Effect of combustion chamber shape on air flow field in a D. I. diesel engine
The behaviour of two combustion chambers, a toroidal and a turbulent one, has been compared. The engine performance in terms of imep and exhaust emissions were measured. Laser Doppler Anemometry technique was used to characterize the fluids dynamic aspect of combustion system. The axial asymmetry introduced in combustion chamber shape causes strong differences in the air flow field at the end of compression stroke. The tangential velocity profile is flattened to that obtained with toroidal chamber. Moreover the rms values of tangential velocity measured in turbulent combustion chamber are about three times higher than that measured in the toroidal chamber. At low engine speed the turbulent chamber allows to operate with low NO/sub x/ levels without penalties of smoke emissions and fuel consumption as happens by using conventional toroidal chamber.
- Research Organization:
- Istituto Motori CNR, Naples
- OSTI ID:
- 6425299
- Report Number(s):
- CONF-870204-
- Resource Relation:
- Conference: Society of Automotive Engineers international congress and expo, Detroit, MI, USA, 23 Feb 1987; Other Information: 870338
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
COMBUSTION CHAMBERS
AIR FLOW
COMBUSTION CONTROL
TOROIDAL CONFIGURATION
DIESEL ENGINES
AIR POLLUTION ABATEMENT
AIR POLLUTION MONITORING
ANEMOMETERS
AXIAL SYMMETRY
COMBUSTION KINETICS
COMPRESSION RATIO
DOPPLER EFFECT
EMISSION
EXHAUST GASES
FLOW RATE
FUEL-AIR RATIO
LASERS
NITROGEN OXIDES
PERFORMANCE
TURBULENT FLOW
ANNULAR SPACE
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CONFIGURATION
CONTROL
ENGINES
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
KINETICS
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
REACTION KINETICS
SPACE
SYMMETRY
WASTES
330102* - Internal Combustion Engines- Diesel
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)