This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Mixing Enhancement by a Bump Ring in a Combustion Chamber for Compound Combustion
Technical Paper
2005-01-3721
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Engine experiments have shown that simultaneous reductions of NOx and soot emissions can be achieved by the so called BUMP (Bump-up mixing process) combustion chamber. In order to understand the underlying mechanism of emission reduction, a STAR-CD based multi-dimensional combustion modeling was carried out for a heavy-duty diesel engine with the BUMP combustion chamber. The results from an impingement gas jet experiment were also presented and compared with computer modeling. The results showed that complex air motion with high turbulence was obtained by adoption of the bump ring. The fuel/air mixing rate was promoted greatly. Therefore, for the BUMP combustion chamber, much fuel fell in the optimum equivalence ratio range than that of the baseline chamber. The computations also indicated that the whole combustion process in the BUMP combustion chamber may be classified as premixed combustion and typical spray diffusion combustion, and the premixed combustion may be divided into three stages due to stratification in temperatures of corresponding stratified fuel. The lean mixture above criteria temperature (800K ) auto-ignited first and triggered the combustion of mixture of around stoichiometric equivalence ratio, and then the mixture in fuel/air equivalence range of 1.25 to 1.67 burnt, which was originally with the lowest temperature in the stratification. The mechanism for simultaneous reduction of soot and NO emissions with the BUMP combustion chamber was attributed to the increase in fuel proportion in the range of optimum equivalence ratio and lean mixture.
Recommended Content
| Technical Paper | Modeling of Diesel Engine Operation |
| Technical Paper | Planar Fluorescence Technique for Visualization of a Diesel Spray |
| Technical Paper | Simulation of Diesel Engines Cold-Start |
Authors
Topic
Citation
Su, W. and Zhang, X., "Mixing Enhancement by a Bump Ring in a Combustion Chamber for Compound Combustion," SAE Technical Paper 2005-01-3721, 2005, https://doi.org/10.4271/2005-01-3721.Also In
References
- Turns S. R. An Introduction to Combustion - Concepts and Applications Second McGraw-Hill Boston 1999
- Heywood J. B. Internal Combustion Engines Fundamentals McGraw-Hill 1988
- Stanglmaier R. H. Roberts C. E. Homogeneous charge compression ignition (HCCI): benefits, compromises, and future engine applications SAE Paper 1999-01-3682 1999
- Zhao Fuquan (Frank) Asmus Thomas W. Assanis Dennis N. et al. Homogenous Charge Compression Ignition (HCCI) Engine: Key Research and Development Issues Society of Automotive Engineers, Inc 2002
- Kaneko Naoya Ando Hirokazu Ogawa Hideyuki Miyamoto Noboru Expansion of the Operating Range with in-Cylinder Water Injection in a Premixed Charge Compression Ignition Engine SAE paper 2002-01-1743 2002
- Nishijima Yoshiaki Asaumi Yasuo Aoyagi Yuzo Premixed Lean Diesel Combustion (PREDIC) Using Impingement Spray System SAE paper 2001-01-1892 2001
- Iwabuchi Yoshinori Kawai Kenji Shoji Takeshi Takeda Yoshinaka Trial of New Concept Diesel Combustion System - Premixed Compression-ignition Combustion 1999
- Helmantel A. Denbratt I. HCCI Operation of a Passenger Car Common Rail DI Diesel Engine with Early Injection of conventional Diesel Fuel SAE paper 2004-01-0935 2004
- Hashizume Takeshi Miyamoto Takeshi Akagawa Hisashi Tsujimura Kinji Combustion and Emission Characteristics of Multiple-Stage Diesel Combustion SAE Paper 980505 1998
- Walter Bruno Gatellier Bertrand Development of the High-Power NADI Concept Using Dual-Mode Diesel Combustion to Achieve Zero NOx and Particulate Emissions SAE paper 2002-01-1744 2002
- Hasegawa Ryo Yanagihara Hiromichi HCCI Combustion in DI Diesel Engine SAE Paper 2003-01-0745 2003
- Yiqiang Pei Wanhua Su Tiejian Lin The BUMP Combustion Chamber Presented Based on the Concept of Lean Diffusion Combustion in a D.I. Diesel Engine with Common Rail Fuel Injector Transactions of CSICE 20 5 381 386 2002
- Tiejian Lin Wanhua Su Yiqiang Pei A New HCCI Combustion Technology in a DI Diesel Engine Based on Compound Control of Multi-Pulse Fuel Injection and the BUMP Combustion Chamber Transactions of CSICE 20 6 475 480 2002
- Su Wanhua Lin Tiejian Pei Yiqiang A Compound Technology for HCCI Combustion in a DI Diesel Engine Based on the Multi-Pulse Injection and the BUMP Combustion Chamber SAE Paper 2003-01-0741 2003
- Su Wanhua Wang Hui Liu Bin Injection Mode Modulation for HCCI Diesel Combustion SAE Paper 2005-01-0117 2005
- Su Wanhua Zhang Xiaoyu Lin Tiejian Pei Yiqiang Zhao Hua Study of Pulse Spray, Heat Release, Emissions and Efficiencies in a Compound Diesel HCCI Combustion Engine Proceedings of ASME-ICE October 24-27 Long Beach, USA 2004
- Han Z. Reitz R. D. Turbulence Modeling of Internal Combustion Engines Using RNG k-ε Models Combustion Science and Technology 106 4-6 267 295 1995
- Kong S. C. Han Z. Reitz R. D. The Development and Application of Diesel Ignition and Combustion Model for Multi-Dimensional Engine Simulation SAE paper 950278 1995
- Huh K. Y. Gosman A. D. A Phenomenological Model of Diesel Spray Atomization Proceedings of the International Conference on Multiphase Flows Sept. 24-27 Tsukuba, Japan 1991
- Reitz R. D. Diwakar R. Effect of Drop Breakup on Fuel Sprays SAE paper 860469 1986
- Reitz R. D. Diwakar R. Structure of High Pressure Fuel Sprays SAE paper 870598 1987
- Bai C. Gosman A. D. Development of Methodology for Spray Impingement Simulation SAE paper 950283 1995
- STAR-CD Methodology CD Adapco Group 2001
- Halstead M. P. Kirsch L. J. Prothero A. Quinn C. P. A Mathematical Model for Hydrocarbon Autoignition at High Pressures Proc. R. Soc. Lond. A346 515 538 1975
- Halstead M. P. Kirsch L. J. Quinn C. P. The Autoignition of Hydrocarbon Fuels at High Temperatures and Pressures - Fitting a Mathematical Model Combust. Flame 30 45 60 1977
- Patterson M. A. Kong S. C. Hampson G. J. Reitz R. D. Modeling the Effects of fuel Injection Characteristics on Diesel Engine Soot and NOx Emissions SAE Paper 940523 1994
- Su Wanhua Wang Yang Lin Tiejian Xie Hui Pei Yiqiang Li Shaoan Cheng Gang Wang Xiaobo A Study of Effects of Design Parameters on Transient Response and Injection Rate Shaping for a Common Rail Injector System SAE paper 2001-01-3506 2001
- Yiqiang Pei A Study on the Mixture Formation and Combustion in the BUMP Combustion Chamber of MULINBUMP Combustion System Tianjin: Tianjin University 2004
- Gonzalez M. A. Lian Z. W. Reitz R. D. Modeling Diesel Engine Spray Vaporization and Combustion SAE Paper 920579 1992
- Abraham J. What is Adequate Resolution in the Numerical Computation of Transient Jets? SAE Paper 970051 1997
- Kidoguchi Y. Sanda M. Miwa K. Experimental and Theoretical Optimization of Combustion Chamber and Fuel Distribution for the Low Emission Direct-Injection Diesel Engine J. Eng. Gas Turbines Power 125 1 351 357 2003
- Su W. H. Lin R. W. Enhancement of Near Wall Mixing of an Impinging Jet by Means Bump on the Wall SAE Paper 971616 1997
- Su W. H. Xie H. Lin R. W. et al. Experimental Study on the Effects of Spray Impingement and Turbulence Structure on Spray Mixing Rate by Gas Jet Simulation SAE Paper 960775 1996
- Jones W. P. Whitelaw J. H. Calculation Methods for Reacting Turbulent Flows: A Review Combust. Flame 48 1 1982
- Pischinger F. Schulte H. Jansen J. Fundamentals and Trends of Development for Diesel Combustion Systems VDI Berichte No. 174 61 93 1998
- Bohm L Hesse D. Jander H. Wagner H. G. G. 22 th International Symposium on Combustion The Combustion Institute Pittsburgh, PA 401 1989
- Wanhua Su Haozhong Huang A New Reduced Chemical Kinetic Model of n-heptane for HCCI Engine Combustion SAE Paper 2005-01-0118 2005