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Application of a Comprehensive Lagrangian–Eulerian Spark-Ignition Model to Different Operating Conditions

Journal Article · · SAE International Journal of Engines
 [1];  [1];  [2]
  1. Argonne National Laboratory (ANL), Argonne, IL (United States)
  2. FCA US LLC, Auburn Hills, MI (United States)
+ Show Author Affiliations

Increasing engine efficiency is essential to reducing emissions, which is a priority for automakers. Unconventional modes such as boosted and highly dilute operation have the potential to increase engine efficiency but suffer from stability concerns and cyclic variability. To aid engineers in designing ignition systems that reduce cyclic variability in such engine operation modes, reliable and accurate spark-ignition models are necessary. Here, in this article, a Lagrangian–Eulerian spark-ignition (LESI) model is used to simulate electrical discharge, spark channel elongation, and ignition in inert or reacting crossflow within a combustion vessel, at different pressures, flow speeds, and dilution rates. First the model formulation is briefly revisited. Then, the experimental and simulations setups are presented. The results showcase the model’s ability to predict the secondary circuit voltage, current, and power signals, in addition to the spark channel elongation, for the inert cases, or flame front growth, for the reacting cases. The results also compare simulation spark channel and flame growth plots to experimental Schlieren images at different instants in time. This work serves to highlight LESI’s ability to predict the characteristics of discharge and ignition across a variety of operating conditions.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2530141
Journal Information:
SAE International Journal of Engines, Journal Name: SAE International Journal of Engines Journal Issue: 5 Vol. 17; ISSN 1946-3936
Publisher:
SAE InternationalCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

42 ENGINEERING
combustion
combustion processes
engine efficiency
engines
ignition systems
spark ignition engines