Combustion Characteristics and Dynamics in Diesel Engine Systems
Summary
Diesel engine systems operate on compression-ignition principles in which fuel injection, mixing, ignition and flame propagation are governed by in-cylinder thermodynamics and fluid mechanics. Combustion efficiency hinges on precise control of spray characteristics such as penetration, droplet size and distribution, which in turn influence ignition delay, flame lift-off length and soot formation. Dynamic phenomena including cycle-to-cycle variation and transient injection strategies modulate pressure and heat-release rate profiles, affecting both performance and emissions. Advances in high-resolution diagnostics and multi-scale simulations have revealed the interplay between injector design, fuel properties and in-cylinder flow structures. Modern research emphasises optimisation of fuel–air mixing via nozzle geometry, dwell periods and alternative fuels to lower particulate and nitrogen oxide emissions while maintaining thermal efficiency. Global efforts span fundamental studies of spray atomisation to system-level analysis of fuel blends, highlighting the role of combustion characteristics in sustainable diesel technologies.
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Combustion Characteristics and Dynamics in Diesel Engine Systems publication trend
The graph below shows the total number of articles in combustion characteristics and dynamics in diesel engine systems across all publications each year (not limited to Nature Index journals).
Technical terms
Ignition delay: The interval between the start of fuel injection and the onset of combustion.
Spray penetration: The axial distance travelled by the fuel spray from the injector tip before evaporation.
Lift-off length: The gap between the injector and the location where the flame stabilises.
Cycle-to-cycle variation: The fluctuation in combustion metrics such as in-cylinder pressure and heat-release rate between successive engine cycles.
Large eddy simulation (LES): A computational technique resolving large turbulent structures while modelling smaller scales to predict combustion dynamics and pollutant formation.
References
- Large eddy simulation of soot formation in a ducted fuel injection configuration. Fuel (2022).
- Study of Visualization Experiment on the Influence of Injector Nozzle Diameter on Diesel Engine Spray Ignition and Combustion Characteristics. Energies (2020).
- Cycle-to-Cycle Variation of a Diesel Engine Fueled with Fischer–Tropsch Fuel Synthesized from Coal. Applied Sciences (2019).
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