This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Heat Release Rate Modeling Improvement in an Eulerian 1D Diesel Combustion Model
Technical Paper
2018-01-1127
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Diesel engines are being more commonly used for light automotive applications, due to their higher efficiency. However, pollutant emissions can be higher than their gasoline counterparts, being difficult to reduce and control because reducing one pollutant increases another. One way to reduce emissions is by using multiple injection strategies. However, understanding multiple injections is no easy task, so far done by trial and error and experience.
Therefore, a numerical 1D model is to be adapted to simulate multiple injection situations in a diesel engine. In a previous paper by the authors, an existing model was adapted with a thermal dilatation model to consider both radial and axial dilatations in the diesel spray. The base model used is that of Ma et al (based on the Eulerian model of Musculus and Kattke for inert diesel jets). One limitation found on this model was the difference in the heat release and pressure rise curves with respect to the experimental data, resulting in an erroneous estimation of the combustion chamber pressure, which will be crucial to the modeling of multiple injections.
To improve this calculation, a mapping of the mixture fraction and reactants fraction is proposed, following the work of Tap and Veynante for diffusion flames, which in turn is based on the Burke-Schumann approach of infinitely fast chemistry for the combustion modeling. A gradual transition from a mixture regime to a steady combustion is modeled by the average reaction rate calculated using Chemkin. A radial distribution of fractions is made by using the mixture fraction distribution instead of the fuel fraction distribution (such as described in Desantes et al.), and then applying the previous mapping. The resulting plots of heat release and pressure rise have improved precision, leading to a better estimation of the combustion chamber pressure, critical to a good modeling of the multiple injection phenomena.
Recommended Content
Authors
Topic
Citation
Aljure, A., Tauzia, X., and Maiboom, A., "Heat Release Rate Modeling Improvement in an Eulerian 1D Diesel Combustion Model," SAE Technical Paper 2018-01-1127, 2018, https://doi.org/10.4271/2018-01-1127.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 |
Also In
References
- Heywood , J.B. and Heywood , J.B. Internal Combustion Engine Fundamentals New York McGraw-Hill Book Company 1988
- Dec , J.E. , Davisson , M.L. , Sjöberg , M. , Leif , R.N. , and Hwang , W. Detailed HCCI Exhaust Speciation and the Sources of Hydrocarbon and Oxygenated Hydrocarbon Emissions SAE Technical Paper 2008-01-0053 2008 10.4271/2008-01-0053
- de Ojeda , W. , Zoldak , P. , Espinosa , R. , and Kumar , R. Development of a Fuel Injection Strategy for Diesel LTC SAE Technical Paper 2008-01-0057 2008 10.4271/2008-01-0057
- Badami , M. , Mallamo , F. , Millo , F. , and Rossi , E.E. Experimental Investigation on the Effect of Multiple Injection Strategies on Emissions, Noise and Brake Specific Fuel Consumption of an Automotive Direct Injection Common-Rail Diesel Engine Int. J. Engine Res. 4 4 2003 10.4271/2016-01-0871
- Dec , J.E. A Conceptual Model of D.I. Diesel Combustion Based on Laser-Sheet Imaging SAE Technical Paper 970873 106 3 1319 1348 1997 10.4271/970873
- Hiroyasu , H. and Arai , M. Development and Use of a Spray Combustion Modeling to Predict Diesel Engine Efficiency and Pollutant Emissions JSME 26 214 1983
- Pastor , J.V. , López , J.J. , García , J.M. , and Pastor , J.M. A 1D Model for the Description of Mixing-Controlled Inert Diesel Sprays Fuel 87 2871 2885 2008
- Musculus , M. and Kattke , K. Entrainment Waves in Diesel Jets SAE Technical Paper 2009-01-1355 2009 10.4271/2009-01-1355
- Ma , G. 2013
- Aljure , A. , Tauzia , X. , and Maiboom , A. Comparison of Eulerian and Lagrangian 1D Models of Diesel Fuel Injection and Combustion SAE Technical Paper 2017-24-0006 2017 10.4271/2017-24-0006
- Abramovich , G.N. 1963
- Naber , J. and Siebers , D.L. Effects of Gas Density and Vaporization on Penetration and Dispersion of Diesel Sprays SAE Tehnical Paper 960034 1996 10.4271/960034
- Desantes , J.M. , Pastor , J.V. , and García-Oliver , J.M. A 1D model for the Description of Mixing-Controlled Reacting Diesel Sprays Combust Flame 156 234 249 2009
- Engine Combustion Network ECN Data Search 2016 https://ecn.sandia.gov/ecn-data-search/
- Ma , G. , Tauzia , X. , and Maiboom , A. One-Dimensional Combustion Model with Detailed Chemistry for Transient Diesel Sprays Proc IMechE Part D: J Automobile Engineering 228 4 457 476 2014
- Tauzia , X. , Maiboom , A. , and Ma , G. A 1D Model for Diesel Sprays under Reacting Conditions SAE Technical Paper 2015-24-2395 2015 10.4271/2015-24-2395
- Kee , R.J. , Rupley , F.M. , and Miller , J.A. 1989
- Picket , L.M. , Manin , J. , Genzale , C.L. , Siebers , D.L. et al. Relationship Between Diesel Fuel Spray Vapor Penetration/Dispersion and Local Fuel Mixture Fraction SAE Technical Paper 2011-01-0686 2011 10.4271/2011-01-0686
- Tap , F.A. , Hilbert , R. , Thévenin , D. , and Veynante , D. A Generalized Flame Surface Density Modelling Approach for the Auto-Ignition of a Turbulent Non-Premixed System Combustion Theory Modelling 8 165 193 2004
- National Institute of Standards and Technology WebBook de Chimie NIST - Dodecane http://webbook.nist.gov 2017
- Darabiha , N. , Esposito , E. , Lacas , F. , and Veynante , D. 2006
- Engine Combustion Network Combustion Vessel Geometry 2016 https://ecn.sandia.gov/diesel-spray-combustion/sandia-cv/combustion-vessel-geomertry/
- Engine Combustion Network Injector Characterization 2016 https://ecn.sandia.gov/diesel-spray-combustion/sandia-cv/injector-characterization/2007-to-present/
- Skeen , S. , Manin , J. , and Pickett , L.M. Visualization of Ignition Processes in High-Pressure Sprays with Multiple Injections of n-Dodecane SAE Int. J. Engines 8 2 2015
- Poinsot , T. and Veynante , D. Theoretical and Numerical Combustion Second R.T. Edwards, Inc. 2005