On the correlation between gas velocity and combustion pressure fluctuations in a spark-ignition engine

Conference · Thu Jan 01 00:00:00 EST 1981 · Symp. (Int.) Combust., (Proc.); (United States)

OSTI ID:5050611

Cole, J B; Swords, M D

The interaction between a fluctuating velocity field and spark ignited combustion in a lean burning engine has been studied using conditionally sampled laser-Doppler anemometry. The measurements show a strong correlation between relatively large scale velocity fluctuations in the spark gap region of the cylinder at the ignition timing and the ultimate combustion efficiency. A much weaker correlation between high frequency turbulence and combustion pressures was observed. A development of the technique that allowed measurements to be made on each cycle of the engine showed that the dominant contribution to the total turbulence intensity in the cylinder is from large scale low frequency fluctuations. 13 refs.

• Research Organization: Shell Res Ltd, Chester, Engl
• OSTI ID: 5050611
• Report Number(s): CONF-800809-
• Journal Information: Symp. (Int.) Combust., (Proc.); (United States), Conference: 18. combustion symposium, Waterloo, Canada, 17 Aug 1980
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AUTOMOBILES
SPARK IGNITION ENGINES
COMBUSTION CHAMBERS
PRESSURE GRADIENTS
TURBULENT FLOW
COMBUSTION KINETICS
ANEMOMETERS
COMBUSTION
FUEL-AIR RATIO
GAS FLOW
LASERS
TURBULENCE
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ENGINES
FLUID FLOW
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
KINETICS
MEASURING INSTRUMENTS
OXIDATION
REACTION KINETICS
THERMOCHEMICAL PROCESSES
VEHICLES
330101* - Internal Combustion Engines- Spark-Ignition
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry