Early flame development and burning rates in spark ignition engines and their cyclic variability
Experiments by others have been analyzed to obtain both qualitative and quantitative information on early flame development and burning rates in a square piston premixed spark-ignition engine. Flame growth was observed using high speed Schlieren photography and simultaneous pressure records were obtained using piezo-electric transducers. To study the effects of in-cylinder gas motion several combinations of shrouded and unshrouded inlet valves, and flat and stepped pistons were used. Spark position was also varied. The analysis supports the wrinkled laminar flame model of turbulent flame structure in spark-ignition engines. It also suggests that cycle-by-cycle variations in the growth rate and location of the flame kernel at very early times are the major cause of cycle-by-cycle pressure variations in spark-ignition engines.
- OSTI ID:
- 6327145
- Report Number(s):
- CONF-870204-
- Country of Publication:
- United States
- Language:
- English
Similar Records
Predicting Cycle-to-cycle Variations in a Spark-ignition Engine using Multi-cycle Large Eddy Simulation
Predicting Cycle-to-cycle Variations in a Spark-ignition Engine using Multi-cycle Large Eddy Simulation
Related Subjects
330101* -- Internal Combustion Engines-- Spark-Ignition
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CONTROL
COMBUSTION PROPERTIES
CONTROL
CONTROL EQUIPMENT
ELECTRIC DISCHARGES
ELECTRIC SPARKS
ELECTRICITY
ENGINES
EQUIPMENT
FLAME PROPAGATION
FLAMES
FLOW REGULATORS
FLUID FLOW
FUEL SYSTEMS
GAS FLOW
HEAT ENGINES
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
LAMINAR FLOW
OPERATION
OXIDATION
PIEZOELECTRICITY
PISTONS
PRESSURE EFFECTS
PRESSURE GRADIENTS
PRESSURE MEASUREMENT
SPARK IGNITION ENGINES
THERMOCHEMICAL PROCESSES
TRANSDUCERS
TURBULENT FLOW
VALVES
VARIATIONS