This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Predictive CFD Auto-Tuning Approach for In-Cylinder Simulations of Two Small-Bore LDD Engines
Technical Paper
2019-24-0033
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Tightening emission regulations and accelerating production cycles force engine developers to shift their attention towards virtual engineering tools. When simulating in-cylinder processes in commercial LDD DI engine development, the trade-off between run time and accuracy is typically tipped towards the former. High-fidelity simulation approaches which require little tuning would be desirable but require excessive computing resources. For this reason, industry still favors low-fidelity simulation approaches and bridges remaining uncertainties with prototyping and testing. The problem with low-fidelity simulations is that simplifications in the form of sub models introduce multi variable tuning parameter dependencies which, if not understood, impair the predictive nature of CFD simulations.
In previous work, the authors have successfully developed a boundary condition dependent input parameter table. This parameter table showed outstanding results for lab-scale experiments for over 40 varying operating conditions. The objective in this paper is first to identify the necessary considerations to adjust for the inherent differences between lab-scale and real engine conditions and then implement this parameter table into industry relevant conditions. With this approach the appropriate simulation setup for a real EU6 diesel engine can be predefined by the boundary conditions without previous tuning iterations. The performance of the simulation will be assessed based on its capability to match experimental heat release and chamber pressure data. The approach shown here has the potential to remove the necessity of lengthy tuning iterations and lays the groundwork for novel auto-tuned and predictive in-cylinder simulations.
Recommended Content
Authors
Topic
Citation
Nsikane, D., Vogiatzaki, K., Morgan, R., Mustafa, K. et al., "Predictive CFD Auto-Tuning Approach for In-Cylinder Simulations of Two Small-Bore LDD Engines," SAE Technical Paper 2019-24-0033, 2019, https://doi.org/10.4271/2019-24-0033.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 |
Also In
References
- Nsikane , D. M. , Mustafa , K. , Ward , A. , Morgan , R. et al. Statistical Approach on Visualizing Multi-Variable Interactions in a Hybrid Breakup Model under ECN Spray Conditions SAE Int. J. Engines 10 5 2017 10.4271/ 2017-24-0104
- Nsikane , D. , Vogiatzaki , K. , Morgan , R. , and Heikal , M. Assessment of the Performance of Conventional Spray Models under High Pressure and High Temperature Conditions Using a “Design of Experiments” Approach ICLASS 2018, 14th Triennial International Conference on Liquid Atomization and Spray Systems Chicago, USA 2018 http://ilasseurope.org/events/iclass-2018/
- Busch , S. Engine Combustion Network - Small-bore diesel engine https://ecn.sandia.gov/engines/small-bore-diesel-engine/ 2019
- Zha , K. , Busch , S. , Miles , P. C. , Wijeyakulasuriya , S. et al. Characterization of Flow Asymmetry During the Compression Stroke Using Swirl-Plane PIV in a Light-Duty Optical Diesel Engine with the Re-entrant Piston Bowl Geometry SAE Int. J. Engines 8 1837 1855 2015 10.4271/2015-01-1699
- Busch , S. et al. Experimental and Numerical Investigations of Close-Coupled Pilot Injections to Reduce Combustion Noise in a Small-Bore Diesel Engine SAE Int. J. Engines 8 660 678 2015 10.4271/2015-01-0796
- Petersen , B. R. , Ekoto , I. W. , and Miles , P. C. An Investigation into the Effects of Fuel Properties and Engine Load on UHC and CO Emissions from a Light-Duty Optical Diesel Engine Operating in a Partially Premixed Combustion Regime SAE Int. J. Engines 3 38 55 2010 10.4271/ 2010-01-1470
- Sahoo , D. , Petersen , B. , and Miles , P. C. Measurement of Equivalence Ratio in a Light-Duty Low Temperature Combustion Diesel Engine by Planar Laser Induced Fluorescence of a Fuel Tracer SAE Int. J. Engines 4 2312 2325 2011 10.4271/ 2011-24-0064
- Ekoto , I. W. et al. UHC and CO Emissions Sources from a Light-Duty Diesel Engine Undergoing Dilution-Controlled Low-Temperature Combustion SAE Int. J. Engines 2 411 430 2009 10.4271/ 2009-24-0043
- Sahoo , D. , Miles , P. C. , Trost , J. , and Leipertz , A. The Impact of Fuel Mass, Injection Pressure, Ambient Temperature, and Swirl Ratio on the Mixture Preparation of a Pilot Injection SAE Int. J. Engines 6 1716 1730 2013 10.4271/ 2013-24-0061
- Miles , P. C. , Sahoo , D. , Busch , S. , Trost , J. , and Leipertz , A. Pilot Injection Ignition Properties under Low-Temperature, Dilute in-Cylinder Conditions SAE Int. J. Engines 6 1888 1907 2013 10.4271/ 2013-01-2531
- Li , G. , Sapsford , S. M. , and Morgan , R. E. 2000 10.4271/2000-01-2940
- Jones , W. P. and Launder , B. E. The Prediction of Laminarization with a Two-equation Model of Turbulence International Journal of Heat and Mass Transfer 15 2 301 314 1972 10.1016/0017-9310(72)90076-2
- Lefebvre , A. Atomization and Sprays Taylor & Francis 1988
- Beale , J. C. Modeling Fuel Injection Using Kelvin-Helmholtz/Rayleigh-Taylor Hybrid Atomization Model in KIVA-3V Madison University of Wisconsin 1999
- Putnam , A. Integratable Form of Droplet Drag Coefficient J. Am. Rocket Soc. 31 1467 4798 1961
- The Combustion of Liquid Fuels Presented at the 4th Symposium (International) on Combustion Baltimore 1953
- The Role of the Heat-up Period in Fuel Drop Evaporation Int. J. Turbo Jet Engines 2 315 325 1985
- Livengood , J. C. and Wu , P. C. Correlation of Autoignition Phenomena in Internal Combustion Engines and Rapid Compression Machines Symposium (International) on Combustion 5 1 347 356 1955 10.1016/S0082-0784(55)80047-1
- Chen , C. , Bardsley , M. E. A. , and Johns , R. J. R. 2000 10.4271/2000-01-2810
- Metghalchi , M. and Keck , J. C. Burning Velocities of Mixtures of Air with Methanol, Isooctane, and Indolene at High Pressure and Temperature Combustion and Flame 48 191 210 1982 10.1016/0010-2180(82)90127-4
- Gülder , Ö. L. Turbulent Premixed Flame Propagation Models for Different Combustion Regimes Symposium (International) on Combustion 23 1 743 750 1991 10.1016/S0082-0784(06)80325-5
- Nsikane , D. , Vogiatzaki , K. , and Morgan , R. Predictive Engine Simulations Based on a Novel DoE/RANS Approach with Coefficient Tabulation Presented at the IMechE, Fuel Systems-Engines London 2018
- Pei , Y. , Davis , M. J. , Pickett , L. M. , and Som , S. Engine Combustion Network (ECN): Global Sensitivity Analysis of Spray a for Different Combustion Vessels Combustion and Flame 162 6 2337 2347 2015 10.1016/j.combustflame.2015.01.024
- Pei , Y. , Shan , R. , Som , S. , Lu , T. , Longman , D. , and Davis , M. J. 2014 10.4271/2014-01-1117
- Pickett , L. M. et al. Comparison of Diesel Spray Combustion in Different High-Temperature, High-Pressure Facilities SAE Int. J. Engines 3 2 156 181 2010 10.4271/2010-01-2106
- Liu , A. B. , Mather , D. , and Reitz , R. D. 1993 10.4271/930072
- Crua , C. , Heikal , M. R. , and Gold , M. R. Microscopic Imaging of the Initial Stage of Diesel Spray Formation Fuel 157 140 150 2015 10.1016/j.fuel.2015.04.041
- Siebers , D. L. 1998 10.4271/980809
- Sykes , D. , de Sercey , G. , Gold , M. , Pearson , R. , and Crua , C. Visual Analyses of End of Injection Liquid Structures and the Behaviour of Nozzle Surface-Bound Fuel in a Direct Injection Diesel Engine SAE Technical Paper 2019-01-15 2019 10.4271/2019-01-15
- Naber , J. D. and Siebers , D. L. 1996 10.4271/960034