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Effects of Geometry on Passive Pre-Chamber Combustion Characteristics
Technical Paper
2020-01-0821
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Towards a fundamental understanding of the ignition characteristics of pre-chamber (PC) combustion engines, computational fluid dynamics (CFD) simulations were conducted using CONVERGE. To assist the initial design of the KAUST pre-chamber engine experiments, the primary focus of the present study was to assess the impact of design parameters such as throat diameter, nozzle diameter, and nozzle length. The well-stirred reactor combustion model coupled with a methane oxidation mechanism reduced from GRI 3.0 was used. A homogeneous charge of methane and air with λ = 1.3 on both the PC and main chamber (MC) was assumed. The geometrical parameters were shown to affect the pre-chamber combustion characteristics, such as pressure build-up, radical formation, and heat release as well as the composition of the jets penetrating and igniting the main chamber charge. In addition, the backflow of species pushed inside the pre-chamber due to the flow reversal (FR) event was analyzed. It was found that the narrow throat type of pre-chamber is strongly influenced by the throat diameter, but weakly influence by nozzle length. A flow reversal pattern was observed, which promoted the accumulation of intermediate species in the PC, leading to a secondary heat release.
Authors
- Mickael Silva - King Abdullah University of Science & Technology
- Sangeeth Sanal - King Abdullah University of Science & Technology
- Ponnya Hlaing - King Abdullah University of Science & Technology
- Emre Cenker - Saudi Aramco
- Bengt Johansson - King Abdullah University of Science & Technology
- Hong G. Im - King Abdullah University of Science & Technology
Citation
Silva, M., Sanal, S., Hlaing, P., Cenker, E. et al., "Effects of Geometry on Passive Pre-Chamber Combustion Characteristics," SAE Technical Paper 2020-01-0821, 2020, https://doi.org/10.4271/2020-01-0821.Data Sets - Support Documents
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References
- Gussak, L.A., Karpov, V.P., and Tikhonov, Y.V. , “The Application of Ldg-Process in Prechamber Engines,” 1980.
- Muller, M., et al. , “Numerical Simulation of Ignition Mechanism in the Main Chamber of Turbulent Jet Ignition System”, Volume 2: Emissions Control Systems; Instrumentation, Controls, and Hybrids; Numerical Simulation; Engine Design and Mechanical Development. 2018.
- Syrovatka, Z. et al. , “Scavenged Pre-Chamber Volume Effect on Gas Engine Performance and Emissions,” SAE Technical Paper 2019-01-0258, 2019, https://doi.org/10.4271/2019-01-0258.
- Attard, W.P. et al. , “A Turbulent Jet Ignition Pre-Chamber Combustion System for Large Fuel Economy Improvements in a Modern Vehicle Powertrain,” SAE Int. J. Engines 3(2):20-37, 2010, https://doi.org/10.4271/2010-01-1457.
- Jamrozik, A. , “Lean Combustion by a Pre-Chamber Charge Stratification in a Stationary Spark Ignited Engine,” Journal of Mechanical Science and Technology 29(5):2269-2278, 2015.
- Thelen, B.C. and Toulson, E. , “A Computational Study on the Effect of the Orifice Size on the Performance of a Turbulent Jet Ignition System,” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231(4):536-554, 2016.
- Roethlisberger, R.P. and Favrat, D. , “Investigation of the Prechamber Geometrical Configuration of a Natural Gas Spark Ignition Engine for Cogeneration: Part I. Numerical Simulation,” International Journal of Thermal Sciences 42(3):223-237, 2003.
- Bolla, M. et al. , “Numerical Study of Turbulence and Fuel-Air Mixing within a Scavenged Pre-Chamber Using RANS and LES,” SAE Technical Paper 2019-01-0198, 2019, https://doi.org/10.4271/2019-01-0198.
- Chinnathambi, P., Bunce, M., and Cruff, L. , “RANS Based Multidimensional Modeling of an Ultra-Lean Burn Pre-Chamber Combustion System with Auxiliary Liquid Gasoline Injection,” SAE Technical Paper 2015-01-0386, 2015, https://doi.org/10.4271/2015-01-0386.
- Allison, P.M. et al. , “Pre-Chamber Ignition Mechanism: Experiments and Simulations on Turbulent Jet Flame Structure,” Fuel 230:274-281, 2018.
- Mastorakos, E. et al. , “Fundamental Aspects of Jet Ignition for Natural Gas Engines,” SAE International Journal of Engines 10(5):2429-2438, 2017.
- Malé, Q. et al. , “Large Eddy Simulation of Pre-Chamber Ignition in an Internal Combustion Engine,” Flow, Turbulence and Combustion 103(2):465-483, 2019.
- Hlaing, P. et al. , “A Study of Lean Burn Pre-Chamber Concept in a Heavy Duty Engine,” SAE Technical Paper 2019-24-0107, 2019, https://doi.org/10.4271/2019-24-0107.
- Lu, T. and Law, C.K. , “A Criterion Based on Computational Singular Perturbation for the Identification of Quasi Steady State Species: A Reduced Mechanism for Methane Oxidation with NO Chemistry,” Combustion and Flame 154(4):761-774, 2008.
- Han, Z. and Reitz, R.D. , “Turbulence Modeling of Internal Combustion Engines Using RNG κ-ε Models,” Combustion Science and Technology 106(4-6):267-295, 1995.