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Marina Braun-Unkhoff
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Journal Articles

An Upgraded Chemical Kinetic Mechanism for Iso -Octane Oxidation: Prediction of Polyaromatics Formation in Laminar Counterflow Diffusion Flames

Astrid Ramirez Hernandez, Trupti Kathrotia, Torsten Methling, Marina Braun-Unkhoff, Uwe Riedel
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2023, 145(6): 061006.
Paper No: GTP-22-1474
https://doi.org/10.1115/1.4056096
Published Online: January 13, 2023
View Article titled, An Upgraded Chemical Kinetic Mechanism for Iso -Octane Oxidation: Prediction of Polyaromatics Formation in Laminar Counterflow Diffusion Flames
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Topics: Flames, Ignition delay, Modeling, Oxidation, Fuels, Combustion, Soot
Journal Articles

A Study on Fundamental Combustion Properties of Trimethyl Orthoformate: Experiments and Modeling

John Mbũrũ Ngũgĩ, Sandra Richter, Marina Braun-Unkhoff, Clemens Naumann, Uwe Riedel
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2023, 145(2): 021011.
Paper No: GTP-22-1344
https://doi.org/10.1115/1.4055828
Published Online: November 28, 2022
View Article titled, A Study on Fundamental Combustion Properties of Trimethyl Orthoformate: Experiments and Modeling
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Topics: Combustion, Fuels, Ignition delay, Flames, Modeling, Temperature
Proceedings Papers

A Study on Fundamental Combustion Properties of Trimethyl Orthoformate: Experiments and Modeling

John Mbũrũ Ngũgĩ, Sandra Richter, Marina Braun-Unkhoff, Clemens Naumann, Uwe Riedel
Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T03A016, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83029
https://doi.org/10.1115/GT2022-83029
View Paper titled, A Study on Fundamental Combustion Properties of Trimethyl Orthoformate: Experiments and Modeling
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Topics: Biofuel, Combustion, Ethers (Class of compounds), Flames, Fuels, Ignition delay, Modeling, Soot, Carbon, High temperature
Proceedings Papers

An Upgraded Chemical Kinetic Mechanism for ISO-Octane Oxidation: Prediction of Polyaromatics Formation in Laminar Counterflow Diffusion Flames

Astrid Ramirez Hernandez, Trupti Kathrotia, Torsten Methling, Marina Braun-Unkhoff, Uwe Riedel
Proc. ASME. GT2022, Volume 2: Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine, V002T03A017, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83053
https://doi.org/10.1115/GT2022-83053
View Paper titled, An Upgraded Chemical Kinetic Mechanism for ISO-Octane Oxidation: Prediction of Polyaromatics Formation in Laminar Counterflow Diffusion Flames
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Topics: Diffusion flames, Flames, Oxidation, Ignition delay, Soot, Combustion, Gasoline, Ignition, Jet engines, Jet fuels
Journal Articles

Reaction Model Development of Selected Aromatics as Relevant Molecules of a Kerosene Surrogate—The Importance of m -Xylene Within the Combustion of 1,3,5-Trimethylbenzene

Astrid Ramirez Hernandez, Trupti Kathrotia, Torsten Methling, Marina Braun-Unkhoff, Uwe Riedel
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2022, 144(2): 021002.
Paper No: GTP-21-1384
https://doi.org/10.1115/1.4052206
Published Online: October 20, 2021
View Article titled, Reaction Model Development of Selected Aromatics as Relevant Molecules of a Kerosene Surrogate—The Importance of m -Xylene Within the Combustion of 1,3,5-Trimethylbenzene
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Topics: Combustion, Ignition delay, Temperature, Fuels, Flames, Modeling, Oxidation, Pressure
Journal Articles

A Study on Fundamental Combustion Properties of Oxymethylene Ether-2

John M. Ngugi, Sandra Richter, Marina Braun-Unkhoff, Clemens Naumann, Markus Köhler, Uwe Riedel
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2022, 144(1): 011014.
Paper No: GTP-21-1313
https://doi.org/10.1115/1.4052097
Published Online: October 18, 2021
View Article titled, A Study on Fundamental Combustion Properties of Oxymethylene Ether-2
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Topics: Combustion, Ethers (Class of compounds), Flames, Fuels, Ignition delay, Pressure, Temperature, Sensitivity analysis, Ignition, Modeling
Proceedings Papers

A Study on Fundamental Combustion Properties of Oxymethylene Ether-2

John N. Ngugi, Sandra Richter, Marina Braun-Unkhoff, Clemens Naumann, Markus Köhler, Uwe Riedel
Proc. ASME. GT2021, Volume 6: Ceramics and Ceramic Composites; Coal, Biomass, Hydrogen, and Alternative Fuels; Microturbines, Turbochargers, and Small Turbomachines, V006T03A014, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-60078
https://doi.org/10.1115/GT2021-60078
View Paper titled, A Study on Fundamental Combustion Properties of Oxymethylene Ether-2
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Topics: Combustion, Ethers (Class of compounds), Flames, Ignition delay, Synthetic fuels
Proceedings Papers

Reaction Model Development of Selected Aromatics as Relevant Molecules of a Kerosene Surrogate – The Importance of M-Xylene Within the Combustion of 1,3,5-Trimethylbenzene

Astrid Ramirez Hernandez, Trupti Kathrotia, Torsten Methling, Marina Braun-Unkhoff, Uwe Riedel
Proc. ASME. GT2021, Volume 6: Ceramics and Ceramic Composites; Coal, Biomass, Hydrogen, and Alternative Fuels; Microturbines, Turbochargers, and Small Turbomachines, V006T03A015, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-60093
https://doi.org/10.1115/GT2021-60093
View Paper titled, Reaction Model Development of Selected Aromatics as Relevant Molecules of a Kerosene Surrogate – The Importance of M-Xylene Within the Combustion of 1,3,5-Trimethylbenzene
Open the PDF for Reaction Model Development of Selected Aromatics as Relevant Molecules of a Kerosene Surrogate – The Importance of M-Xylene Within the Combustion of 1,3,5-Trimethylbenzene in another window
Topics: Combustion, Fuels, Model development
Proceedings Papers

An Investigation of Fundamental Combustion Properties of the Oxygenated Fuels DME and OME 1

John M. Ngugi, Sandra Richter, Marina Braun-Unkhoff, Clemens Naumann, Uwe Riedel
Proc. ASME. GT2020, Volume 3: Ceramics; Coal, Biomass, Hydrogen, and Alternative Fuels, V003T03A007, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14702
https://doi.org/10.1115/GT2020-14702
View Paper titled, An Investigation of Fundamental Combustion Properties of the Oxygenated Fuels DME and OME 1
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Topics: Combustion, Ethers (Class of compounds), Flames, Fuels, Ignition delay
Proceedings Papers

Ignition Behavior of Oxy-Methane With High Fuel Loading and CO 2 Dilution in a Shock Tube

Andrew R. Laich, Jessica Baker, Erik Ninnemann, Clayton Sigler, Clemens Naumann, Marina Braun-Unkhoff, Subith S. Vasu
Proc. ASME. GT2020, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A012, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14338
https://doi.org/10.1115/GT2020-14338
View Paper titled, Ignition Behavior of Oxy-Methane With High Fuel Loading and CO 2 Dilution in a Shock Tube
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Topics: Carbon dioxide, Explosions, Fuels, Ignition, Methane, Shock tubes
Journal Articles

Effects of High Fuel Loading and CO 2 Dilution on Oxy-Methane Ignition Inside a Shock Tube at High Pressure

Andrew R. Laich, Jessica Baker, Erik Ninnemann, Clayton Sigler, Clemens Naumann, Marina Braun-Unkhoff, Subith S. Vasu
Journal: Journal of Energy Resources Technology
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. October 2020, 142(10): 102103.
Paper No: JERT-20-1265
https://doi.org/10.1115/1.4047023
Published Online: May 26, 2020
View Article titled, Effects of High Fuel Loading and CO 2 Dilution on Oxy-Methane Ignition Inside a Shock Tube at High Pressure
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Topics: Carbon dioxide, Explosions, Fuels, Ignition, Methane, Pressure, Shock tubes, Ignition delay, Emissions, Waves
Proceedings Papers

An Investigation of Combustion Properties of a Gasoline Primary Reference Fuel Surrogate Blended With Butanol

Sandra Richter, Marina Braun-Unkhoff, Jürgen Herzler, Torsten Methling, Clemens Naumann, Uwe Riedel
Proc. ASME. GT2019, Volume 3: Coal, Biomass, Hydrogen, and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, V003T03A014, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-90911
https://doi.org/10.1115/GT2019-90911
View Paper titled, An Investigation of Combustion Properties of a Gasoline Primary Reference Fuel Surrogate Blended With Butanol
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Topics: Combustion, Fuels, Gasoline, Ignition delay
Proceedings Papers

Reaction Model Development for Synthetic Jet Fuels: Surrogate Fuels As a Flexible Tool to Predict Their Performance

Trupti Kathrotia, Sandra Richter, Clemens Naumann, Nadezhda Slavinskaya, Torsten Methling, Marina Braun-Unkhoff, Uwe Riedel
Proc. ASME. GT2018, Volume 3: Coal, Biomass, and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, V003T03A008, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-76997
https://doi.org/10.1115/GT2018-76997
View Paper titled, Reaction Model Development for Synthetic Jet Fuels: Surrogate Fuels As a Flexible Tool to Predict Their Performance
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Topics: Fuels, Jet fuels, Model development, Combustion, Aviation, Crude oil, Design, Emissions, Synthetic fuels, Chemical properties
Journal Articles

An Investigation of Combustion Properties of Butanol and Its Potential for Power Generation

Torsten Methling, Sandra Richter, Trupti Kathrotia, Marina Braun-Unkhoff, Clemens Naumann, Uwe Riedel
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2018, 140(9): 091505.
Paper No: GTP-18-1014
https://doi.org/10.1115/1.4039731
Published Online: June 15, 2018
View Article titled, An Investigation of Combustion Properties of Butanol and Its Potential for Power Generation
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Topics: Combustion, Fuels, Ignition delay, Modeling, Flames, Temperature
Proceedings Papers

An Investigation of Combustion Properties of Butanol and its Potential for Power Generation

Torsten Methling, Sandra Richter, Trupti Kathrotia, Marina Braun-Unkhoff, Clemens Naumann, Uwe Riedel
Proc. ASME. GT2017, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration Applications; Organic Rankine Cycle Power Systems, V003T03A008, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64551
https://doi.org/10.1115/GT2017-64551
View Paper titled, An Investigation of Combustion Properties of Butanol and its Potential for Power Generation
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Topics: Combustion, Energy generation, Ignition delay, Flames, Fuels, Atmospheric pressure, Climate change, Ethanol, Modeling, Petroleum
Journal Articles

A Study on the Emissions of Alternative Aviation Fuels

Sebastian Riebl, Marina Braun-Unkhoff, Uwe Riedel
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2017, 139(8): 081503.
Paper No: GTP-16-1519
https://doi.org/10.1115/1.4035816
Published Online: March 21, 2017
View Article titled, A Study on the Emissions of Alternative Aviation Fuels
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Topics: Emissions, Fuels, Nitrogen oxides
Proceedings Papers

A Study on the Emissions of Alternative Aviation Fuels

Sebastian Riebl, Marina Braun-Unkhoff, Uwe Riedel
Proc. ASME. GT2016, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, V003T03A006, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-57361
https://doi.org/10.1115/GT2016-57361
View Paper titled, A Study on the Emissions of Alternative Aviation Fuels
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Topics: Aviation, Emissions, Fuels, Nitrogen oxides, Jet fuels, Carbon dioxide, Combustion, Soot, Benzene, Carbon
Journal Articles

The Influence of Diluent Gases on Combustion Properties of Natural Gas: A Combined Experimental and Modeling Study

Sandra Richter, Jörn Ermel, Thomas Kick, Marina Braun-Unkhoff, Clemens Naumann, Uwe Riedel
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2016, 138(10): 101503.
Paper No: GTP-15-1572
https://doi.org/10.1115/1.4033160
Published Online: April 26, 2016
View Article titled, The Influence of Diluent Gases on Combustion Properties of Natural Gas: A Combined Experimental and Modeling Study
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Topics: Combustion, Flames, Fuels, Hydrogen, Methane, Modeling, Gases
Journal Articles

Alternative Fuels Based on Biomass: An Experimental and Modeling Study of Ethanol Cofiring to Natural Gas

Marina Braun-Unkhoff, Jens Dembowski, Jürgen Herzler, Jürgen Karle, Clemens Naumann, Uwe Riedel
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2015, 137(9): 091503.
Paper No: GTP-14-1640
https://doi.org/10.1115/1.4029625
Published Online: September 1, 2015
View Article titled, Alternative Fuels Based on Biomass: An Experimental and Modeling Study of Ethanol Cofiring to Natural Gas
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Topics: Combustion, Ethanol, Fuels, Ignition delay, Modeling, Temperature, Pressure, Flames
Proceedings Papers

The Influence of Diluent Gases on Combustion Properties of Natural Gas: A Combined Experimental and Modeling Study

Jörn Ermel, Sandra Richter, Thomas Kick, Marina Braun-Unkhoff, Clemens Naumann, Uwe Riedel
Proc. ASME. GT2015, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration, V003T03A006, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42752
https://doi.org/10.1115/GT2015-42752
View Paper titled, The Influence of Diluent Gases on Combustion Properties of Natural Gas: A Combined Experimental and Modeling Study
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Topics: Combustion, Diluents, Gases, Modeling, Natural gas, Fuels, Hydrogen, Flames, Nitrogen, Methane