Turbulent entrainment model for spark-ignition engine combustion
Conference
·
OSTI ID:6553274
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
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
ENGINES
ENTRAINMENT
EXHAUST GASES
FLAME PROPAGATION
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
KINETICS
MATHEMATICAL MODELS
PARTICLE MODELS
PHYSICAL PROPERTIES
REACTION KINETICS
SPARK IGNITION ENGINES
STATISTICAL MODELS
THERMODYNAMIC MODEL
THERMODYNAMIC PROPERTIES
TURBULENCE
WASTES
330101* -- Internal Combustion Engines-- Spark-Ignition
ENGINES
ENTRAINMENT
EXHAUST GASES
FLAME PROPAGATION
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
KINETICS
MATHEMATICAL MODELS
PARTICLE MODELS
PHYSICAL PROPERTIES
REACTION KINETICS
SPARK IGNITION ENGINES
STATISTICAL MODELS
THERMODYNAMIC MODEL
THERMODYNAMIC PROPERTIES
TURBULENCE
WASTES