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Proceedings Papers

Impact of Off-Design Performance of Turbines on Organic-Rankine Cycle Simulations for Solar-Power Applications

Erdal Yildirim, Stefan aus der Wiesche, Mehmet Azmi Aktacir
Proc. ASME. GT2024, Volume 5: Cycle Innovations, V005T06A024, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-127198
https://doi.org/10.1115/GT2024-127198
View Paper titled, Impact of Off-Design Performance of Turbines on Organic-Rankine Cycle Simulations for Solar-Power Applications
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Topics: Cycles, Design, Organic Rankine cycle, Simulation, Solar power, Thermal efficiency, Turbines, Heat, Stress, Electric power generation
Proceedings Papers

Roughness Effects on Dense-Gas Turbine Flow: Comparison of Experiments and Simulations

Xavier Gloerfelt, Leander Hake, Aurélien Bienner, Camille Matar, Paola Cinnella, Stefan aus der Wiesche
Proc. ASME. GT2024, Volume 12B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing, V12BT30A022, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-125144
https://doi.org/10.1115/GT2024-125144
View Paper titled, Roughness Effects on Dense-Gas Turbine Flow: Comparison of Experiments and Simulations
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Topics: Cascades (Fluid dynamics), Flow (Dynamics), Organic Rankine cycle, Simulation, Surface roughness, Turbines
Proceedings Papers

Investigation of a Transonic Dense Gas Flow Over an Idealized Blade Vane Configuration

Leander Hake, Stefan aus der Wiesche, Stephan Sundermeier, Maximilian Passmann, Aurelien Bienner, Xavier Gloerfelt, Paola Cinnella
Proc. ASME. GT2024, Volume 12B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing, V12BT30A035, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-127215
https://doi.org/10.1115/GT2024-127215
View Paper titled, Investigation of a Transonic Dense Gas Flow Over an Idealized Blade Vane Configuration
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Topics: Blades, Flow (Dynamics), Gas flow, Pressure, Airfoils, Compressibility, Computer simulation, Cycles, Mach number, Organic Rankine cycle
Proceedings Papers

Influence of Casing Roughness on the Tip-Leakage Loss in a Linear Turbine Cascade

Lukas Huser, Stefan aus der Wiesche, Markus Schatz
Proc. ASME. GT2023, Volume 13B: Turbomachinery — Axial Flow Turbine Aerodynamics, V13BT30A027, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103119
https://doi.org/10.1115/GT2023-103119
View Paper titled, Influence of Casing Roughness on the Tip-Leakage Loss in a Linear Turbine Cascade
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Topics: Cascades (Fluid dynamics), Leakage, Probes, Surface roughness, Turbines
Journal Articles

Hot-Wire Anemometry in High Subsonic Organic Vapor Flows

Leander Hake, Stefan aus der Wiesche, Stephan Sundermeier, Leon Cakievski, Joshua Bäumer, Paola Cinnella, Camille Matar, Xavier Gloerfelt
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2023, 145(9): 091010.
Paper No: TURBO-22-1346
https://doi.org/10.1115/1.4062676
Published Online: June 26, 2023
View Article titled, Hot-Wire Anemometry in High Subsonic Organic Vapor Flows
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Topics: Calibration, Flow (Dynamics), Mach number, Temperature, Vapors, Wire, Reynolds number, Heat transfer, Probes, Wind tunnels
Proceedings Papers

Flow Through a Steam Turbine Cascade With a Single Damaged Blade: Effect of Blade Height on Loss and Outflow Angle Distribution

Michael Schmalacker, Leon Cakievski, Stefan aus der Wiesche, Markus Schatz
Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T20A008, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80950
https://doi.org/10.1115/GT2022-80950
View Paper titled, Flow Through a Steam Turbine Cascade With a Single Damaged Blade: Effect of Blade Height on Loss and Outflow Angle Distribution
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Topics: Blades, Cascades (Fluid dynamics), Damage, Flow (Dynamics), Leakage, Outflow, Steam turbines
Proceedings Papers

Hot-Wire Anemometry in High Subsonic Organic Vapor Flows

Leander Hake, Stephan Sundermeier, Leon Cakievski, Joshua Bäumer, Stefan aus der Wiesche, Camille Matar, Paola Cinnella, Xavier Gloerfelt
Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T05A007, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-81686
https://doi.org/10.1115/GT2022-81686
View Paper titled, Hot-Wire Anemometry in High Subsonic Organic Vapor Flows
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Topics: Calibration, Flow (Dynamics), Organic Rankine cycle, Vapors, Wire
Journal Articles

Numerical Model of the Railway Brake Disk for the Temperature and Axial Thermal Stress Analyses

Yusuf Cati, Stefan aus der Wiesche, Mesut Düzgün
Journal: Journal of Thermal Science and Engineering Applications
Publisher: ASME
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. October 2022, 14(10): 101014.
Paper No: TSEA-21-1690
https://doi.org/10.1115/1.4054213
Published Online: April 12, 2022
View Article titled, Numerical Model of the Railway Brake Disk for the Temperature and Axial Thermal Stress Analyses
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Topics: Disks, Temperature, Thermal stresses, Temperature distribution, Computer simulation, Railway brakes, Brakes
Proceedings Papers

Profile Loss of a Printed Transonic Turbine Cascade

Leander Hake, Stefan aus der Wiesche
Proc. ASME. IMECE2021, Volume 10: Fluids Engineering, V010T10A011, November 1–5, 2021
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2021-70215
https://doi.org/10.1115/IMECE2021-70215
View Paper titled, Profile Loss of a Printed Transonic Turbine Cascade
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Topics: Cascades (Fluid dynamics), Steam, Surface roughness, Turbines, Vapors, Additive manufacturing, Carbon, Flow (Dynamics), Superheating, Surface quality
Proceedings Papers

Experimental Investigation of High-Speed Flows Past Pillow Plates

Stephan Sundermeier, Stefan aus der Wiesche
Proc. ASME. IMECE2021, Volume 10: Fluids Engineering, V010T10A002, November 1–5, 2021
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2021-70223
https://doi.org/10.1115/IMECE2021-70223
View Paper titled, Experimental Investigation of High-Speed Flows Past Pillow Plates
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Topics: Flow (Dynamics), Plates (structures), Heat exchangers, Heat transfer, Mach number, Pressure drop, Schlieren methods
Proceedings Papers

Critical and Choking Mach Numbers for Organic Vapor Flows Through Turbine Cascades

Stefan aus der Wiesche, Felix Reinker, Robert Wagner, Leander Hake, Max Passmann
Proc. ASME. GT2021, Volume 4: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage; Education; Electric Power, V004T06A003, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59013
https://doi.org/10.1115/GT2021-59013
View Paper titled, Critical and Choking Mach Numbers for Organic Vapor Flows Through Turbine Cascades
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Topics: Flow (Dynamics), Mach number, Turbines, Vapors
Journal Articles

Effect of Reynolds Number on Five-Hole Probe Performance: Experimental Study of the Open-Access Oxford Probe

Maximilian Passmann, Stefan aus der Wiesche, Thomas Povey, Detlef Bergmann
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2021, 143(9): 091003.
Paper No: TURBO-20-1376
https://doi.org/10.1115/1.4050597
Published Online: May 3, 2021
View Article titled, Effect of Reynolds Number on Five-Hole Probe Performance: Experimental Study of the Open-Access Oxford Probe
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Topics: Calibration, Probes, Reynolds number, Pressure, Flow (Dynamics), Errors
Journal Articles

Numerical Calibration of Three-Dimensional Printed Five-Hole Probes for the Transonic Flow Regime

Maximilian Passmann, Stefan aus der Wiesche, Franz Joos
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. May 2021, 143(5): 051501.
Paper No: FE-20-1439
https://doi.org/10.1115/1.4049680
Published Online: February 8, 2021
View Article titled, Numerical Calibration of Three-Dimensional Printed Five-Hole Probes for the Transonic Flow Regime
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Topics: Calibration, Mach number, Pressure, Probes, Flow (Dynamics)
Proceedings Papers

A Simplified Model for Predicting Natural Draft Wet Cooling Tower Performance of Large Steam Power Plants

Stefan aus der Wiesche
Proc. ASME. GT2020, Volume 9: Oil and Gas Applications; Organic Rankine Cycle Power Systems; Steam Turbine, V009T23A020, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15369
https://doi.org/10.1115/GT2020-15369
View Paper titled, A Simplified Model for Predicting Natural Draft Wet Cooling Tower Performance of Large Steam Power Plants
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Topics: Cooling towers, Simulation, Thermal power stations
Proceedings Papers

Effect of Reynolds Number on Five-Hole Probe Performance: Experimental Study of the Open-Access Oxford Probe

Maximilian Passmann, Stefan aus der Wiesche, Thomas Povey, Detlef Bergmann
Proc. ASME. GT2020, Volume 5: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage, V005T05A028, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-16074
https://doi.org/10.1115/GT2020-16074
View Paper titled, Effect of Reynolds Number on Five-Hole Probe Performance: Experimental Study of the Open-Access Oxford Probe
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Topics: Calibration, Probes, Reynolds number
Journal Articles

Stagnation Flow and Heat Transfer From a Finite Disk Situated Perpendicular to a Uniform Stream

Stefan aus der Wiesche, Christian Helcig
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. March 2020, 142(3): 031108.
Paper No: FE-19-1652
https://doi.org/10.1115/1.4045862
Published Online: January 24, 2020
View Article titled, Stagnation Flow and Heat Transfer From a Finite Disk Situated Perpendicular to a Uniform Stream
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Topics: Boundary layers, Disks, Flow (Dynamics), Heat transfer, Stagnation flow, Prandtl number, Water, Model basin
Proceedings Papers

Numerical Verification of the Thermodynamic Determination of the Hydraulic Efficiency of Radial Fans

Philipp Epple, Manuel Fritsche, Felix Reinker, Stefan aus der Wiesche
Proc. ASME. IMECE2019, Volume 7: Fluids Engineering, V007T08A060, November 11–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2019-11417
https://doi.org/10.1115/IMECE2019-11417
View Paper titled, Numerical Verification of the Thermodynamic Determination of the Hydraulic Efficiency of Radial Fans
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Topics: Fans
Proceedings Papers

Assessment of Compressible RANS and LES Methods for Organic Vapor Flows Past a NACA4412 Airfoil

Karsten Hasselmann, Stefan aus der Wiesche, Eugeny Y. Kenig
Proc. ASME. AJKFluids2019, Volume 2: Computational Fluid Dynamics, V002T02A055, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-4843
https://doi.org/10.1115/AJKFluids2019-4843
View Paper titled, Assessment of Compressible RANS and LES Methods for Organic Vapor Flows Past a NACA4412 Airfoil
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Topics: Airfoils, Flow (Dynamics), Reynolds-averaged Navier–Stokes equations, Vapors, Simulation, Mach number, Computational fluid dynamics, Fluids, Speed of sound, Density
Proceedings Papers

An Accurate Thermal Measurement Approach for Determining Fan Efficiencies Based on System Identification

Stefan aus der Wiesche, Felix Reinker, Robert Wagner, Philipp Epple, Manuel Fritsche, Hans Jörg Russwurm
Proc. ASME. AJKFluids2019, Volume 3A: Fluid Applications and Systems, V03AT03A014, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-4613
https://doi.org/10.1115/AJKFluids2019-4613
View Paper titled, An Accurate Thermal Measurement Approach for Determining Fan Efficiencies Based on System Identification
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Topics: Design, Performance, Signals, Temperature, Temperature measurement, Testing performance, Transients (Dynamics)
Proceedings Papers

CFD-Simulation of Centrifugal Fan Performance Characteristics Using Ideal and Real Gas Models for Air and Organic Fluids

Manuel Fritsche, Philipp Epple, Karsten Hasselmann, Felix Reinker, Robert Wagner, Stefan aus der Wiesche, Hans Russwurm
Proc. ASME. AJKFluids2019, Volume 3A: Fluid Applications and Systems, V03AT03A020, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-4815
https://doi.org/10.1115/AJKFluids2019-4815
View Paper titled, CFD-Simulation of Centrifugal Fan Performance Characteristics Using Ideal and Real Gas Models for Air and Organic Fluids
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Topics: Computational fluid dynamics, Fluids, Performance characterization, Simulation