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Modelling gas flow pressure gradients in Gelcast ceramic foam diesel particulate filters

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journal contribution
posted on 01.04.2009 by Emmanuel M. Adigio, J.G.P. Binner, Colin Garner, Richard J.M. Hague, Andrew Williams
New mathematical models are proposed that predict fluid flow pressure gradients in gelcast ceramic foam diesel exhaust particulate filters by considering the foam structure conceptually as serially connected orifices. The resulting multiple orifice mathematical (MOM) model is based on the sum of a viscous term derived from an extended Ergun model and the kinetic energy loss derived from the Bernoulli and conservation of mass equations. The MOM model was calibrated using experimental data obtained from measuring the air flowrate and pressure drop across a physical large-scale three-dimensional model of a cellular foam structure produced using rapid manufacturing techniques. The calibrated model was then validated using fluid flow data obtained from gelcast ceramic foam filters of various cell sizes and was found to require no empirical recalibration for each gelcast ceramic foam sample. The MOM model for clean filters was extended to predict pressure gradients of filters loaded with particulate matter (PM). The prediction of pressure gradients through gelcast ceramic filters using the MOM model for clean and PM-loaded cases was shown to be in reasonable agreement with experimental data. The models were finally applied to design a filter for a turbocharged, charge-cooled, 2.0 l, fourstroke, common rail, direct injection passenger car diesel engine.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

ADIGIO, E.M. ... et al., 2008. Modelling gas flow pressure gradients in Gelcast ceramic foam diesel particulate filters. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 222 (8), pp. 1471-1487

Publisher

© Professional Engineering Publishing

Version

VoR (Version of Record)

Publication date

2008

Notes

This article was published in the journal, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering [© Professional Engineering Publishing]. The definitive version is available at: http://journals.pepublishing.com/content/119783/?sortorder=asc&v=editorial&p_o=0

ISSN

0954-4070

Language

en

Exports