Flame imaging studies in a spark-ignition four-stroke internal combustion optical engine

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5493624

Bates, S C

In this paper the behavior of combustion in a realistic SI Four-Stroke engine with a transparent liner and piston top is studied using stereo gated image-intensified NTSC video cameras to record instantaneous flame position. Flame development is measured by double exposing each frame at different crank angles in a single cycle. The images are digitized and analysed with a PC-based image processing system. A complete cylinder pressure history of the propane fuelled combustion is combined with the flame images to study each cycle at different equivalence ratios, concentrating on lean combustion. Cycle-by-cycle variation is explored at 500 rpm, and a generic lean-limit combustion oscillation caused by changing residual gas is described and explained. The effect of engine swirl on the flame is shown.

• OSTI ID: 5493624
• Report Number(s): CONF-890240--
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
ENGINES
FLAME PROPAGATION
HEAT ENGINES
IMAGE PROCESSING
IMAGES
INTERNAL COMBUSTION ENGINES
KINETICS
MEASURING INSTRUMENTS
MONITORING
MONITORS
PROCESSING
REACTION KINETICS
SPARK IGNITION ENGINES
TEST FACILITIES