This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of Geometry on Passive Pre-Chamber Combustion Characteristics
Technical Paper
2020-01-0821
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
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
- Bengt Johansson - King Abdullah University of Science & Technology
- Hong G. Im - King Abdullah University of Science & Technology
- Emre Cenker - Saudi Aramco
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
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Gussak , L.A. , Karpov , V.P. , and Tikhonov , Y.V. 1980
- Muller , M. , et al. 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