1-20 of 141
Eigenvalues
Close
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Insight Into the Rotor Dynamics Consortium’s History, Vision, and Ongoing Technical Projects

Don Powell, Hemant Patel
Proc. ASME. GT2024, Volume 10B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V10BT26A022, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-129422
https://doi.org/10.1115/GT2024-129422
View Paper titled, Insight Into the Rotor Dynamics Consortium’s History, Vision, and Ongoing Technical Projects
Open the PDF for Insight Into the Rotor Dynamics Consortium’s History, Vision, and Ongoing Technical Projects in another window
Topics: Rotordynamics, Rotors, Engines, Damping, Jet engines, Simulation, Aircraft, Aircraft engines, Computer software, Design
Proceedings Papers

Damping Phenomena in Rotating Machines: A Focus on Rotor Damping With Synchronous and Asynchronous Excitation

Francesco D’Alessandro, Florian Garnier, Damien Guivarch, Amit Zutshi, Weize Kang, Manoj Kunnil, Payyoor Narayanan, Mark Robinson, J. S. Kumar, Jianming Cao, Ted Rose
Proc. ASME. GT2024, Volume 10B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V10BT26A010, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-125865
https://doi.org/10.1115/GT2024-125865
View Paper titled, Damping Phenomena in Rotating Machines: A Focus on Rotor Damping With Synchronous and Asynchronous Excitation
Open the PDF for Damping Phenomena in Rotating Machines: A Focus on Rotor Damping With Synchronous and Asynchronous Excitation in another window
Topics: Damping, Excitation, Machinery, Rotors, Aircraft engines, Computer software, Rotation, Vibration, Whirls, Aerospace industry
Proceedings Papers

A Study on Average Eigenvalue Sensitivity for the Improvement of Rotordynamic Stability of Integrally Geared Centrifugal Compressors

Zhusan Luo, Carl L. Schwarz
Proc. ASME. GT2024, Volume 10B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V10BT26A017, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128308
https://doi.org/10.1115/GT2024-128308
View Paper titled, A Study on Average Eigenvalue Sensitivity for the Improvement of Rotordynamic Stability of Integrally Geared Centrifugal Compressors
Open the PDF for A Study on Average Eigenvalue Sensitivity for the Improvement of Rotordynamic Stability of Integrally Geared Centrifugal Compressors in another window
Topics: Compressors, Eigenvalues, Stability
Proceedings Papers

Stability of a Lateral Contact Between a Rotor and Stator When Rubbing

Jason Wilkes
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT26A019, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103969
https://doi.org/10.1115/GT2023-103969
View Paper titled, Stability of a Lateral Contact Between a Rotor and Stator When Rubbing
Open the PDF for Stability of a Lateral Contact Between a Rotor and Stator When Rubbing in another window
Topics: Rotors, Stability, Stators, Eigenvalues, Bearings, Compressors, Damping, Friction, Machinery, Stiffness
Proceedings Papers

The Nonlinear Thermoacoustic Eigenvalue Problem and Its Rational Approximations: Assessment of Solution Strategies

Moritz Merk, Philip E. Buschmann, Jonas P. Moeck, Wolfgang Polifke
Proc. ASME. GT2022, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A011, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-79653
https://doi.org/10.1115/GT2022-79653
View Paper titled, The Nonlinear Thermoacoustic Eigenvalue Problem and Its Rational Approximations: Assessment of Solution Strategies
Open the PDF for The Nonlinear Thermoacoustic Eigenvalue Problem and Its Rational Approximations: Assessment of Solution Strategies in another window
Topics: Approximation, Eigenvalues, Combustion chambers, Flames, Thermoacoustics
Proceedings Papers

Interplay of Clusters of Acoustic and Intrinsic Thermoacoustic Modes in Can-Annular Combustors

Guillaume J. J. Fournier, Felicitas Schaefer, Matthias Haeringer, Camilo F. Silva, Wolfgang Polifke
Proc. ASME. GT2022, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A026, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80785
https://doi.org/10.1115/GT2022-80785
View Paper titled, Interplay of Clusters of Acoustic and Intrinsic Thermoacoustic Modes in Can-Annular Combustors
Open the PDF for Interplay of Clusters of Acoustic and Intrinsic Thermoacoustic Modes in Can-Annular Combustors in another window
Topics: Acoustics, Combustion chambers, Cavities, Dimensionless numbers, Eigenvalues, Flames, Flow (Dynamics), Gas turbines, Network models, Switches
Proceedings Papers

Mistuning Effects on Aero-Elastic Stability of Civil Transonic Fan Blades

Bo Lian, Xiaocheng Zhu, Zhaohui Du
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
https://doi.org/10.1115/GT2022-80613
View Paper titled, Mistuning Effects on Aero-Elastic Stability of Civil Transonic Fan Blades
Open the PDF for Mistuning Effects on Aero-Elastic Stability of Civil Transonic Fan Blades in another window
Topics: Blades, Damping, Eigenvalues, Flutter (Aerodynamics), Stability, Design, Commercial air transport, Engineering simulation, Engines, Errors
Proceedings Papers

Mixed Whirl Modes in Numerical Rotordynamics Analysis

Konrad Juethner, Ted Rose, J. S. Kumar, Jianming Cao, Gregory M. Savela, Chris J. Zuck, Parag H. Mathuria
Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT26A004, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-79755
https://doi.org/10.1115/GT2022-79755
View Paper titled, Mixed Whirl Modes in Numerical Rotordynamics Analysis
Open the PDF for Mixed Whirl Modes in Numerical Rotordynamics Analysis in another window
Topics: Rotordynamics, Whirls, Rotors, Design, Eigenvalues, Stability, Algorithms, Economics , Fatigue, Finite element analysis
Proceedings Papers

Gradient Enhanced Kriging Using Modal Sensitivity Approximations in a Reduced Basis Space for As-Manufactured Airfoil Analysis

Jeffrey M. Brown, Emily B. Carper, Alex A. Kaszynski, Daniel L. Gillaugh, Joseph A. Beck
Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT27A034, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83402
https://doi.org/10.1115/GT2022-83402
View Paper titled, Gradient Enhanced Kriging Using Modal Sensitivity Approximations in a Reduced Basis Space for As-Manufactured Airfoil Analysis
Open the PDF for Gradient Enhanced Kriging Using Modal Sensitivity Approximations in a Reduced Basis Space for As-Manufactured Airfoil Analysis in another window
Topics: Airfoils, Approximation, Mode shapes, Displacement, Eigenvalues, Degrees of freedom, Geometry
Proceedings Papers

Estimation of Dynamical Thermoacoustic Modes Using an Output Only Observer Kalman Filter-Based Identification (O 3 KID) Algorithm

Nikhil Balasubramanian, Driek Rouwenhorst, Jakob Hermann
Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T05A001, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80650
https://doi.org/10.1115/GT2022-80650
View Paper titled, Estimation of Dynamical Thermoacoustic Modes Using an Output Only Observer Kalman Filter-Based Identification (O 3 KID) Algorithm
Open the PDF for Estimation of Dynamical Thermoacoustic Modes Using an Output Only Observer Kalman Filter-Based Identification (O 3 KID) Algorithm in another window
Topics: Algorithms, Filters, Modeling, Dynamics (Mechanics), Noise (Sound), Combustion, Kalman filters, Combustion chambers, Damping, Gas turbines
Proceedings Papers

Investigation on Strain and Stress Principal Axes in Unsteady DNS Turbine Data

D. Lengani, D. Simoni, L. De Vincentiis, K. Ðurović, J. Pralits, D. S. Henningson, A. Hanifi
Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT37A031, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83197
https://doi.org/10.1115/GT2022-83197
View Paper titled, Investigation on Strain and Stress Principal Axes in Unsteady DNS Turbine Data
Open the PDF for Investigation on Strain and Stress Principal Axes in Unsteady DNS Turbine Data in another window
Topics: Stress, Turbines, Turbulence, Tensors, Eigenvalues, Blades, Boundary layers, Reynolds stress, Suction, Cascades (Fluid dynamics)
Proceedings Papers

A Non-Compact Effective Impedance Model for Can-to-Can Acoustic Communication: Analysis and Optimization of Damping Mechanisms

Jakob G. R. von Saldern, Alessandro Orchini, Jonas P. Moeck
Proc. ASME. GT2021, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A051, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59321
https://doi.org/10.1115/GT2021-59321
View Paper titled, A Non-Compact Effective Impedance Model for Can-to-Can Acoustic Communication: Analysis and Optimization of Damping Mechanisms
Open the PDF for A Non-Compact Effective Impedance Model for Can-to-Can Acoustic Communication: Analysis and Optimization of Damping Mechanisms in another window
Topics: Acoustics, Damping, Optimization, Combustion chambers, Flow (Dynamics), Porosity, Density, Eigenvalues, Fluctuations (Physics), Modeling
Proceedings Papers

Numerical Methods for Calculating Component Modes for Geometric Mistuning Reduced-Order Models

Joseph A. Beck, Jeffrey M. Brown, Alex A. Kaszynski, Daniel L. Gillaugh
Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT29A016, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59126
https://doi.org/10.1115/GT2021-59126
View Paper titled, Numerical Methods for Calculating Component Modes for Geometric Mistuning Reduced-Order Models
Open the PDF for Numerical Methods for Calculating Component Modes for Geometric Mistuning Reduced-Order Models in another window
Topics: Eigenvalues, Errors, Finite element model, Geometry, Numerical analysis, Optical scanners, Parallel processing, Rotors, Stiffness, Storage
Proceedings Papers

The Impact of Exceptional Points on the Reliability of Thermoacoustic Stability Analysis

Felicitas Schäfer, Shuai Guo, Wolfgang Polifke
Proc. ASME. GT2020, Volume 4B: Combustion, Fuels, and Emissions, V04BT04A014, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15496
https://doi.org/10.1115/GT2020-15496
View Paper titled, The Impact of Exceptional Points on the Reliability of Thermoacoustic Stability Analysis
Open the PDF for The Impact of Exceptional Points on the Reliability of Thermoacoustic Stability Analysis in another window
Topics: Reliability, Stability, Eigenvalues, Flames, Algorithms, Computation, Dynamics (Mechanics), Eigenfunctions, Modeling, Numerical stability
Proceedings Papers

Analysis of Autoignition Chemistry in Aeroderivative Premixers at Engine Conditions

Sandeep Jella, Gilles Bourque, Pierre Gauthier, Philippe Versailles, Jeffrey Bergthorson, Ji-Woong Park, Tianfeng Lu, Snehashish Panigrahy, Henry Curran
Proc. ASME. GT2020, Volume 4B: Combustion, Fuels, and Emissions, V04BT04A023, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15697
https://doi.org/10.1115/GT2020-15697
View Paper titled, Analysis of Autoignition Chemistry in Aeroderivative Premixers at Engine Conditions
Open the PDF for Analysis of Autoignition Chemistry in Aeroderivative Premixers at Engine Conditions in another window
Topics: Chemistry, Engines, Explosives, Flames, Fuels, Risk, Ethers (Class of compounds), Ignition delay, Methane, Chemical kinetics
Proceedings Papers

Experimental Investigation on the Loss Production Mechanisms in Transitional Boundary Layers

M. Dellacasagrande, D. Lengani, D. Simoni, M. Ubaldi, P. Zunino
Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A019, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15148
https://doi.org/10.1115/GT2020-15148
View Paper titled, Experimental Investigation on the Loss Production Mechanisms in Transitional Boundary Layers
Open the PDF for Experimental Investigation on the Loss Production Mechanisms in Transitional Boundary Layers in another window
Topics: Boundary layers, Flow (Dynamics), Eigenvalues, Turbulence, Pressure gradient, Shear (Mechanics), Stress tensors, Bubbles, Displacement, Energy dissipation
Proceedings Papers

Low Rank Education of Cascade Loss Sensitivity to Unsteady Parameters by Proper Orthogonal Decomposition

D. Lengani, D. Simoni, V. Yepmo, M. Ubaldi, P. Zunino, F. Bertini
Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A021, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15156
https://doi.org/10.1115/GT2020-15156
View Paper titled, Low Rank Education of Cascade Loss Sensitivity to Unsteady Parameters by Proper Orthogonal Decomposition
Open the PDF for Low Rank Education of Cascade Loss Sensitivity to Unsteady Parameters by Proper Orthogonal Decomposition in another window
Topics: Cascades (Fluid dynamics), Education, Principal component analysis, Eigenvalues, Flow (Dynamics), Chords (Trusses), Pressure, Approximation, Blades, Design
Proceedings Papers

Dynamic Mode Decomposition Analysis of Separated Boundary Layers Under Variable Reynolds Number and Free-Stream Turbulence

M. Dellacasagrande, J. Verdoya, D. Barsi, D. Lengani, D. Simoni
Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A038, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-16322
https://doi.org/10.1115/GT2020-16322
View Paper titled, Dynamic Mode Decomposition Analysis of Separated Boundary Layers Under Variable Reynolds Number and Free-Stream Turbulence
Open the PDF for Dynamic Mode Decomposition Analysis of Separated Boundary Layers Under Variable Reynolds Number and Free-Stream Turbulence in another window
Topics: Boundary layers, Reynolds number, Turbulence, Wavelength, Fluctuations (Physics), Shear (Mechanics), Vortices, Accounting, Control systems, Density
Proceedings Papers

Energetically Consistent Computation of Combustor Stability With a Model Consisting of a Helmholtz-FEM-Domain and a Low-Order Network

Gerrit Heilmann, Christoph Hirsch, Thomas Sattelmayer
Proc. ASME. GT2020, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A032, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14610
https://doi.org/10.1115/GT2020-14610
View Paper titled, Energetically Consistent Computation of Combustor Stability With a Model Consisting of a Helmholtz-FEM-Domain and a Low-Order Network
Open the PDF for Energetically Consistent Computation of Combustor Stability With a Model Consisting of a Helmholtz-FEM-Domain and a Low-Order Network in another window
Topics: Combustion chambers, Computation, Finite element methods, Finite element model, Stability, Acoustics, Damping, Eigenvalues, Flow (Dynamics), Boundary-value problems
Proceedings Papers

Adjoint-Based Calculation of Parametric Thermoacoustic Maps of an Industrial Combustion Chamber

Camilo F. Silva, Laura Prieto, Maximiliano Ancharek, Pablo Marigliani, Georg A. Mensah
Proc. ASME. GT2020, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A038, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14699
https://doi.org/10.1115/GT2020-14699
View Paper titled, Adjoint-Based Calculation of Parametric Thermoacoustic Maps of an Industrial Combustion Chamber
Open the PDF for Adjoint-Based Calculation of Parametric Thermoacoustic Maps of an Industrial Combustion Chamber in another window
Topics: Combustion chambers, Eigenvalues, Flames, Delays, Energy generation, Perturbation theory, Polynomials, Resolution (Optics), Stability, Turbines