Effect of Combustion Chamber Shape on Air Flow Field in a D.I. Diesel Engine

870338

02/01/1987

Event
SAE International Congress and Exposition
Authors Abstract
Content
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 NOx levels without penalties of smoke emissions and fuel consumption as happens by using conventional toroidal chamber.
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DOI
https://doi.org/10.4271/870338
Pages
12
Citation
Bertoli, C., Corcione, F., Police, G., and Valentino, G., "Effect of Combustion Chamber Shape on Air Flow Field in a D.I. Diesel Engine," SAE Technical Paper 870338, 1987, https://doi.org/10.4271/870338.
Additional Details
Publisher
Published
Feb 1, 1987
Product Code
870338
Content Type
Technical Paper
Language
English