This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Fast Physical Prediction of NO and Soot in Diesel Engines
Technical Paper
2009-01-1121
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A clear trend in engine development is that the engines are becoming more and more complex both regarding components and component-systems as well as controlling them. These complex engines have great potential to minimize emissions but they also have a great number of combinations of setting. Systematic testing to find these optimum settings is getting more and more challenging. A possible remedy is to roughly optimize these settings offline with predictive models and then only perform the fine tuning in the engine test bed. To be able to do so, two things are needed; firstly a engine model that will predict how the different setting affect engine performance and secondly how the engine performance affects the emissions.
This article shows a new approach for predicting soot emissions. The frame of the model is a multizone approach developed for NO formation prediction. Soot is, in the presented model, predicted by assuming that a roughly constant fraction of the fuel remains as soot on the lean side of the flame and thereafter modelling the conditions for post-flamefront oxidation. The post-flamefront oxidation is assumed to be dominated by surface oxidation, modelled with the Nagle and Strickland Constable oxidation model. By using this simplified emissions model and by replacing time demanding equations with look-up tables, the calculation time needed to predict both NO and soot was reduced to approximately 0.15 seconds per engine cycle.
The resulting model shows good agreement with measured emissions for both NOx and soot over a wide range of operating conditions with conventional diesel combustion.
Recommended Content
Authors
Citation
Westlund, A. and Ångström, H., "Fast Physical Prediction of NO and Soot in Diesel Engines," SAE Technical Paper 2009-01-1121, 2009, https://doi.org/10.4271/2009-01-1121.Also In
References
- Winkler N Ångström H-E Simulations and measurements of a two-stage turbocharged heavy-duty diesel engine including EGR in transient operation SAE paper 2008-01-0539 2008
- Westlund A Winkler N Diotallevi F. Ångström H.E. Predictions and measurements of transient NO emissions for a two-stage turbocharged HD Diesel engine with EGR THIESEL 2008 conference proceedings 2008
- Rente T. Injection strategies for Heavy Duty DI Diesel Engines Doctoral thesis Chalmers University of Technology 2004
- Heywood J. B. Internal combustion engine fundamentals McGraw-Hill 1998
- Xi J. Zhong B-J Review: soot in diesel combustion systems Chemical Engineering Technology 29 6 2006
- Egnell R. On zero-dimensional modelling of combustion and NOx formation in diesel engines Doctoral thesis Lund University 2001
- Magnus Andersson Fast NOx prediction in diesel engines Licentiate thesis Lund University 2006
- Desantes J. M. Arregle J. Molina S. Influence of the EGR rate, oxygen concentration and equivalent fuel/air ratio on the combustion behaviour and pollutant emissions of a heavy duty diesel engine SAE 2000-01-1813 2000
- Akihama K. Takatori Y. Inagaki K. Sasaki S. Dean A. M. Mechanism of the smokeless rich combustion by reducing temperature SAE 2001-01-0655 2001
- Kitamura T Ito T Senda J Fujimoto H Mechanism of smokeless diesel combustion with oxygenated fuels based on the dependence of the equivalence ratio and temperature on soot particle formation International Journal for Engine Research 3 4 2002
- Saric F. A detailed kinetic model for calculation of the soot partile size distribution function Doctoral thesis Lund University 2006
- Netzell K. Development and application of detailed kinetic models for the soot particle size distribution function Doctoral thesis Lund University 2006
- Tao F. Liu Y. RempelEwert B.H. Foster D.E Reitz R.D. Choi D. Miles P.C. Modeling the effects of EGR and injection pressure on soot formation in a high speed direct injection (HSDI) diesel engine using a multi-step Phenomenological soot model SAE 2005-01-0121 2005
- Tao F. Golovitchev V. I. Chomiak J. A phenomenological model for the prediction of soot formation in diesel spray combustion Combustion and flame 136 270-282 2004
- Tao F. Srinivas S. Reitz R. D. Foster D. E. Comparison of three soot models applied to multidimensional diesel combustion simulations JSME International Journal B 48 4 2005
- Fusco A. Knox-Kelecy A.L. Foster D.E. Application of a phenomenological soot model to diesel engine combustion International symposium Comodia 94 1994
- Vlasek K Macek J Boulouchos K Simulation of combustion in a heavy duty diesel engine with focus on soot formation Paper code F02V165
- Boulouchos K. Kirchen P. A phenomenological mean value soot model for transient engine operation MTZ 07-0812008 69 2008
- Kaario O. Antila E. Larmi M. Applying soot phi-T maps for engineering CFD applications in diesel engines SAE 2005-01-3856 2005
- Dec J. E. A conceptual model of DI diesel combustion based on laser-sheet imaging 970873 1997
- Kosaka H. Aizawa T. Kamimoto T. Two-dimensional imaging of ignition and soot formation processes in a diesel flame International Journal for engine research 6 1 2005
- Charlton S Heavy-Duty Diesel Emission Control Symposium, presentation 2007
- Fabrizio Diotavelli Development of a multi-zone model for NOx formation in diesel engines Master thesis KTH Royal Institute of Technology 2007
- Lapuerta M Hernandez J J Armas O Kinetic modelling of gaseous emissions in a diesel engine SAE paper 2000-01-2939 2000
- Alkidas C. Relationships between smoke measurements and particulate measurements SAE 840412 1984