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Journal Articles

Using Pseudotime Marching for the Solution of Harmonic Balance Problems

Christian Frey, Jan Backhaus, Graham Ashcroft, Georg Geiser, Benjamin Winhart, Heinrich Stüer
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2025, 147(9): 091007.
Paper No: TURBO-24-1275
https://doi.org/10.1115/1.4067519
Published Online: February 13, 2025
View Article titled, Using Pseudotime Marching for the Solution of Harmonic Balance Problems
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Topics: Flow (Dynamics), Robustness, Turbochargers, Unsteady flow, Errors, Computation, Computational fluid dynamics, Linear systems, Simulation, Compressors
Proceedings Papers

Using Pseudotime Marching for the Solution of Harmonic Balance Problems

Christian Frey, Jan Backhaus, Graham Ashcroft, Georg Geiser, Benjamin Winhart, Heinrich Stüer
Proc. ASME. GT2024, Volume 12C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V12CT32A038, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-127820
https://doi.org/10.1115/GT2024-127820
View Paper titled, Using Pseudotime Marching for the Solution of Harmonic Balance Problems
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Topics: Aeroelasticity, Compressors, Computational fluid dynamics, Errors, Flow (Dynamics), Jacobian matrices, Linear systems, Oscillations, Robustness, Scalars
Proceedings Papers

Investigating the Nature and Invariance of Field Inversion Based on Transition in a Turbine Cascade

Alexander Bleh, Jan Backhaus, Christian Morsbach
Proc. ASME. GT2022, Volume 10D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Turbomachinery General Interest; Unsteady Flows in Turbomachinery, V10DT34A018, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-82917
https://doi.org/10.1115/GT2022-82917
View Paper titled, Investigating the Nature and Invariance of Field Inversion Based on Transition in a Turbine Cascade
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Topics: Cascades (Fluid dynamics), Turbines, Databases, Errors, Flow (Dynamics), Modeling, Turbulence
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
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91480
https://doi.org/10.1115/GT2019-91480
View Paper titled, Aerodynamic Impact of Manufacturing Variation on a Nonaxisymmetric Multi-Passage Turbine Stage With Adjoint CFD
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Topics: Computational fluid dynamics, Manufacturing, Turbines, Blades, Computation, Design, High pressure (Physics), Simulation, Turbomachinery
Journal Articles

Forced Response Sensitivity Analysis Using an Adjoint Harmonic Balance Solver

Anna Engels-Putzka, Jan Backhaus, Christian Frey
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. March 2019, 141(3): 031014.
Paper No: TURBO-18-1260
https://doi.org/10.1115/1.4041700
Published Online: January 21, 2019
View Article titled, Forced Response Sensitivity Analysis Using an Adjoint Harmonic Balance Solver
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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
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-76703
https://doi.org/10.1115/GT2018-76703
View Paper titled, Forced Response Sensitivity Analysis Using an Adjoint Harmonic Balance Solver
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Topics: Aerodynamic noise, Aerodynamics, Aeroelasticity, Blades, Computational fluid dynamics, Design, Geometry, Numerical analysis, Optimization, Sensitivity analysis
Proceedings Papers

Gradient Enhanced Surrogate Models Based on Adjoint CFD Methods for the Design of a Counter Rotating Turbofan

Jan Backhaus, Marcel Aulich, Christian Frey, Timea Lengyel, Christian Voß
Proc. ASME. GT2012, Volume 8: Turbomachinery, Parts A, B, and C, 2319-2329, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-69706
https://doi.org/10.1115/GT2012-69706
View Paper titled, Gradient Enhanced Surrogate Models Based on Adjoint CFD Methods for the Design of a Counter Rotating Turbofan
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Topics: Computational fluid dynamics, Design, Turbofans, Optimization, Artificial neural networks, Computer-aided design, Function approximation, Modeling, Reynolds-averaged Navier–Stokes equations, Shapes
Proceedings Papers

Adjoint-Based Flow Sensitivity Analyis Using Arbitrary Control Surfaces

Christian Frey, Graham Ashcroft, Jan Backhaus, Edmund Ku¨geler, Jens Wellner
Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 1067-1076, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45041
https://doi.org/10.1115/GT2011-45041
View Paper titled, Adjoint-Based Flow Sensitivity Analyis Using Arbitrary Control Surfaces
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Topics: Flow (Dynamics), Blades, Pressure