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A Fundamental Study on Combustion Characteristics in a Pre-Chamber Type Lean Burn Natural Gas Engine
Technical Paper
2019-24-0123
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Pre-chamber spark ignition technology can stabilize combustion and improve thermal efficiency of lean burn natural gas engines. During compression stroke, a homogeneous lean mixture is introduced into pre-chamber, which separates spark plug electrodes from turbulent flow field. After the pre-chamber mixture is ignited, the burnt jet gas is discharged through multi-hole nozzles which promotes combustion of the lean mixture in the main chamber due to turbulence caused by high speed jet and multi-points ignition. However, details mechanism in the process has not been elucidated.
To design the pre-chamber geometry and to achieve stable combustion under the lean condition for such engines, it is important to understand the fundamental aspects of the combustion process. In this study, a high-speed video camera with a 306 nm band-pass filer and an image intensifier is used to visualize OH* self-luminosity in rapid compression-expansion machine experiment. The results show that the OH* self-luminosity is observed in outer edge of the jet, while the luminosity in the jet temporarily weakens because the turbulent jet is exposed to low temperature surrounding in the main chamber. After that, the OH* luminosity is spontaneously increased near the wall due to auto-ignition when the gas temperature increases. In order capture this self-luminosity in multi-dimensional simulation, OH* formation and deactivation reactions are introduced into a commercial 3D-CFD code coupled with detailed chemistry to compare the measured images with the simulated ones. As a result, the OH* self-luminous distributions obtained by the 3D-CFD calculation have reasonable agreement with the measurement showing fundamental understanding on chemical reaction, heat release and temperature distribution of the jet.
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Authors
- Masashi Tanamura - Waseda University
- Shintaro Nakai - Waseda University
- Mahoko Nakatsuka - Waseda University
- Shota Taki - Waseda University
- Kohei Ozawa - Waseda University
- Beini Zhou - Waseda University
- Ratnak Sok - Waseda University
- Yasuhiro Daisho - Waseda University
- Jin Kusaka - Waseda University
Topic
Citation
Tanamura, M., Nakai, S., Nakatsuka, M., Taki, S. et al., "A Fundamental Study on Combustion Characteristics in a Pre-Chamber Type Lean Burn Natural Gas Engine," SAE Technical Paper 2019-24-0123, 2019, https://doi.org/10.4271/2019-24-0123.Data Sets - Support Documents
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References
- Ratnak , S. , Kusaka , J. , Daisho , Y. , Yoshimura , K. et al. Experiments and Simulations of a Lean-Boost Spark Ignition Engine for Thermal Efficiency Improvement SAE Int. J. Engines 9 1 379 396 2016
- Nakano , H. , Kobayashi , S. , Sako , T. , Nishimura , K. , and Ishiyama , T. Research on Effect of Sub-Chamber in Natural Gas Lean-Burn Engine 2015 JSAE Annual Congress (Autumn) July 2016
- Nakano , H. , Kobayashi , S. , Nada , Y. , and Kidoguchi , Y. Research on Achievement of Both Heat Efficiency Enhancement and NOx Reduction in Natural Gas Lean-Burn Engine (First Report) 2016 JSAE Annual Congress (Autumn) Proceedings 858 863
- Nakano , H. , Kobayashi , S. , Nada , Y. , and Kidoguchi , Y. Research on Achievement of both Heat Efficiency Enhancement and NOx Reduction in Natural Gas Lean-Burn Engine (Second Report) 2016 JSAE Annual Congress (Autumn) Proceedings 864 869
- Yamashita , Y. , Nada , Y. , Kidoguchi , Y. , Kaya , R. , Nakano , H. , and Kobayashi , S. Penetration of Burned Gas Jets Issued from a Combustion Sub-Chamber of a Lean-Burn Natural Gas Engine Internal Combustion Engine Symposium 71 2017
- Tanamura , M. , Seki , N. , Murakawa , S. , Kikusato , A. , Daisho , Y. , and Kusaka , J. A Study on Combustion Characteristics of a Pre-Chamber Natural Gas Engine Using a Rapid Compression and Expansion Machine Internal Combustion Engine Symposium 73 2017
- Gentz , G. , Thelen , B. , Gholamisheeri , M. , Litke , P. et al. A Study of the Influence of Orifice Diameter on a Turbulent Jet Ignition System through Combustion Visualization and Performance Characterization in a Rapid Compression Machine Applied Thermal Engineering 81 399 411 2015
- Gholamisheeri , M. , Thelen , B.C. , Gentz , G.R. , Wichman , I.S. , and Toulson , E. Rapid Compression Machine Study of a Premixed, Variable Inlet Density and Flow Rate, Confined Turbulent Jet Combustion and Flame 169 321 332 2016
- Hokimoto , S. , Kuboyama , T. , Moriyoshi , Y. , and Yamada , T. Combustion Analysis in a Natural Gas Engine with Pre-Chamber by Three-Dimensional Numerical Simulation Transactions of the JSME 81 830 2015
- Seo , T. , Akamatsu , F. , Shibahara , M. , and Katsuki , M. An Approach to Combustion Diagnostics of Premixes Flame by Chemiluminescence of OH* and CH* Journal of the Combustion Society of Japan 48 144 206 213 2006
- https://www.nacinc.com/pdf.php?pdf=/datasheets/UVi1850Series.pdf
- Convergent Science, Inc. 2018
- Bedford , K.W. and Yeo , W.K. Conjunctive Filtering Procedures in Surface Water Flow and Transport Galperin B. , Orszag S. Large Eddy Simulation of Complex Engineering and Geophysical Flows eds Cambridge University Press 1993
- Pomraning , E. 2000
- Serauskas Bob http://combustion.berkeley.edu/gri-mech/version30/text30.html
- Peters , N. Turbulent Combustion Cambridge University Press 2000
- Ewald , J. and Peters , N. A Level Set Based Flamelet Model for the Prediction of Combustion in Spark Ignition Engines 15th International Multidimensional Engine Modeling Users Group Meeting Detroit, MI, United States 2005
- Gulder , O.L. Correlations of Laminar Combustion Data for Alternative S.I. Engine Fuels SAE Technical Paper 841000 1984 10.4271/841000
- Launder , B. and Spalding , D. The Numerical Computation of Turbulent Flows Computer Methods in Applied Mechanics and Engineering 3 2 269 289 1974 10.1016/0045-7825(74)90029-2
- Cebeci , T. and Cousteix , J. Modeling and Computation of Boundary-Layer Flows Horizons Publishing Inc 2005
- Amsden , A.A. 1997
- Zhou , B. , Adachi , T. , Kusaka , J. , and Aizawa , T. A Numerical Study on Correlation of Chemiluminescent Species and Heat Release Distributions Using Large Eddy Simulation SAE Technical Paper 2018-32-0066 2018 10.4271/2018-32-0066
- Kathrotia , T. , Fikri , M. , Bozkurt , M. , Hartmann , M. et al. Study of the H + O + M Reaction Forming OH *: Kinetics of OH * Chemiluminescence in Hydrogen Combustion Systems Combustion and Flame 157 1261 1273 2010
- Kathrotia , T. , Riedel , U. , Seipel , A. , Moshammer , K. , and Brockhinke , A. Experimental and Numerical Study of Chemiluminescent Species I Low-Pressure Flames Applied Physics B Lasers and Optics Springer 2012