed under part-load conditions may cause unfavorable flow conditions facilitating flow...
Proceedings Papers

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT21A005, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80613
... Abstract Flutter seriously affects the safety and reliability of aeroengine. The blade mistuning is inevitable due to machining error and service wear, which has a significant influence on flutter stability. In this paper, the eigenvalue method is used to calculate the aerodynamic damping...
Proceedings Papers

Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT27A011, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81753
... Abstract Blade Tip Timing (BTT) is a simple, robust and non-intrusive method for measuring the rotor blade vibrations in turbomachinery. The analysis of vibrations characterized by multiple spectral components typical for example of flutter is challenging. This paper proposes a probabilistic...
Proceedings Papers

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT23A005, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58818
... Abstract Flutter seriously affects the safety and reliability of aeroengine. In this paper, influence coefficient method (ICM) and traveling wave method (TWM) are used to calculate the aerodynamic damping of transonic fan blades of civil aviation engine at different nodal diameters (NDs...
Proceedings Papers

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT23A001, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58766
... Abstract The accurate predication of aerodynamic flutter margin continues to be an area of growing importance in the design of rotating turbomachinery, especially when considering the ongoing industry objectives for increased operating efficiency, higher power output, and reduced fuel...
Proceedings Papers

Proc. ASME. GT2021, Volume 6: Ceramics and Ceramic Composites; Coal, Biomass, Hydrogen, and Alternative Fuels; Microturbines, Turbochargers, and Small Turbomachines, V006T19A002, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58759
... to experience high-cycle fatigue brought on by aerodynamically-induced blade resonances. The onset of fluid-structural interactions, such as flutter and forced response, in turbochargers at these conditions has not been extensively studied. A reduced-order model of the aeroelastic response of the turbine...
Proceedings Papers

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT24A008, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14758
... Abstract Flutter is one of the important issues in turbomachinery analysis. There are four common types of flutter, including sub/transonic stall flutter, choke flutter, supersonic stall flutter, and supersonic non-stall flutter. Flutter may occur under many different operating conditions...
Proceedings Papers

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT24A012, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15083
... aerodynamic forces, such as turbomachinery, and aircraft. The structure of those machines is subject to aeromechanical dynamics, including forced response and flutter. The strength of aeromechanical interaction depends on the level of coupling between flow and structure. One effect that can lead to strong...
Proceedings Papers

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT24A020, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15563
... conditions. The energetic method which is usually applied to blade flutter problems was used for aeroelastic stability analysis. Radial surface displacements were set according to the harmonic oscillation function that corresponds to the oil collector s first bending eigenmode with two nodal diameters. 3D...
Proceedings Papers

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT24A021, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15723
... with rigid body blade motion have significantly improved understanding of turbine flutter mechanisms and design parameters. However rigid body motion cannot accurately match the complex mode shapes of modern turbine blade, so there are limitations of accuracy on experimental evaluation of flutter stability...