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The Impact of Engine Design Constraints on Diesel Combustion System Size Scaling
Technical Paper
2010-01-0180
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A set of scaling laws were previously developed to guide the transfer of combustion system designs between diesel engines of different sizes [
1
,
2
,
3
,
4
]. The intent of these scaling laws was to maintain geometric similarity of key parameters influencing diesel combustion such as in-cylinder spray penetration and flame lift-off length. The current study explores the impact of design constraints or limitations on the application of the scaling laws and the effect this has on the ability to replicate combustion and emissions. Multi dimensional computational fluid dynamics (CFD) calculations were used to evaluate the relative impact of engine design parameters on engine performance under full load operating conditions. The base engine was first scaled using the scaling laws. Design constraints were then applied to assess how such constraints deviate from the established scaling laws and how these alter the effectiveness of the scaling effort. The considered design parameters included engine speed, fuel injection pressure, nozzle hole size, injection duration, compression ratio, intake valve closing, squish height and effective compression ratio. For each test case a start of injection (SOI) sweep was carried out. The impact of the engine parameters on engine-out emissions was evaluated using averaged deviation of the emission data over the range of the SOI tests. The results revealed that duration of injection (DOI) has the biggest impact, followed by the injection velocity both of which are parameters that are related to local equivalence ratio. Injection velocity was found to affect the mixing as well. It was also found that engine speed had a negligible effect on the combustion characteristics within the tested range. This is attributed to the rapid fuel vaporization and the short ignition delay characteristic of the tested conditions.
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Lee, C., Reitz, R., and Kurtz, E., "The Impact of Engine Design Constraints on Diesel Combustion System Size Scaling," SAE Technical Paper 2010-01-0180, 2010, https://doi.org/10.4271/2010-01-0180.Also In
References
- Bergin, M.J. Reitz, R.D. “Soot and NOx Emissions Reduction in Diesel Engines via Spin-Spray Combustion,” presented at ILASS American, 18th Annual Conference on Liquid Atomization and Spray Systems Irvine, CA May 2005
- Stager, L.A. Reitz, R.D. “Assessment of Diesel Engine Size-Scaling Relationships,” SAE 2007-01-0127 2007
- Shi, Y. Reitz, R.D. “Study of Diesel Engine Size-Scaling Relationships Based on Turbulence and Chemistry Scales,” SAE 2008-01-0955 2008
- Staples, L.R. Reitz, R.D. Hergart, C. “An Experimental Investigation into Diesel Engine Size-Scaling Parameters,” SAE 2009-01-1124 2009
- Iwabuchi, Y. Kawai, L. Shoji, T. Takeda, T. “Trial of New Concept Diesel Combustion System - Premixed Compression-Ignition Combustion,” SAE 1999-01-0185 1999
- Kimura, S. Aoki, O. Ogawa, H. Muranaka, S. Enomoto, Y. “New Combustion Concept for Ultra-Clean and High-Efficiency Small Di Diesel Engines,” SAE 1999-01-3681
- Akihama, K. Takitori, Y. Inagaki, K. Sasaki, S. Dean, A. “Mechanism of Smokeless Rich Diesel Combustion by Reducing Temperature,” SAE 2001-01-0655 2001
- Wickman, D.D. Senecal, P.K. Reitz, R.D. “Diesel Engine Combustion Chamber Geometry Optimization Using Genetic Algorithms and Multi-Dimensional Spray and Combustion Modeling,” SAE 2001-01-0547 2001
- Kim, M. Liechty, M.P. Reitz, R.D. “Application of Micro-Genetic Algorithms for the Optimization of Injection Strategies in a Heavy-Duty Diesel Engine,” SAE 2005-01-0219 2005
- Ge, H.W. Shi, Y. Reitz, R.D. Wickman, D.D. Willems, W. “Optimization of a HSDI Diesel Engine for Passenger Cars Using a Multi-Objective Genetic Algorithm and Multi-Dimensional Modeling,” SAE 2009-01-0715 2009
- Siebers, D.L. “Liquid-Phase Fuel Penetration in Diesel Sprays,” SAE 980809 1998
- Siebers, D.L. “Scaling Liquid-Phase Fuel Penetration in Diesel Sprays Based on Mixing-Limited Vaporization,” SAE 1999-01-0528 1999
- Hiroyasu, H. Kadota, T. Arai, M. “Supplementary Comments: Fuel Spray Characterization in Diesel Engines,” Combustion Modeling in Reciprocating Engines Mattavi J.N. Amann C.A. Plenum press New York 1980
- Pickett, L.M. Siebers, D.L. Idicheria, C.A. “Relationship Between Ignition Processes and the Lift-Off Length of Diesel Fuel Jets,” SAE 2005-01-3843 2005
- Siebers, D.L. Higgins, B.S. “Flame Lift-Off on Direct-Injection Diesel Sprays Under Quiescent Conditions,” SAE 2001-01-0530 2001
- Siebers, D.L. Higgins, B.S. Pickett L.M. “Flame Lift-Off on Direct-Injection Diesel Fuel Jets: Oxygen Concentration Effects,” SAE 2002-01-0890 2002
- Lee, C.-W. Reitz, R.D. “Predictions of the Effects of Piston-Liner Crevices on Flow Motion and Emissions in 3-D Diesel Engine Simulations,” Int. J. Engine Res.
- Amsden, A.A. “KIVA-3V release 2, improvements to KIVA-3V,” Technical report No. LA-UR-99-915 Los Alamos National Laboratory 1999
- Han, Z. Reitz, R.D. “Turbulence Modeling of Internal Combustion Engines Using RNG k-ε Models,” Combust. Sci. and Tech. 106 267 295 1995
- Abani, N. Kokjohn, S. Park, S.W. Bergin, M. Munnannur, A. Ning, W. Sun, Y. Reitz, R.D. “An Improved Spray Model for Reducing Numerical Parameter Dependencies in Diesel Engine CFD Simulations,” SAE 2008-01-0970 2008
- Patterson, M.A. Reitz, R.D. “Modeling the Effects of Fuel Spray Characteristics on Diesel Engine Combustion and Emission,” SAE 980131 1998
- Patel, A. Kong, S.C. Reitz, R.D. “Development and Validation of a Reduced Reaction Mechanism for HCCI Engine Simulations,” SAE 2004-01-0558 2004
- Kong, S.-C. Sun, Y. Reitz, R.D. “Modeling Diesel Spray Flame Lift-Off, Sooting Tendency and NOx Emissions Using Detailed Chemistry with Phenomenological Soot Models,” ASME J. Eng. Gas turbines Power 129 252 260 2007
- Bilger, R. W. “The Structure of Turbulent Nonpremixed Flames,” Proceedings of the Combustion Institute 22 475 488 1988