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A one-dimensional model for heat release rate and emission formation in diesel engines based on correlations for entrainment rate, lift-off length and ignition delay: Validation for transient conditions
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Internal Combustion Engines.
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Internal Combustion Engines.
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.), Internal Combustion Engines.
2012 (English)In: Proceedings of the Institution of mechanical engineers. Part D, journal of automobile engineering, ISSN 0954-4070, E-ISSN 2041-2991, Vol. 226, no D9, 1243-1258 p.Article in journal (Refereed) Published
Abstract [en]

A simplified one-dimensional model for combustion and emission formation in diesel engines has been developed in a project where the long-term objective is to predict the emissions during transient operation. The models are intended to be used as a tool for pre-development of after-treatment systems and for offline calibration of engine controls. These applications imply that the final model must be both computationally inexpensive and comprehensive. The model is based on a correlation for the air entrainment rate which is applied to a discretized injection event. On this, the combustion rate and the emission formation rate are imposed with simple models. In this publication, the model is validated for the targeted conditions and transient operation. The model is based on a previously presented model which was evaluated for steady state conditions. The model presented here has been modified to address the shortcomings that were identified in the previous evaluation. The model was able to predict the heat release rate and the emissions of nitrogen oxide ( NO) and soot with reasonable accuracy and also the requirement regarding the computational time was met. The average time for simulation of one engine cycle was approximately 3 s on a standard laptop.

Place, publisher, year, edition, pages
2012. Vol. 226, no D9, 1243-1258 p.
Keyword [en]
Diesel combustion model, emission model, transient emissions
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-104288DOI: 10.1177/0954407012440209ISI: 000309212500009Scopus ID: 2-s2.0-84870404651OAI: oai:DiVA.org:kth-104288DiVA: diva2:565208
Note

QC 20121106

Available from: 2012-11-06 Created: 2012-10-31 Last updated: 2017-12-07Bibliographically approved

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Westlund, AndersLindström, MikaelÅngström, Hans-Erik
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