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Cosmin E. Dumitrescu
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Journal Articles

Effect of Blending Ammonia With Natural Gas Hydrocarbons on the Performance of a Heavy-Duty Spark Ignition Engine

Luis F. Alvarez, Omid Askari, Cosmin E. Dumitrescu
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2025, 147(9): 091005.
Paper No: GTP-24-1797
https://doi.org/10.1115/1.4067405
Published Online: January 20, 2025
View Article titled, Effect of Blending Ammonia With Natural Gas Hydrocarbons on the Performance of a Heavy-Duty Spark Ignition Engine
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Topics: Combustion, Cycles, Cylinders, Engines, Flames, Fuels, Hydrocarbons, Ignition, Methane, Natural gas
Proceedings Papers

Effect of Blending Ammonia With Natural Gas Hydrocarbons on the Performance of a Heavy-Duty Spark Ignition Engine

Luis F. Alvarez, Omid Askari, Cosmin E. Dumitrescu
Proc. ASME. ICEF2024, ASME 2024 ICE Forward Conference, V001T02A006, October 20–23, 2024
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2024-140567
https://doi.org/10.1115/ICEF2024-140567
View Paper titled, Effect of Blending Ammonia With Natural Gas Hydrocarbons on the Performance of a Heavy-Duty Spark Ignition Engine
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Topics: Hydrocarbons, Natural gas, Spark-ignition engine, Fuels, Cycles, Engines, Combustion, Cylinders, Flames, Ignition
Proceedings Papers

Effect of Gas Composition on the Oxidation of Gas Component Emissions of a Dual-Fuel Diesel-Natural Gas Engine at Low Load Conditions

Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. ICEF2023, ASME 2023 ICE Forward Conference, V001T01A003, October 8–11, 2023
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2023-109624
https://doi.org/10.1115/ICEF2023-109624
View Paper titled, Effect of Gas Composition on the Oxidation of Gas Component Emissions of a Dual-Fuel Diesel-Natural Gas Engine at Low Load Conditions
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Topics: Diesel, Emissions, Engines, Fuels, Oxidation, Stress, Methane, Combustion, Exhaust systems, Pressure
Proceedings Papers

Numerical Investigation of a Heavy Duty Compression Ignition Engine Converted to Ammonia Spark Ignition Operation

Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. ICEF2022, ASME 2022 ICE Forward Conference, V001T02A001, October 16–19, 2022
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2022-88071
https://doi.org/10.1115/ICEF2022-88071
View Paper titled, Numerical Investigation of a Heavy Duty Compression Ignition Engine Converted to Ammonia Spark Ignition Operation
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Topics: Diesel engines, Ignition, Combustion, Fuels, Emissions, Energy generation, Engines, Flames, Nitrogen oxides, Hydrogen
Journal Articles

Comparison of Random Forest and Neural Network in Modeling the Performance and Emissions of a Natural Gas Spark Ignition Engine

Jinlong Liu, Qiao Huang, Christopher Ulishney, Cosmin E. Dumitrescu
Journal: Journal of Energy Resources Technology
Publisher: ASME
Article Type: Research Papers
J. Energy Resour. Technol. March 2022, 144(3): 032310.
Paper No: JERT-21-1797
https://doi.org/10.1115/1.4053301
Published Online: January 7, 2022
View Article titled, Comparison of Random Forest and Neural Network in Modeling the Performance and Emissions of a Natural Gas Spark Ignition Engine
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Topics: Artificial neural networks, Emissions, Engines, Errors, Machine learning, Natural gas, Algorithms, Combustion, Modeling, Cylinders
Proceedings Papers

Optical and Numerical Investigations of Flame Propagation in a Heavy Duty Spark Ignited Natural Gas Engine

Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. ICEF2021, ASME 2021 Internal Combustion Engine Division Fall Technical Conference, V001T01A003, October 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2021-67489
https://doi.org/10.1115/ICEF2021-67489
View Paper titled, Optical and Numerical Investigations of Flame Propagation in a Heavy Duty Spark Ignited Natural Gas Engine
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Topics: Flames, Gas engines, Combustion, Engines, Emissions, Methane, Fuels, Ignition, Natural gas, Pistons
Proceedings Papers

Predicting the Combustion Phasing of a Natural Gas Spark Ignition Engine Using the K-Nearest Neighbors Algorithm

Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. IMECE2020, Volume 8: Energy, V008T08A012, November 16–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2020-23982
https://doi.org/10.1115/IMECE2020-23982
View Paper titled, Predicting the Combustion Phasing of a Natural Gas Spark Ignition Engine Using the K-Nearest Neighbors Algorithm
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Topics: Algorithms, Combustion, Natural gas, Spark-ignition engine, Engines, Errors, Pressure, Cylinders, Fuels, Ignition
Proceedings Papers

Prediction of Efficient Operating Conditions Inside a Heavy-Duty Natural Gas Spark Ignition Engine Using Artificial Neural Networks

Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. IMECE2020, Volume 8: Energy, V008T08A013, November 16–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2020-23987
https://doi.org/10.1115/IMECE2020-23987
View Paper titled, Prediction of Efficient Operating Conditions Inside a Heavy-Duty Natural Gas Spark Ignition Engine Using Artificial Neural Networks
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Topics: Artificial neural networks, Natural gas, Spark-ignition engine, Engines, Pressure, Cylinders, Combustion, Design, Optimization, Safety
Proceedings Papers

Lessons From the Conversion of a Heavy-Duty Compression Ignition Engine to Natural Gas Spark Ignition Operation

Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. IMECE2020, Volume 8: Energy, V008T08A014, November 16–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2020-23991
https://doi.org/10.1115/IMECE2020-23991
View Paper titled, Lessons From the Conversion of a Heavy-Duty Compression Ignition Engine to Natural Gas Spark Ignition Operation
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Topics: Diesel engines, Ignition, Natural gas, Engines, Combustion, Emissions, Fuels, Carbon monoxide, Compression, Diesel
Proceedings Papers

Application of Random Forest Machine Learning Models to Forecast Combustion Profile Parameters of a Natural Gas Spark Ignition Engine

Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. IMECE2020, Volume 6: Design, Systems, and Complexity, V006T06A003, November 16–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2020-23973
https://doi.org/10.1115/IMECE2020-23973
View Paper titled, Application of Random Forest Machine Learning Models to Forecast Combustion Profile Parameters of a Natural Gas Spark Ignition Engine
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Topics: Combustion, Machine learning, Natural gas, Spark-ignition engine, Engines, Algorithms, Cylinders, Dynamometers, Engineering simulation, Errors
Proceedings Papers

Engine Performance and Emissions for a Heavy-Duty Diesel Engine Converted to Stoichiometric Natural Gas Operation

Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. ICEF2020, ASME 2020 Internal Combustion Engine Division Fall Technical Conference, V001T03A008, November 4–6, 2020
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2020-2964
https://doi.org/10.1115/ICEF2020-2964
View Paper titled, Engine Performance and Emissions for a Heavy-Duty Diesel Engine Converted to Stoichiometric Natural Gas Operation
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Topics: Diesel engines, Emissions, Engines, Natural gas, Combustion, Ignition, Diesel, Air pollution control, Carbon monoxide, Catalytic converters
Proceedings Papers

Improving Machine Learning Model Performance in Predicting the Indicated Mean Effective Pressure of a Natural Gas Engine

Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu
Proc. ASME. ICEF2020, ASME 2020 Internal Combustion Engine Division Fall Technical Conference, V001T03A009, November 4–6, 2020
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2020-2968
https://doi.org/10.1115/ICEF2020-2968
View Paper titled, Improving Machine Learning Model Performance in Predicting the Indicated Mean Effective Pressure of a Natural Gas Engine
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Topics: Gas engines, Machine learning, Pressure, Engines, Algorithms, Boundary-value problems, Combustion, Cylinders, Diesel, Diesel engines
Journal Articles

Investigation of Multistage Combustion Inside a Heavy-Duty Natural-Gas Spark-Ignition Engine Using Three-Dimensional Computational Fluid Dynamics Simulations and the Wiebe-Function Combustion Model

Jinlong Liu, Cosmin E. Dumitrescu
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2020, 142(10): 101012.
Paper No: GTP-19-1646
https://doi.org/10.1115/1.4045869
Published Online: September 29, 2020
View Article titled, Investigation of Multistage Combustion Inside a Heavy-Duty Natural-Gas Spark-Ignition Engine Using Three-Dimensional Computational Fluid Dynamics Simulations and the Wiebe-Function Combustion Model
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Topics: Combustion, Computational fluid dynamics, Simulation, Heat, Natural gas, Engines, Flames, Cylinders, Spark-ignition engine, Fuels
Proceedings Papers

Development of the Control and Acquisition System for a Natural-Gas Spark-Ignition Engine Test Bench

Lorenzo Gasbarro, Jinlong Liu, Christopher Ulishney, Cosmin E. Dumitrescu, Luca Ambrogi, Michele Battistoni
Proc. ASME. IMECE2019, Volume 6: Energy, V006T06A074, November 11–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2019-11485
https://doi.org/10.1115/IMECE2019-11485
View Paper titled, Development of the Control and Acquisition System for a Natural-Gas Spark-Ignition Engine Test Bench
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Topics: Natural gas, Spark-ignition engine, Engines, Computational fluid dynamics, Control equipment, Data acquisition systems, Design, Dynamometers, Emissions, Internal combustion engines
Proceedings Papers

Conversion of a Heavy-Duty Diesel Engine to Natural-Gas Spark-Ignition Operation: Test Bench Development

Jinlong Liu, Cosmin E. Dumitrescu, Hemanth Bommisetty, Christopher Ulishney
Proc. ASME. IMECE2019, Volume 6: Energy, V006T06A013, November 11–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2019-10728
https://doi.org/10.1115/IMECE2019-10728
View Paper titled, Conversion of a Heavy-Duty Diesel Engine to Natural-Gas Spark-Ignition Operation: Test Bench Development
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Topics: Diesel engines, Ignition, Natural gas, Engines, Pressure, Compression, Cylinders, Emissions, Data acquisition systems, Design
Proceedings Papers

Experimental Setup of Combustion Visualization Inside a Heavy-Duty Diesel Engine Converted to Natural-Gas Spark-Ignition Operation

Vishnu Padmanaban, Jinlong Liu, Cosmin E. Dumitrescu
Proc. ASME. IMECE2019, Volume 6: Energy, V006T06A014, November 11–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2019-10735
https://doi.org/10.1115/IMECE2019-10735
View Paper titled, Experimental Setup of Combustion Visualization Inside a Heavy-Duty Diesel Engine Converted to Natural-Gas Spark-Ignition Operation
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Topics: Combustion, Diesel engines, Ignition, Natural gas, Visualization, Flames, Cylinders, Diesel, Engines, Fuels
Proceedings Papers

An Experimental Study of the Combustion Process in a Natural-Gas Spark-Ignition Engine

Jinlong Liu, Cosmin E. Dumitrescu, Hemanth Bommisetty
Proc. ASME. IMECE2019, Volume 6: Energy, V006T06A025, November 11–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2019-11637
https://doi.org/10.1115/IMECE2019-11637
View Paper titled, An Experimental Study of the Combustion Process in a Natural-Gas Spark-Ignition Engine
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Topics: Combustion, Natural gas, Spark-ignition engine, Engines, Ignition, Fuels, Pistons, Compression, Diesel, Diesel engines
Proceedings Papers

Observation of Flame Propagation in a Heavy-Duty Natural-Gas Lean Burn Spark-Ignition Engine

Jinlong Liu, Cosmin E. Dumitrescu
Proc. ASME. ICEF2019, ASME 2019 Internal Combustion Engine Division Fall Technical Conference, V001T03A007, October 20–23, 2019
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2019-7184
https://doi.org/10.1115/ICEF2019-7184
View Paper titled, Observation of Flame Propagation in a Heavy-Duty Natural-Gas Lean Burn Spark-Ignition Engine
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Topics: Flames, Natural gas, Spark-ignition engine, Engines, Combustion, Turbulence, Diesel engines, Carbon, Combustion chambers, Compression
Proceedings Papers

Two-Stage Lean-Burn Combustion Inside a Natural-Gas Spark-Ignition Engine With a Bowl-in-Piston Chamber

Jinlong Liu, Cosmin E. Dumitrescu
Proc. ASME. ICEF2019, ASME 2019 Internal Combustion Engine Division Fall Technical Conference, V001T02A008, October 20–23, 2019
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2019-7181
https://doi.org/10.1115/ICEF2019-7181
View Paper titled, Two-Stage Lean-Burn Combustion Inside a Natural-Gas Spark-Ignition Engine With a Bowl-in-Piston Chamber
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Topics: Combustion, Natural gas, Pistons, Spark-ignition engine, Combustion chambers, Emissions, Carbon, Diesel, Diesel engines, Ejectors
Proceedings Papers

Twin-Peak Heat Release Phenomenon Inside a Heavy-Duty Diesel Engine Retrofitted to Natural-Gas Spark Ignition

Jinlong Liu, Cosmin E. Dumitrescu, Christopher Ulishney
Proc. ASME. ICEF2019, ASME 2019 Internal Combustion Engine Division Fall Technical Conference, V001T02A009, October 20–23, 2019
Publisher: American Society of Mechanical Engineers
Paper No: ICEF2019-7182
https://doi.org/10.1115/ICEF2019-7182
View Paper titled, Twin-Peak Heat Release Phenomenon Inside a Heavy-Duty Diesel Engine Retrofitted to Natural-Gas Spark Ignition
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Topics: Diesel engines, Heat, Ignition, Natural gas, Combustion, Cycles, Flames, Compression, Computational fluid dynamics, Diesel