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Journal Articles

A New Harmonic Balance Approach Using Multidimensional Time

Laura Junge, Christian Frey, Graham Ashcroft, Edmund Kügeler

J. Eng. Gas Turbines Power. August 2021, 143(8): 081007.

Paper No: GTP-20-1505

DOI: https://doi.org/10.1115/1.4049698

Published Online: March 31, 2021

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Topics: Blades, Flow (Dynamics), Fourier transforms, Pressure, Simulation, Wakes, Unsteady flow, Flutter (Aerodynamics), Inflow

Proceedings Papers

On the Formulation of Nonreflecting Boundary Conditions for Turbomachinery Configurations: Part I — Theory and Implementation

Christian Frey, Daniel Schlüß, Nina Wolfrum, Patrick Bechlars, Maximilian Beck

Proc. ASME. GT2020, Volume 2C: Turbomachinery, V02CT35A019, September 21–25, 2020

Paper No: GT2020-14684

DOI: https://doi.org/10.1115/GT2020-14684

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Topics: Boundary-value problems, Simulation, Turbomachinery, Unsteady flow

Proceedings Papers

On the Formulation of Nonreflecting Boundary Conditions for Turbomachinery Configurations: Part II — Application and Analysis

Nina Wolfrum, Patrick Bechlars, Maximilian Beck, Christian Frey, Daniel Schlüß

Proc. ASME. GT2020, Volume 2C: Turbomachinery, V02CT35A037, September 21–25, 2020

Paper No: GT2020-15358

DOI: https://doi.org/10.1115/GT2020-15358

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Topics: Boundary-value problems, Turbomachinery, Flow (Dynamics), Waves, Algorithms, Computational fluid dynamics, Acoustics, Blades, Computation, Design

Proceedings Papers

A New Harmonic Balance Approach Using Multidimensional Time

Laura Junge, Christian Frey, Graham Ashcroft, Edmund Kügeler

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT24A031, September 21–25, 2020

Paper No: GT2020-16224

DOI: https://doi.org/10.1115/GT2020-16224

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Topics: Aeroelasticity, Blades, Computer simulation, Engineering simulation, Errors, Excitation, Flow (Dynamics), Flutter (Aerodynamics), Fourier transforms, Inflow

Proceedings Papers

Analysis of Friction-Saturated Flutter Vibrations With a Fully-Coupled Frequency Domain Method

Christian Berthold, Johann Gross, Christian Frey, Malte Krack

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT24A032, September 21–25, 2020

Paper No: GT2020-16253

DOI: https://doi.org/10.1115/GT2020-16253

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Topics: Flutter (Aerodynamics), Friction, Vibration, Oscillations, Damping, Limit cycles, Aerodynamics, Algorithms, Boundary-value problems, Deflection

Journal Articles

Analysis of Friction-Saturated Flutter Vibrations With a Fully Coupled Frequency Domain Method

Christian Berthold, Johann Gross, Christian Frey, Malte Krack

J. Eng. Gas Turbines Power. November 2020, 142(11): 111007.

Paper No: GTP-20-1508

DOI: https://doi.org/10.1115/1.4048650

Published Online: October 20, 2020

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Topics: Aerodynamics, Damping, Deflection, Deformation, Flow (Dynamics), Fluid-dynamic forces, Flutter (Aerodynamics), Friction, Limit cycles, Shapes

Proceedings Papers

Aerodynamic Impact of Manufacturing Variation on a Nonaxisymmetric Multi-Passage Turbine Stage With Adjoint CFD

Alexander Liefke, Vincent Marciniak, Jan Backhaus, Christian Frey, Hanno Gottschalk, Uwe Janoske

Proc. ASME. GT2019, Volume 2D: Turbomachinery, V02DT46A017, June 17–21, 2019

Paper No: GT2019-91480

DOI: https://doi.org/10.1115/GT2019-91480

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Topics: Computational fluid dynamics, Manufacturing, Turbines, Blades, Computation, Design, High pressure (Physics), Simulation, Turbomachinery

Journal Articles

Investigation of the Impact of Unsteady Turbulence Effects on the Aeroelastic Analysis of a Low-Pressure Turbine Rotor Blade

Jan Philipp Heners, Damian M. Vogt, Christian Frey, Graham Ashcroft

J. Turbomach. October 2019, 141(10): 100801.

Paper No: TURBO-18-1307

DOI: https://doi.org/10.1115/1.4043950

Published Online: September 30, 2019

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Topics: Blades, Filters, Pressure, Rotors, Simulation, Turbulence, Flow (Dynamics)

Journal Articles

Forced Response Sensitivity Analysis Using an Adjoint Harmonic Balance Solver

Anna Engels-Putzka, Jan Backhaus, Christian Frey

J. Turbomach. March 2019, 141(3): 031014.

Paper No: TURBO-18-1260

DOI: https://doi.org/10.1115/1.4041700

Published Online: January 21, 2019

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Topics: Blades, Computation, Flow (Dynamics), Geometry, Rotors, Turbomachinery, Simulation, Turbines, Numerical analysis, Sensitivity analysis

Proceedings Papers

Forced Response Sensitivity Analysis Using an Adjoint Harmonic Balance Solver

Anna Engels-Putzka, Jan Backhaus, Christian Frey

Proc. ASME. GT2018, Volume 2C: Turbomachinery, V02CT42A040, June 11–15, 2018

Paper No: GT2018-76703

DOI: https://doi.org/10.1115/GT2018-76703

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Topics: Aerodynamic noise, Aerodynamics, Aeroelasticity, Blades, Computational fluid dynamics, Design, Geometry, Numerical analysis, Optimization, Sensitivity analysis

Proceedings Papers

Comparison of Linear and Nonlinear Frequency Domain Methods for Flutter Analysis

Hans-Peter Kersken, Graham Ashcroft, Christian Frey, Nina Wolfrum, Oliver Pütz

Proc. ASME. GT2018, Volume 2C: Turbomachinery, V02CT42A016, June 11–15, 2018

Paper No: GT2018-75626

DOI: https://doi.org/10.1115/GT2018-75626

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Topics: Flutter (Aerodynamics), Blades, Turbomachinery, Algorithms, Gas turbines, Jet engines, Pressure, Stability, Turbines

Proceedings Papers

On the Simulation of Unsteady Turbulence and Transition Effects in a Multistage Low Pressure Turbine: Part I — Verification and Validation

Graham Ashcroft, Christian Frey, Hans-Peter Kersken, Edmund Kügeler, Nina Wolfrum

Proc. ASME. GT2018, Volume 2C: Turbomachinery, V02CT42A042, June 11–15, 2018

Paper No: GT2018-76756

DOI: https://doi.org/10.1115/GT2018-76756

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Topics: Pressure, Simulation, Turbine components, Turbulence, Boundary-value problems, Turbines, Airfoils, Computational fluid dynamics, Flow (Dynamics), Unsteady flow

Proceedings Papers

On the Development of Harmonic Balance Methods for Multiple Fundamental Frequencies

Laura Junge, Graham Ashcroft, Hans-Peter Kersken, Christian Frey

Proc. ASME. GT2018, Volume 2C: Turbomachinery, V02CT42A012, June 11–15, 2018

Paper No: GT2018-75495

DOI: https://doi.org/10.1115/GT2018-75495

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Topics: Aerodynamic flow, Blades, Computer simulation, Flow (Dynamics), Fourier transforms, Modeling, Signals, Turbomachinery, Unsteady flow

Proceedings Papers

Mixing Losses in Steady and Unsteady Simulations of Turbomachinery Flows

Daniel Schlüß, Christian Frey

Proc. ASME. GT2018, Volume 2C: Turbomachinery, V02CT42A014, June 11–15, 2018

Paper No: GT2018-75524

DOI: https://doi.org/10.1115/GT2018-75524

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Topics: Engineering simulation, Flow (Dynamics), Simulation, Turbomachinery, Unsteady flow, Blades, Computation, Entropy, Acoustics, Approximation

Proceedings Papers

Coupled Fluid Structure Simulation Method in the Frequency Domain for Turbomachinery Applications

Christian Berthold, Christian Frey, Harald Schönenborn

Proc. ASME. GT2018, Volume 7C: Structures and Dynamics, V07CT36A014, June 11–15, 2018

Paper No: GT2018-76220

DOI: https://doi.org/10.1115/GT2018-76220

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Topics: Fluids, Simulation, Turbomachinery, Fluid structure interaction, Blades, Damping, Dynamics (Mechanics), Flow (Dynamics), Flutter (Aerodynamics), Stress

Proceedings Papers

Simulations of Unsteady Blade Row Interactions Using Linear and Non-Linear Frequency Domain Methods

Christian Frey, Graham Ashcroft, Hans-Peter Kersken

Proc. ASME. GT2015, Volume 2B: Turbomachinery, V02BT39A037, June 15–19, 2015

Paper No: GT2015-43453

DOI: https://doi.org/10.1115/GT2015-43453

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Topics: Blades, Simulation, Turbomachinery, Flow (Dynamics), Unsteady flow, Acoustics, Computational fluid dynamics, Rotors, Stators, Wheels

Proceedings Papers

On the Application of Frequency-Domain Methods to Multistage Turbomachinery

Laura Junge, Graham Ashcroft, Peter Jeschke, Christian Frey

Proc. ASME. GT2015, Volume 2B: Turbomachinery, V02BT39A027, June 15–19, 2015

Paper No: GT2015-42936

DOI: https://doi.org/10.1115/GT2015-42936

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Topics: Turbomachinery, Blades, Simulation, Compressors, Electromagnetic scattering, Modeling, Radiation scattering, Scattering (Physics), Unsteady flow, Aerodynamic flow

Proceedings Papers

Nonreflecting Boundary Conditions for Aeroelastic Analysis in Time and Frequency Domain 3D RANS Solvers

Hans-Peter Kersken, Graham Ashcroft, Christian Frey, Nina Wolfrum, Detlef Korte

Proc. ASME. GT2014, Volume 2B: Turbomachinery, V02BT39A010, June 16–20, 2014

Paper No: GT2014-25499

DOI: https://doi.org/10.1115/GT2014-25499

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Topics: Boundary-value problems, Reynolds-averaged Navier–Stokes equations, Approximation, Flow (Dynamics), Computation, Eigenfunctions, Engineering simulation, Flutter (Aerodynamics), Fourier transforms, Navier-Stokes equations

Proceedings Papers

A Harmonic Balance Technique for Multistage Turbomachinery Applications

Christian Frey, Graham Ashcroft, Hans-Peter Kersken, Christian Voigt

Proc. ASME. GT2014, Volume 2B: Turbomachinery, V02BT39A005, June 16–20, 2014

Paper No: GT2014-25230

DOI: https://doi.org/10.1115/GT2014-25230

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Topics: Turbomachinery, Blades, Simulation, Flow (Dynamics), Compressors, Noise (Sound), Vibration

Proceedings Papers

Adaption of Giles Non-Local Non-Reflecting Boundary Conditions for a Cell-Centered Solver for Turbomachinery Applications

Sebastian Robens, Peter Jeschke, Christian Frey, Edmund Kügeler, Arianna Bosco, Thomas Breuer

Proc. ASME. GT2013, Volume 6B: Turbomachinery, V06BT37A022, June 3–7, 2013

Paper No: GT2013-94957

DOI: https://doi.org/10.1115/GT2013-94957

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Topics: Boundary-value problems, Turbomachinery, Flow (Dynamics), Aerodynamics, Approximation, Blades, Compressors, Simulation, Turbines

Journal citation

NARROW

A New Harmonic Balance Approach Using Multidimensional Time

On the Formulation of Nonreflecting Boundary Conditions for Turbomachinery Configurations: Part I — Theory and Implementation

On the Formulation of Nonreflecting Boundary Conditions for Turbomachinery Configurations: Part II — Application and Analysis

A New Harmonic Balance Approach Using Multidimensional Time

Analysis of Friction-Saturated Flutter Vibrations With a Fully-Coupled Frequency Domain Method

Analysis of Friction-Saturated Flutter Vibrations With a Fully Coupled Frequency Domain Method

Aerodynamic Impact of Manufacturing Variation on a Nonaxisymmetric Multi-Passage Turbine Stage With Adjoint CFD

Investigation of the Impact of Unsteady Turbulence Effects on the Aeroelastic Analysis of a Low-Pressure Turbine Rotor Blade

Forced Response Sensitivity Analysis Using an Adjoint Harmonic Balance Solver

Forced Response Sensitivity Analysis Using an Adjoint Harmonic Balance Solver

Comparison of Linear and Nonlinear Frequency Domain Methods for Flutter Analysis

On the Simulation of Unsteady Turbulence and Transition Effects in a Multistage Low Pressure Turbine: Part I — Verification and Validation

On the Development of Harmonic Balance Methods for Multiple Fundamental Frequencies

Mixing Losses in Steady and Unsteady Simulations of Turbomachinery Flows

Coupled Fluid Structure Simulation Method in the Frequency Domain for Turbomachinery Applications

Simulations of Unsteady Blade Row Interactions Using Linear and Non-Linear Frequency Domain Methods

On the Application of Frequency-Domain Methods to Multistage Turbomachinery

Nonreflecting Boundary Conditions for Aeroelastic Analysis in Time and Frequency Domain 3D RANS Solvers

A Harmonic Balance Technique for Multistage Turbomachinery Applications

Adaption of Giles Non-Local Non-Reflecting Boundary Conditions for a Cell-Centered Solver for Turbomachinery Applications

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