This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Predicting the Combustion Behavior in a Small-Bore Diesel Engine
Technical Paper
2021-01-0508
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Event:
SAE WCX Digital Summit
Language:
English
Abstract
Accurate modeling of the characteristics of diesel-engine combustion leads to more efficient design. Accurate modeling in turn depends on correctly capturing spray dynamics, turbulence, and fuel chemistry. This work presents a computational fluid dynamics (CFD) investigation of a well characterized small-bore direct injection diesel engine at Sandia National Laboratories’ Combustion Research Facility. The engine has been studied for two piston-bowls geometries and various injection timings. Simulation of these conditions test the predictive capabilities of our approach to diesel engine modeling using Ansys Forte. An experimental database covering a wide range of operating conditions is provided by the Engine Combustion Network for this engine, which is used to validate our modeling approach. Automatic and solution-adaptive meshing is used, and the recommended settings are discussed. The analyses capture the turbulent effects on the flow field with both the conventional and the stepped-lip piston bowls. The flow mixing sensitivity to the bowl features is consistent with the data for the two configurations in this swirl-supported diesel combustion. The fuel injected is made of n-hexadecane and heptamethylnonane, and the workflow involved in deriving an accurate chemistry mechanism from the well validated Ansys Model Fuel Library is reported. The same set of spray breakup and atomization model constant values is used in all simulation cases. The good agreement with the experiments provides confidence in the reliability of the simulation approach in the development of the next generation of light-duty engines.
Recommended Content
Authors
Topic
Citation
Litrico, G., Puduppakkam, K., Liang, L., and Meeks, E., "Predicting the Combustion Behavior in a Small-Bore Diesel Engine," SAE Technical Paper 2021-01-0508, 2021, https://doi.org/10.4271/2021-01-0508.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 | ||
Unnamed Dataset 5 |
Also In
References
- Liu , Y. and Reitz , R. Optimizing HSDI Diesel Combustion and Emissions Using Multiple Injection Strategies SAE Technical Paper 2005-01-0212 2005 https://doi.org/10.4271/2005-01-0212
- Hardy , W. and Reitz , R. An Experimental Investigation of Partially Premixed Combustion Strategies Using Multiple Injections in a Heavy-Duty Diesel Engine SAE Technical Paper 2006-01-0917 2006 https://doi.org/10.4271/2006-01-0917
- Kimura , S. , Aoki , O. , Ogawa , H. , Muranaka , S. et al. New Combustion Concept for Ultra-Clean and High-Efficiency Small DI Diesel Engines SAE Technical Paper 1999-01-3681 1999 https://doi.org/10.4271/1999-01-3681
- Cornwell , H. and Conicella , T.F. Direct Injection Diesel Engine 2014
- Iikubo , H.S. et al. Combustion Chamber Structure for Direct Injection Diesel Engine 2012
- Stanton , D.W. et al. Internal Combustion Engine Producing Low Emissions 2007
- Dolak , J. , Shi , Y. , and Reitz , R. A Computational Investigation of Stepped-Bowl Piston Geometry for a Light Duty Engine Operating at Low Load SAE Technical Paper 2010-01-1263 2010 https://doi.org/10.4271/2010-01-1263
- Busch , S. Vehicle Technologies Office Merit Review 2017: Light-Duty Diesel Combustion 2017
- Busch , S. Vehicle Technologies Office Merit Review 2018: Light-and Medium-Duty Diesel Combustion 2018
- Perini , F. , Zha , K. , Busch , S. , Miles , P. et al. Principal Component Analysis and Study of Port-Induced Swirl Structures in a Light-Duty Optical Diesel Engine SAE Technical Paper 2015-01-1696 2015 https://doi.org/10.4271/2015-01-1696
- Perini , F. , Reitz , R. and Miles , P. Study of In-Cylinder Swirl Flow Structures Using Principal Component Analysis 2015
- Perini , F. , Miles , P. and Reitz , R. A Comprehensive Modeling Study of In-Cylinder Fluid Flows in a High-Swirl, Light-Duty Optical Diesel Engine Computers & Fluids 2014 113 124 105
- Perini , F. et al. Piston Geometry Effects in a Light-Duty, Swirl-Supported Diesel Engine: Flow Structure Characterization International Journal of Engine Research 2018 19
- Busch , S. and Perini , F. Progress toward Understanding Vortex Generation in Stepped-Lip Diesel Results in Engineering 2019 1
- Busch , S. , Zha , K. , Perini , F. , Reitz , R. et al. Bowl Geometry Effects on Turbulent Flow Structure in a Direct Injection Diesel Engine SAE Technical Paper 2018-01-1794 2018 https://doi.org/10.4271/2018-01-1794
- ECN, Engine Combustion Network Aug. 05, 2020 https://ecn.sandia.gov/engines/small-bore-diesel-engine/cfd/
- Ansys Forte 2020
- Beale , J.C. and Reitz , R.D. Modeling Spray Atomization with the Kelvin-Helmholtz/Rayleigh-Taylor Hybrid Model 9 623 650 1999
- Su , T.F. et al. Experimental and Numerical Studies of High Pressure Multiple Injection Sprays 1996
- Hou , S. and Schmidt , D.P. Adaptive Collision Meshing and Satellite Droplet Formation in Spray Simulation 32 935 956 2006
- Busch , S. and Miles , P.C. Parametric Study of Injection Rates with Solenoid Injectors in an Injection Quantity and Rate Measuring Device Journal of Engineering for Gas Turbines and Power 137
- Chemkin-Pro 2020
- The Model Fuel Consortium http://www.modelfuelsconsortium.com 2005
- Puduppakkam , K. , Naik , C. , Meeks , E. , Krenn , C. et al. Predictive Combustion and Emissions Simulations for a High Performance Diesel Engine Using a Detailed Fuel Combustion Model SAE Technical Paper 2014-01-2570 2014 https://doi.org/10.4271/2014-01-2570
- Ansys. Verification Manual 2020 https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/fbu_vm/Hlp_vmfrt007.html
- Lu , T. and Law , C.K. Linear Time Reduction of Large Kinetic Mechanisms with Directed Relation Graph: n-Heptane and Iso-Octane 144 24 36 2006
- Lu , T. and Law , C.K. A Directed Relation Graph Method for Mechanism Reduction 30 1333 13341 2005
- Pepiot-Desjardins , P. and Pitsch , H. An Efficient Error-Propagation-Based Reduction Method for Large Chemical Kinetic Mechanisms 154 67 81 2008
- Liang , L. , Stevens , J.G. , and Farrell , J.T. A Dynamic Adaptive Chemistry Scheme for Reactive Flow Computation 32 527 534 2009
- Busch , S. , Zha , K. , Kurtz , E. , Warey , A. et al. Experimental and Numerical Studies of Bowl Geometry Impacts on Thermal Efficiency in a Light-Duty Diesel Engine SAE Technical Paper 2018-01-0228 2018 https://doi.org/10.4271/2018-01-0228
- Naik , C. , Puduppakkam , K. , and Meeks , E. Simulation and Analysis of In-Cylinder Soot Formation in a Low Temperature Combustion Diesel Engine Using a Detailed Reaction Mechanism SAE Int. J. Engines 6 2 1190 1201 2013 https://doi.org/10.4271/2013-01-1565
- Zha , K. , Busch , S. , Warey , A. , Peterson , R. et al. A Study of Piston Geometry Effects on Late-Stage Combustion in a Light-Duty Optical Diesel Engine Using Combustion Image Velocimetry SAE Int. J. Engines 11 6 783 804 2018 https://doi.org/10.4271/2018-01-0230
- Busch , S. , Zha , K. , and Miles , P.C. Investigations of Closely Coupled Pilot and Main Injections as a Means to Reduce Combustion Noise THIESEL Valencia, Spain 2014
- Perini , F. , Dempsey , A. , Reitz , R. , Sahoo , D. et al. A Computational Investigation of the Effects of Swirl Ratio and Injection Pressure on Mixture Preparation and Wall Heat Transfer in a Light-Duty Diesel Engine SAE Technical Paper 2013-01-1105 2013 https://doi.org/10.4271/2013-01-1105