A Mixture Fraction Averaged Approach to Modeling NO and Soot in Diesel Engines Purdue University

Format:

Conference/Event

Author/Creator:

Wadhwa, Amrita R., author.

Conference Name:

SAE 2001 World Congress (2001-03-05 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

Multidimensional models are increasingly employed to predict NO and soot emissions from Diesel engines. In the traditional approach, the ensemble-averaged values of variables are employed in the expressions for NO and soot formation and oxidation. In the mixture fraction averaged approach, the values of state variables and species concentrations are obtained from the structure of laminar diffusion flames. The source terms for NO and soot are then obtained by averaging across the mixture fraction coordinate with a probability density function. The clipped-Gaussian probability density function and profiles obtained by employing the OPPDIF code (part of the CHEMKIN package) for the laminar flame structure are employed in this work. The Zeldovich mechanism for NO formation and the Moss and others formation and Nagle-Strickland-Constable oxidation model for soot have been employed to study the qualitative trends of pollutants in transient combusting Diesel jets. Computations are carried out in an axisymmetric constant volume chamber to evaluate the approach. It is shown that the computed NO and soot behavior and the jet flowfield structure are consistent with experimental findings

Notes:

Vendor supplied data

Publisher Number:

2001-01-1005

Access Restriction:

Restricted for use by site license