This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Combustion Chamber Shape on Air Flow Field in a D.I. Diesel Engine
Annotation ability available
Sector:
Language:
English
Abstract
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.
Recommended Content
Authors
Topic
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.Also In
References
- Komiyana K. Kajiyama K. Okada M. “Investigation and Development of a Turbulent Open Combustion Chamber.” SAE 800967
- Lancaster D.R. “Effect of Engine Variables on Turbulence in a Spark-Ignition Engine.” SAE 760159
- Witze P.O. “Measurements of the Spatial Distribution and Engine Speed Dependence of Turbulent Air Motion in an IC Engine.” SAE 770220
- Sertoli C. Corcione F.E. Police G. Valentino G. “Effect of inlet Port Geometry on Turbulent Air Flow in the Combustion Chamber of a D.I. Diesel Engine.” COMODIA 1985 TOKYO 273 283
- Greeves G. Wang C.H.T. “Origins of Diesel Particulate Mass Emissions.” SAE 810260