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RISComputational Fluid Dynamics Modeling of Low Temperature Ignition Processes From a Nanosecond Pulsed Discharge at Quiescent Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Recent interest in nonequilibrium plasma discharges as sources of ignition for the automotive industry has not yet been accompanied by the availability of dedicated models to perform this task in computational fluid dynamics ...
Multidimensional Modeling of Mixture Formation in a Hydrogen-Fueled Heavy-Duty Optical Engine With Direct Injection
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Hydrogen (H2), as a carbon-free fuel, is considered as one of the most promising solutions to reduce the carbon footprint of hard-to-decarbonize energy and transportation sectors. As such, hydrogen-fueled internal combustion ...
Assessment of Turbulent Combustion Models for Simulating Prechamber Ignition in a Natural Gas Engine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Lean combustion is a promising strategy to increase thermal efficiency in an internal combustion engine, by exploiting a favorable specific heat ratio of the fresh mixture while simultaneously suppressing the heat losses ...
Evaluation of Spray and Combustion Models for Simulating Dilute Combustion in a Direct-Injection Spark-Ignition Engine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Dilute combustion in spark-ignition engines has the potential to improve thermal efficiency by mitigating knock and by reducing throttling and wall heat losses. However, ignition and combustion processes can become unstable ...
Simulations of Multi-Mode Combustion Regimes Realizable in a Gasoline Direct Injection Engine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Lean and dilute gasoline compression ignition (GCI) operation in spark ignition (SI) engines are an attractive strategy to attain high fuel efficiency and low NOx levels. However, this combustion mode is often limited to ...
Extending Lean and Exhaust Gas Recirculation Dilute Operating Limits of a Modern Gasoline Direct Injection Engine Using a Low Energy Transient Plasma Ignition System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The efficiency improvement and emissions reduction potential of lean and exhaust gas recirculation (EGR)dilute operation of sparkignition gasoline engines is well understood and documented. However, dilute operation is ...
Capturing Cyclic Variability in Exhaust Gas Recirculation Dilute Spark Ignition Combustion Using Multicycle RANS
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Dilute combustion is an effective approach to increase the thermal efficiency of sparkignition (SI) internal combustion engines (ICEs). However, high dilution levels typically result in large cycletocycle variations (CCV) ...
Influence of Charge Motion and Compression Ratio on the Performance of a Combustion Concept Employing In-Cylinder Gasoline and Natural Gas Blending
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present paper represents a small piece of an extensive experimental effort investigating the dual-fuel operation of a light-duty spark ignited engine. Natural gas (NG) was directly injected into the cylinder and gasoline ...
High-Fidelity Energy Deposition Ignition Model Coupled With Flame Propagation Models at Engine-Like Flow Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: With the heightened pressure on car manufacturers to increase the efficiency and reduce the carbon emissions of their fleets, more challenging engine operation has become a viable option. Highly dilute, boosted, and ...
Development of a Hybrid Lagrangian–Eulerian Model to Describe Spark-Ignition Processes at Engine-Like Turbulent Flow Conditions
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: With the engine technology moving toward more challenging (highly dilute and boosted) operation, spark-ignition processes play a key role in determining flame propagation and completeness of the combustion process. On the ...