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Journal Articles

The New Chapter of Transonic Compressor Cascade Design at the DLR

Edwin J. Munoz Lopez, Alexander Hergt, Sebastian Grund, Volker Gümmer
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. August 2023, 145(8): 081001.
Paper No: TURBO-22-1193
DOI: https://doi.org/10.1115/1.4056982
Published Online: April 3, 2023
View Article titled, The New Chapter of Transonic Compressor Cascade Design at the DLR
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Topics: Cascades (Fluid dynamics), Compressors, Design, Optimization, Computational fluid dynamics, Airfoils, Pressure
Journal Articles

Numerical Investigation of Near-Tip Modifications for a Highly Loaded Low-Speed Rotor Under the Influence of Double Leakage

Jannik Eckel, Philipp von Jeinsen, Volker Gümmer
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. April 2023, 145(4): 041003.
Paper No: TURBO-22-1204
DOI: https://doi.org/10.1115/1.4055651
Published Online: November 3, 2022
View Article titled, Numerical Investigation of Near-Tip Modifications for a Highly Loaded Low-Speed Rotor Under the Influence of Double Leakage
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Topics: Blades, Design, Entropy, Flow (Dynamics), Leakage, Pressure, Rotors, Vortices, Compressors
Proceedings Papers

Numerical Investigation of Near-Tip Modifications for a Highly-Loaded Low-Speed Rotor Under the Influence of Double Leakage

Jannik Eckel, Philipp von Jeinsen, Volker Gümmer
Proc. ASME. GT2022, Volume 10A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V10AT29A023, June 13–17, 2022
Paper No: GT2022-82143
DOI: https://doi.org/10.1115/GT2022-82143
View Paper titled, Numerical Investigation of Near-Tip Modifications for a Highly-Loaded Low-Speed Rotor Under the Influence of Double Leakage
Click here to open pdf in another window PDF for Numerical Investigation of Near-Tip Modifications for a Highly-Loaded Low-Speed Rotor Under the Influence of Double Leakage
Topics: Compressors, Flow (Dynamics), Leakage, Rotors, Vortices
Proceedings Papers

Numerical Analysis of Blade Platform Leakage in Axial Compressors

Jannik Petermann, Marvin Pommerening, Volker Gümmer, Bernd Becker
Proc. ASME. GT2022, Volume 10A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V10AT29A004, June 13–17, 2022
Paper No: GT2022-78443
DOI: https://doi.org/10.1115/GT2022-78443
View Paper titled, Numerical Analysis of Blade Platform Leakage in Axial Compressors
Click here to open pdf in another window PDF for Numerical Analysis of Blade Platform Leakage in Axial Compressors
Topics: Blades, Compressors, Geometry, Leakage, Numerical analysis
Proceedings Papers

Design of a Blowing Type Flow Treatment to Complement Casing Treatments for Compact High-Pressure Compressor Rear Stages

Christian P. Köhler, Christofer Kendall-Torry, Christian Helcig, Volker Gümmer
Proc. ASME. GT2022, Volume 10A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V10AT29A002, June 13–17, 2022
Paper No: GT2022-78311
DOI: https://doi.org/10.1115/GT2022-78311
View Paper titled, Design of a Blowing Type Flow Treatment to Complement Casing Treatments for Compact High-Pressure Compressor Rear Stages
Click here to open pdf in another window PDF for Design of a Blowing Type Flow Treatment to Complement Casing Treatments for Compact High-Pressure Compressor Rear Stages
Topics: Compressors, Design, Flow (Dynamics), High pressure (Physics), Rotors, Stators, Corners (Structural elements), Delays, Engineering simulation, Experimental design
Proceedings Papers

Analysis of Cavity Leakage Effects on Coupled Non-Axisymmetric Endwall-Airfoil Optimization in a Low-Speed Compressor Tandem Stator

Mattia Straccia, Samuele Giannini, Volker Gümmer
Proc. ASME. GT2022, Volume 10C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V10CT32A027, June 13–17, 2022
Paper No: GT2022-82418
DOI: https://doi.org/10.1115/GT2022-82418
View Paper titled, Analysis of Cavity Leakage Effects on Coupled Non-Axisymmetric Endwall-Airfoil Optimization in a Low-Speed Compressor Tandem Stator
Click here to open pdf in another window PDF for Analysis of Cavity Leakage Effects on Coupled Non-Axisymmetric Endwall-Airfoil Optimization in a Low-Speed Compressor Tandem Stator
Topics: Airfoils, Cavities, Compressors, Leakage, Optimization, Stators, Flow (Dynamics), Design, Leakage flows, Geometry
Journal Articles

Numerical Calibration and Investigation of the Influence of Reynolds Number on Measurements With Five-Hole Probes in Compressible Flows

Christian Schäffer, Konstantin Speck, Volker Gümmer
Journal: Journal of Turbomachinery
Article Type: Research Papers
J. Turbomach. September 2022, 144(9): 091010.
Paper No: TURBO-21-1169
DOI: https://doi.org/10.1115/1.4053835
Published Online: March 4, 2022
View Article titled, Numerical Calibration and Investigation of the Influence of Reynolds Number on Measurements With Five-Hole Probes in Compressible Flows
Click here to open pdf in another window PDF for Numerical Calibration and Investigation of the Influence of Reynolds Number on Measurements With Five-Hole Probes in Compressible Flows
Topics: Calibration, Pressure, Probes, Reynolds number, Yaw, Errors, Geometry
Proceedings Papers

Numerical Investigation of the Aerodynamic Performance of Hybrid Aerofoils in a 1.5-Stage Low-Speed Compressor

Jannik Eckel, Volker Gümmer
Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A008, June 7–11, 2021
Paper No: GT2021-58657
DOI: https://doi.org/10.1115/GT2021-58657
View Paper titled, Numerical Investigation of the Aerodynamic Performance of Hybrid Aerofoils in a 1.5-Stage Low-Speed Compressor
Click here to open pdf in another window PDF for Numerical Investigation of the Aerodynamic Performance of Hybrid Aerofoils in a 1.5-Stage Low-Speed Compressor
Topics: Airfoils, Compressors, Flow (Dynamics), Reynolds-averaged Navier–Stokes equations, Steady state
Proceedings Papers

Endwall Boundary Layer Development in a Multistage Low-Speed Compressor With Tandem Stator Vanes

Michael Hopfinger, Volker Gümmer
Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A014, June 7–11, 2021
Paper No: GT2021-58742
DOI: https://doi.org/10.1115/GT2021-58742
View Paper titled, Endwall Boundary Layer Development in a Multistage Low-Speed Compressor With Tandem Stator Vanes
Click here to open pdf in another window PDF for Endwall Boundary Layer Development in a Multistage Low-Speed Compressor With Tandem Stator Vanes
Topics: Boundary layers, Compressors, Stators, Flow (Dynamics), Airfoils, Design, Shear stress
Proceedings Papers

Numerical Evaluation of Losses in Shrouded and Cantilevered Stators of a Multi-Stage Axial Compressor

Ilaria De Dominicis, Sebastian Robens, Volker Gümmer
Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A003, June 7–11, 2021
Paper No: GT2021-58388
DOI: https://doi.org/10.1115/GT2021-58388
View Paper titled, Numerical Evaluation of Losses in Shrouded and Cantilevered Stators of a Multi-Stage Axial Compressor
Click here to open pdf in another window PDF for Numerical Evaluation of Losses in Shrouded and Cantilevered Stators of a Multi-Stage Axial Compressor
Topics: Compressors, Stators, Flow (Dynamics), Leakage, Pressure, Cavities, Computational fluid dynamics, Engineering simulation, Engineers, Entropy
Proceedings Papers

Numerical Calibration and Investigation of the Influence Of Reynolds Number on Measurements With Five-Hole Probes In Compressible Flows

Christian Schäffer, Konstantin Speck, Volker Gümmer
Proc. ASME. GT2021, Volume 4: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage; Education; Electric Power, V004T05A002, June 7–11, 2021
Paper No: GT2021-58618
DOI: https://doi.org/10.1115/GT2021-58618
View Paper titled, Numerical Calibration and Investigation of the Influence Of Reynolds Number on Measurements With Five-Hole Probes In Compressible Flows
Click here to open pdf in another window PDF for Numerical Calibration and Investigation of the Influence Of Reynolds Number on Measurements With Five-Hole Probes In Compressible Flows
Topics: Calibration, Compressible flow, Probes, Reynolds number
Proceedings Papers

Coupling of Endwall and Aerofoil Optimisation on a Low-Speed Compressor Tandem Stator

Mattia Straccia, Volker Gümmer
Proc. ASME. GT2021, Volume 2D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V02DT36A009, June 7–11, 2021
Paper No: GT2021-59058
DOI: https://doi.org/10.1115/GT2021-59058
View Paper titled, Coupling of Endwall and Aerofoil Optimisation on a Low-Speed Compressor Tandem Stator
Click here to open pdf in another window PDF for Coupling of Endwall and Aerofoil Optimisation on a Low-Speed Compressor Tandem Stator
Topics: Airfoils, Compressors, Optimization, Stators, Flow (Dynamics), Geometry, Blades, Design, Shapes, Algorithms
Proceedings Papers

Experimental Investigation of the Starting Procedure of a Helicopter Gas Turbine Featuring an Impingement Quick-Start System

Niklas Kuen, Volker Gümmer
Proc. ASME. GT2020, Volume 5: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage, V005T06A038, September 21–25, 2020
Paper No: GT2020-16231
DOI: https://doi.org/10.1115/GT2020-16231
View Paper titled, Experimental Investigation of the Starting Procedure of a Helicopter Gas Turbine Featuring an Impingement Quick-Start System
Click here to open pdf in another window PDF for Experimental Investigation of the Starting Procedure of a Helicopter Gas Turbine Featuring an Impingement Quick-Start System
Topics: Gas turbines, Engines, Flight, Fuels, Helicopters, Safety, Weight (Mass)
Proceedings Papers

Reduced-Order Modelling of Rotating Stall

Dominik Schlüter, Robert P. Grewe, Fabian Wartzek, Alexander Liefke, Jan Werner, Christian Kunkel, Volker Gümmer
Proc. ASME. GT2020, Volume 2E: Turbomachinery, V02ET41A011, September 21–25, 2020
Paper No: GT2020-14459
DOI: https://doi.org/10.1115/GT2020-14459
View Paper titled, Reduced-Order Modelling of Rotating Stall
Click here to open pdf in another window PDF for Reduced-Order Modelling of Rotating Stall
Topics: Clocks, Compressors, Computation, Computational fluid dynamics, Computer simulation, Errors, Flow (Dynamics), Modeling, Pressure, Reynolds-averaged Navier–Stokes equations
Proceedings Papers

Optimization Design Analysis of Primary Surface Recuperator for Rotorcraft Powerplant Applications

Chengyu Zhang, Volker Gümmer
Proc. ASME. GT2019, Volume 5B: Heat Transfer, V05BT22A004, June 17–21, 2019
Paper No: GT2019-90842
DOI: https://doi.org/10.1115/GT2019-90842
View Paper titled, Optimization Design Analysis of Primary Surface Recuperator for Rotorcraft Powerplant Applications
Click here to open pdf in another window PDF for Optimization Design Analysis of Primary Surface Recuperator for Rotorcraft Powerplant Applications
Topics: Design, Optimization, Power stations, Aircraft engines, Fuel consumption, Gas turbines, Genetic algorithms, Pressure drop, Shapes, Stress
Proceedings Papers

Reducing Compressor Shroud Leakage Flows by Raising the Stator Hub Line: Low Speed Tests

Henner Schrapp, Arne Dodegge, Volker Gümmer, Neil W. Harvey, Jörn Städing, Jens Friedrichs
Proc. ASME. GT2019, Volume 2A: Turbomachinery, V02AT39A032, June 17–21, 2019
Paper No: GT2019-91611
DOI: https://doi.org/10.1115/GT2019-91611
View Paper titled, Reducing Compressor Shroud Leakage Flows by Raising the Stator Hub Line: Low Speed Tests
Click here to open pdf in another window PDF for Reducing Compressor Shroud Leakage Flows by Raising the Stator Hub Line: Low Speed Tests
Topics: Compressors, Leakage flows, Stators, Pressure, Flow (Dynamics), Cavities, Design, Wind, Annulus, Boundary layers
Proceedings Papers

New Methods for Secondary Flow Phenomena Visualization and Analysis

Mattia Straccia, Rodolfo Hofmann, Volker Gümmer
Proc. ASME. GT2019, Volume 2C: Turbomachinery, V02CT41A029, June 17–21, 2019
Paper No: GT2019-91378
DOI: https://doi.org/10.1115/GT2019-91378
View Paper titled, New Methods for Secondary Flow Phenomena Visualization and Analysis
Click here to open pdf in another window PDF for New Methods for Secondary Flow Phenomena Visualization and Analysis
Topics: Flow (Dynamics), Visualization, Vortices, Turbulence, Boundary layers, Rotors, Shock (Mechanics), Design, Engineering simulation, Equilibrium (Physics)
Proceedings Papers

Structural Analysis of an Auxetic Casing Structure Incorporating Tip Blowing Casing Treatment Modification

Tobias Schmidt, Jan Lorenz, Volker Gümmer, Andreas Hupfer
Proc. ASME. GT2019, Volume 7A: Structures and Dynamics, V07AT30A006, June 17–21, 2019
Paper No: GT2019-91272
DOI: https://doi.org/10.1115/GT2019-91272
View Paper titled, Structural Analysis of an Auxetic Casing Structure Incorporating Tip Blowing Casing Treatment Modification
Click here to open pdf in another window PDF for Structural Analysis of an Auxetic Casing Structure Incorporating Tip Blowing Casing Treatment Modification
Topics: Structural analysis, Stress, Clearances (Engineering), Compressors, Design, Additive manufacturing, Stability, Aircraft engines, Construction, Fatigue
Proceedings Papers

Evaluation of the Fuel Saving Potential Regarding Recuperated Helicopter Flight Conditions

Chengyu Zhang, Martin Kerler, Volker Gümmer
Proc. ASME. GT2018, Volume 1: Aircraft Engine; Fans and Blowers; Marine, V001T01A012, June 11–15, 2018
Paper No: GT2018-75637
DOI: https://doi.org/10.1115/GT2018-75637
View Paper titled, Evaluation of the Fuel Saving Potential Regarding Recuperated Helicopter Flight Conditions
Click here to open pdf in another window PDF for Evaluation of the Fuel Saving Potential Regarding Recuperated Helicopter Flight Conditions
Topics: Flight, Fuels, Weight (Mass), Cycles, Engines, Electromagnetic weapons, Gas turbines, Simulation, Aircraft, Compressed air
Journal Articles

Influencing Parameters of Tip Blowing Interacting With Rotor Tip Flow

Cyril Guinet, André Inzenhofer, Volker Gümmer
Journal: Journal of Turbomachinery
Article Type: Research-Article
J. Turbomach. February 2017, 139(2): 021010.
Paper No: TURBO-16-1111
DOI: https://doi.org/10.1115/1.4034699
Published Online: October 26, 2016
View Article titled, Influencing Parameters of Tip Blowing Interacting With Rotor Tip Flow
Click here to open pdf in another window PDF for Influencing Parameters of Tip Blowing Interacting With Rotor Tip Flow
Topics: Blades, Design, Flow (Dynamics), Nozzles, Pressure, Rotors, Compressors, Simulation