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Proceedings Papers

Gaseous and Particulate Emissions of an Allison 250-C20B Turboshaft Engine Running on HEFA-SPK and its Jet A-1 Blends

Alexander Rabl, Marius Rohkamp, Mohammad Reza Saraji-Bozorgzad, Christian Helcig, Reetu Sallinen, Jesse Vilja, Jan Bendl, Thomas Adam, Andreas Hupfer, Volker Gümmer
Proc. ASME. GT2024, Volume 2: Ceramics and Ceramic Composites; Coal, Biomass, Hydrogen, and Alternative Fuels, V002T03A022, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-126719
https://doi.org/10.1115/GT2024-126719
View Paper titled, Gaseous and Particulate Emissions of an Allison 250-C20B Turboshaft Engine Running on HEFA-SPK and its Jet A-1 Blends
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Topics: Emissions, Engines, Particulate matter, Soot, Sustainable aviation fuels
Journal Articles

Detailed Gaseous and Particulate Emissions of an Allison 250-C20B Turboshaft Engine

Marius Rohkamp, Alexander Rabl, Benedikt Gündling, Mohammad Reza Saraji-Bozorgzad, Christopher Mull, Jan Bendl, Carsten Neukirchen, Christian Helcig, Thomas Adam, Volker Gümmer, Andreas Hupfer
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2024, 146(4): 041009.
Paper No: GTP-23-1459
https://doi.org/10.1115/1.4063693
Published Online: December 8, 2023
View Articletitled, Detailed Gaseous and Particulate Emissions of an Allison 250-C20B Turboshaft Engine
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Topics: Emissions, Engines, Particulate matter
Proceedings Papers

Challenges in the Application of Hot-Wire Anemometry for the Investigation of Transient Temperature Fluctuations in a High-Speed Research Compressor

Christian Schäffer, Alexander Rabl, Konstantin Speck, Kiyan Boetzel, Christian Helcig, Volker Gümmer
Proc. ASME. GT2023, Volume 4: Controls, Diagnostics, and Instrumentation, V004T05A003, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-100970
https://doi.org/10.1115/GT2023-100970
View Paper titled, Challenges in the Application of Hot-Wire Anemometry for the Investigation of Transient Temperature Fluctuations in a High-Speed Research Compressor
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Topics: Compressors, Contamination, Fluctuations (Physics), Temperature, Temperature measurement, Transients (Dynamics), Vibration, Wire
Proceedings Papers

Detailed Gaseous and Particulate Emissions of an Allison 250-C20B Turboshaft Engine

Marius Rohkamp, Alexander Rabl, Benedikt Gündling, Mohammad Reza Saraji-Bozorgzad, Christopher Mull, Jan Bendl, Carsten Neukirchen, Christian Helcig, Thomas Adam, Volker Gümmer, Andreas Hupfer
Proc. ASME. GT2023, Volume 3A: Combustion, Fuels, and Emissions, V03AT04A019, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101273
https://doi.org/10.1115/GT2023-101273
View Paper titled, Detailed Gaseous and Particulate Emissions of an Allison 250-C20B Turboshaft Engine
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Topics: Emissions, Engines, Particulate matter, Soot
Proceedings Papers

Investigation of the Effect of Blade Passing on Two-Phase Flow Within Discrete Compressor Casing Recirculation Channel Using Particle Image Velocimetry

Carlos Eduardo Ribeiro Santa Cruz Mendoza, I. Bedii Ozdemir, Christian Helcig, Volker Gümmer
Proc. ASME. GT2023, Volume 13A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V13AT29A025, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102553
https://doi.org/10.1115/GT2023-102553
View Paper titled, Investigation of the Effect of Blade Passing on Two-Phase Flow Within Discrete Compressor Casing Recirculation Channel Using Particle Image Velocimetry
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Topics: Blades, Compressors, Flow (Dynamics), Particulate matter, Two-phase flow
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
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-78311
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
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Topics: Compressors, Design, Flow (Dynamics), High pressure (Physics), Rotors, Stators, Corners (Structural elements), Delays, Engineering simulation, Experimental design
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 Articletitled, 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
Journal Articles

Prandtl Number Effect on the Laminar Convective Heat Transfer From a Rotating Disk

Christian Helcig, Stefan aus der Wiesche, Igor V. Shevchuk
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. October 2017, 139(10): 101702.
Paper No: HT-16-1633
https://doi.org/10.1115/1.4036729
Published Online: June 6, 2017
View Articletitled, Prandtl Number Effect on the Laminar Convective Heat Transfer From a Rotating Disk
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Topics: Convection, Design, Disks, Heat transfer, Natural convection, Prandtl number, Rotating disks, Temperature, Water, Fluids
Proceedings Papers

Experimental Investigation of the Laminar Boundary Layer Flow on a Rotating Wavy Disk

Christian Helcig, Christian Teigeler, Stefan aus der Wiesche
Proc. ASME. FEDSM2016, Volume 1B, Symposia: Fluid Mechanics (Fundamental Issues and Perspectives; Industrial and Environmental Applications); Multiphase Flow and Systems (Multiscale Methods; Noninvasive Measurements; Numerical Methods; Heat Transfer; Performance); Transport Phenomena (Clean Energy; Mixing; Manufacturing and Materials Processing); Turbulent Flows — Issues and Perspectives; Algorithms and Applications for High Performance CFD Computation; Fluid Power; Fluid Dynamics of Wind Energy; Marine Hydrodynamics, V01BT14A001, July 10–14, 2016
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2016-7579
https://doi.org/10.1115/FEDSM2016-7579
View Paper titled, Experimental Investigation of the Laminar Boundary Layer Flow on a Rotating Wavy Disk
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Topics: Boundary layers, Disks, Flow (Dynamics), Laminar flow, Navier-Stokes equations, Rotating disks, Shapes
Proceedings Papers

Effect of Prandtl Number on Convective Heat Transfer in the Separated and Reattached Flow Region on a Blunt Flat Plate

Christian Helcig, Stefan aus der Wiesche
Proc. ASME. FEDSM2016, Volume 1B, Symposia: Fluid Mechanics (Fundamental Issues and Perspectives; Industrial and Environmental Applications); Multiphase Flow and Systems (Multiscale Methods; Noninvasive Measurements; Numerical Methods; Heat Transfer; Performance); Transport Phenomena (Clean Energy; Mixing; Manufacturing and Materials Processing); Turbulent Flows — Issues and Perspectives; Algorithms and Applications for High Performance CFD Computation; Fluid Power; Fluid Dynamics of Wind Energy; Marine Hydrodynamics, V01BT22A001, July 10–14, 2016
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2016-7580
https://doi.org/10.1115/FEDSM2016-7580
View Paper titled, Effect of Prandtl Number on Convective Heat Transfer in the Separated and Reattached Flow Region on a Blunt Flat Plate
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Topics: Convection, Flat plates, Flow (Dynamics), Prandtl number, Heat transfer, Circuits, Engineering systems and industry applications, Fluids, Water tunnels
Proceedings Papers

Effect of Prandtl Number on the Heat Transfer From a Rotating Disk: An Experimental Study

Christian Helcig, Stefan aus der Wiesche
Proc. ASME. HT2016, Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Theory and Fundamentals in Heat Transfer; Nanoscale Thermal Transport; Heat Transfer in Equipment; Heat Transfer in Fire and Combustion; Transport Processes in Fuel Cells and Heat Pipes; Boiling and Condensation in Macro, Micro and Nanosystems, V001T01A011, July 10–14, 2016
Publisher: American Society of Mechanical Engineers
Paper No: HT2016-7062
https://doi.org/10.1115/HT2016-7062
View Paper titled, Effect of Prandtl Number on the Heat Transfer From a Rotating Disk: An Experimental Study
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Topics: Heat transfer, Prandtl number, Rotating disks, Water, Fluids, Boundary layer turbulence, Convection, Disks, Flow (Dynamics), Heat transfer coefficients
Proceedings Papers

Aerodynamic Investigation of a Passive Secondary Jet Exciting a Separation Bubble for a Blunt Flat Plate

Christian Helcig, Stefan aus der Wiesche, Stephan Uhkoetter
Proc. ASME. AJKFluids2015, Volume 1: Symposia, V001T15A003, July 26–31, 2015
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2015-15065
https://doi.org/10.1115/AJKFluids2015-15065
View Paper titled, Aerodynamic Investigation of a Passive Secondary Jet Exciting a Separation Bubble for a Blunt Flat Plate
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Topics: Bubbles, Flat plates, Separation (Technology), Boundary layers, Flow (Dynamics), Jets, Large eddy simulation, Lasers, Numerical analysis, Wind tunnels
Proceedings Papers

Flow Over a Blunt Disk With Incidence: Location of Stagnation Point and Flow Separation

Christian Helcig, Stephan Uhkoetter, Stefan aus der Wiesche
Proc. ASME. FEDSM2014, Volume 1C, Symposia: Fundamental Issues and Perspectives in Fluid Mechanics; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Gas-Solid Flows: Dedicated to the Memory of Professor Clayton T. Crowe; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes, V01CT15A004, August 3–7, 2014
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2014-21181
https://doi.org/10.1115/FEDSM2014-21181
View Paper titled, Flow Over a Blunt Disk With Incidence: Location of Stagnation Point and Flow Separation
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Topics: Disks, Flow (Dynamics), Flow separation, Bubbles, Separation (Technology), Turbulence, Convection, Laser Doppler anemometry, Stagnation flow, Velocity measurement
Proceedings Papers

Convective Heat Transfer From a Free Rotating Disk Subjected to a Forced Crossflow

Christian Helcig, Stefan aus der Wiesche
Proc. ASME. GT2014, Volume 5B: Heat Transfer, V05BT14A012, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26223
https://doi.org/10.1115/GT2014-26223
View Paper titled, Convective Heat Transfer From a Free Rotating Disk Subjected to a Forced Crossflow
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Topics: Convection, Rotating disks, Flow (Dynamics), Disks, Heat transfer, Reynolds number, Machine design, Resolution (Optics), Turbochargers
Proceedings Papers

The Effect of the Incidence Angle on the Flow Over a Rotating Disk Subjected to Forced Air Streams

Christian Helcig, Stefan aus der Wiesche
Proc. ASME. FEDSM2013, Volume 1B, Symposia: Fluid Machinery; Fluid Power; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Fundamental Issues and Perspectives in Fluid Mechanics, V01BT16A007, July 7–11, 2013
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2013-16360
https://doi.org/10.1115/FEDSM2013-16360
View Paper titled, The Effect of the Incidence Angle on the Flow Over a Rotating Disk Subjected to Forced Air Streams
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Topics: Flow (Dynamics), Rotating disks, Reynolds number, Convection, Disks, Heat transfer, Resolution (Optics), Wind tunnels