Turbulent entrainment model for spark-ignition engine combustion
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 tau was calculated using the characteristic reaction time tau/sub c/ for the microscale, lambda/S/sub l/, where S/sub l/ is the laminar flame speed and propagation of ignition sites within a coherent turbulent structure. Tau 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.
- OSTI ID:
- 6553274
- Report Number(s):
- CONF-7706146-5
- Resource Relation:
- Conference: Fuels and lubricants meeting, Tulsa, OK, USA, 7 Jun 1977; Related Information: SAE Paper 770647
- Country of Publication:
- United States
- Language:
- English
Similar Records
EGR Dilution and Fuel Property Effects on High-Efficiency Spark-Ignition Flames
NUMERICAL INVESTIGATION OF FUEL PROPERTY EFFECTS ON MIXED-MODE COMBUSTION IN A SPARK-IGNITION ENGINE
Related Subjects
SPARK IGNITION ENGINES
FLAME PROPAGATION
THERMODYNAMIC MODEL
ENTRAINMENT
EXHAUST GASES
REACTION KINETICS
THERMODYNAMIC PROPERTIES
TURBULENCE
ENGINES
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
KINETICS
MATHEMATICAL MODELS
PARTICLE MODELS
PHYSICAL PROPERTIES
STATISTICAL MODELS
WASTES
330101* - Internal Combustion Engines- Spark-Ignition