Large-eddy simulations of a spark ignition ic engine

Samuel J. Kazmouz, Daniel C. Haworth

Research output: Contribution to conferencePaperpeer-review


Cycle-To-cycle variations of flow and combustion in internal combustion engines limit their fuel efficiency and emissions potential. Large-eddy simulation is an effective method to simulate fired engine operation, including accounting for cycle-To-cycle variations. In this research, large-eddy simulations of in-cylinder processes in a single-cylinder optically accessible spark-ignition piston engine are performed. The engine grid is created using ES-ICE, and is refined in the spark-plug vicinity, to better capture early flame development. STAR-CD is utilized to carry out the simulations, using a modified thickened flame model for turbulent premixed flame propagation and a Smagorinsky model for sub-grid-scale turbulence. Multiple engine cycles are simulated successively for steady-state motored and firing engine operation. Here the fired results are for homogeneous stoichiometric premixed reactants. The eventual goal is to develop a predictive tool for CFD simulations of direct-injection stratified-charge spark-ignition engines, which can be used to investigate cycle-To-cycle variations in flow and combustion.

Original languageEnglish (US)
StatePublished - 2018
Event2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018 - State College, United States
Duration: Mar 4 2018Mar 7 2018


Other2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018
Country/TerritoryUnited States
CityState College

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • General Chemical Engineering


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