A Turbulent Entrainment Model for Spark-Ignition Engine Combustion

770647

02/01/1977

Event
1977 SAE International Fall Fuels and Lubricants Meeting and Exhibition
Authors Abstract
Content
A turbulent entrainment model for the turbulent combustion process in spark-ignition engines is described. The model uses the basic quantities of turbulent flow; i.e. the integral length scale, micro length scale, and turbulent intensity. The characteristic reaction time for a large eddy τ is calculated using the characteristic reaction time τc for the microscale, λ/S ℓ, where S ℓ is the laminar flame speed and propagation of ignition sites within a coherent turbulent structure. τ is related to the flame kernel development time and shows similar trends to the ignition delay time. The combustion model is demonstrated by calculations showing the typical trend behavior of combustion duration with equivalence ratio, exhaust gas recirculation, spark timing and engine speed.
Meta TagsDetails
DOI
https://doi.org/10.4271/770647
Pages
20
Citation
Tabaczynski, R., Ferguson, C., and Radhakrishnan, K., "A Turbulent Entrainment Model for Spark-Ignition Engine Combustion," SAE Technical Paper 770647, 1977, https://doi.org/10.4271/770647.
Additional Details
Publisher
Published
Feb 1, 1977
Product Code
770647
Content Type
Technical Paper
Language
English