Turbulent Temperature Fluctuations in Spark Ignition Engines and Their Effect on NOx Emissions First American Scientific Corporation

Format:

Conference/Event

Author/Creator:

Narayan, Sundar, author.

Conference Name:

SAE 2004 World Congress & Exhibition (2004-03-08 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2004

Summary:

Temperature fluctuations in the turbulent flow-field inside an engine's cylinder are important because they enhance the rates of the NO forming reactions. This work presents a zero-dimensional model for the root mean square (r.m.s) temperature fluctuations in a spark ignition engine. A thermodynamic combustion model is used to compute the NO formation rates after accounting for the effect of temperature fluctuations on the reaction rates. The computed tailpipe Zeldovich NO emissions may be up to 25 % higher because of the inclusion of the effect of the temperature fluctuations. It may also be necessary to add the contribution of prompt NO and the turbulent N2O mechanism to the turbulent Zeldovich NO so as to match the experimentally observed values under lean conditions

Notes:

Vendor supplied data

Publisher Number:

2004-01-0623

Access Restriction:

Restricted for use by site license