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Experimental and Numerical Study on Emission in an HCCI Engine Operated with Neat Dimethyl Ether
Technical Paper
2007-01-1888
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents a new detailed chemical kinetic model for dimethyl ether (DME) combustion that consists of 97 species and 457 elementary reactions. Simulation results with this model were compared with experimental DME ignition data and good agreement was obtained.
A new reduced chemical kinetic model for DME involving 36 species and 73 reactions is proposed to improve prediction capabilities of the kinetics models and to identify key reactions and important species for Homogenous Charge Compression Ignition (HCCI) engine applications. Results from this model adequately predict observed results. The kinetic model using this reduced chemical kinetic mechanism includes three sub-models: a low temperature and negative temperature coefficient region sub-model, a pyrolysis and oxidation sub-model for high temperature, and a sub-model for oxides of nitrogen (NOX). The simplified chemical kinetic model correlates well with the thermodynamic model and can be used to simulate combustion process of DME as well as formation of formaldehyde (CH2O), formic acid (HCO2H) and NOX in HCCI engines, and calculated results also agree well with those from the new detailed model.
In order to gain further insights of CH2O and HCO2H formation, the kinetic model was coupled with CFD software FLUENT to predict the combustion and exhaust emissions of DME from the start of compression to the end of the expansion process. The results indicate that the latter part of the expansion process significantly influences engine-out formaldehyde, and high concentration areas of partial oxidation products of CH2O and HCO2H were found in the flame quenching layer and piston crevices. Comparisons between calculated and experimental results show that the present simulation methodology is capable of predicting unconventional hydrocarbon emissions of a HCCI engine fueled with DME.
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Authors
- Mo Chun-lan - College of Energy and Power Engineering, Huazhong Univ. of Sci. and Tech., China
- Zhang Yu-sheng - College of Energy and Power Engineering, Huazhong Univ. of Sci. and Tech., China
- Shi Yu - College of Energy and Power Engineering, Huazhong Univ. of Sci. and Tech., China
- Han Jian - College of Energy and Power Engineering, Huazhong Univ. of Sci. and Tech., China
- Sun Hai-ying - College of Energy and Power Engineering, Huazhong Univ. of Sci. and Tech., China
Topic
Citation
Chun-lan, M., Yu-sheng, Z., Yu, S., Jian, H. et al., "Experimental and Numerical Study on Emission in an HCCI Engine Operated with Neat Dimethyl Ether," SAE Technical Paper 2007-01-1888, 2007, https://doi.org/10.4271/2007-01-1888.Also In
References
- Onishi S Hong lo S Shoda K Do Jo P Kato S “Active thermal atmosphere combustion (ATAC ) - A new combustion process for internal combustion engines,” SAE paper No. 790501 1979
- Christensen, M. Johansson, B. Amnéus, P. Mauss, F. “Supercharged Homogeneous Charge Compression Ignition,” SAE Paper No. 980787 1998
- Christensen, M. Johansson, B. “Influence of Mixture Quality on Homogeneous Charge Compression Ignition,” SAE paper No. 982454 1998
- Najt P M Foster D E “Compression-ignited Homogene-ous Charge Combustion,” SAE Paper No. 830264 1983
- Igarashi T Iida N Auto Ignition and Combustion of DME and n-Butane/Air Mixtures in Homogeneous-Charge Compression Ignition Engine[J] Proceedings of Japan Society of Mechanical Engineers(JSME) 1998
- Thring R H. Homogeneous Charge Compression Ignition(HCCI) Engine[J] SAE Paper 892068
- Shudo T Ono Y Takahashi T. Ignition Control by DME Reformed Gas in HCCI Combustion of DME[J] SAE paper 2002-01-2828 2002
- Golovitchev V I Nordin N Chomiak J Neat Dimethyl Ether: Is It Really Diesel Fuel of Promise[J]? SAE Paper 982537
- Zhang Y S Chang H B Zhang Y J. A Study on DME-the New Clean Alternative Fuel for Diesel Engines[J] Journal of Chinese IC Engine Engineering 22 1 17 22 2001
- Fleisch, T. McCarthy, C. Basu, A. Udovich, C. Char bonneau, P. Slodowske, W. “A New Clean Diesel Technology: Demonstration of ULEV Emission on a Navistar Diesel Engine Fueled with Dimethyl Ether,” SAE Paper No. 950061 1995
- KONNO Mitsuru CHEN Zhili MIKI Kentaro “Computational and Experimental Study on the Influence of Formaldehyde on HCCI Combustion Fueled with Dimethyl Ether,” SAE paper No. 2003-01-1826 2003
- Yun Zhong Xinqi Qiao Degang Li Zhen Huang Maji Luo Experimental and Numerical Simulation Study on HCCI Combustion in DME Engine[J] Vehicle Engine 2005 156 10 12
- Tiegang HU Longbao ZHOU Shenghua LIU Wei Li Study of DME HCCI Engine Emission Characteristic with Different Compression Ratios[J] Journal of Chinese IC Engine Engineering 2005 26 5 10 13
- Dagaut P Boettner J C Cathonnet M. Twenty-Sixth Symposium (International) on Combustion. The Combustion Institute Pittsburgh 1996 627 632
- Curran H J Pitz W J Westbrook C K Dagaut P Boettner J C Cathonnet M A wide range modeling study of dimethyl ether oxidation[J] International Journal of Chemical Kinetics 1998 30 3 229 241
- Curran H J Fischer S L Dryer F L The reaction kinetics of dimethyl ether. II: Low temperature oxidation in flow reactors[J] International Journal of Chemical Kinetics 2000 32 12 741 759
- Kim H G Cho S W Min K D “Reduced Chemical Kinetic Model of DME for HCCI Combustion,” SAE Paper No. 2003-01-1822 2003
- Yamada H Sakanashi H Choi N Tezaki A “Simplified Oxidation Mechanism of DME Applicable for Compression Ignition,” SAE Paper No. 2003-01-1819 2003
- Marinov N Pitz W Westbrook C Hori M Matsunaga N An Experimental and Kinetic Calculation of the Promotion Effect of Hydrocarbons on the NO-NO2 Conversion in a Flow Reactor[C] Proceedings of the Combustion Institute 1998 27 389 396
- Curran H J Fischer S L Dryer F L The Reaction Kinetics of Dimethyl Ether. II: Low Temperature Oxidation in Flow Reactors[J] International Journal of Chemical Kinetics 32 12 Dec 2000
- Fischer S L Dryer F L Curran H J The Reaction Kinetics of Dimethyl Ether. I: High Temperature Pyrolysis and Oxidation in Flow Reactors[J] International Journal of Chemical Kinetics 32 12 Dec 2000
- Liu I Cant N W Bromly J H Barnes F J Nelson P F Haynes B S Formate species in the low-temperature oxidation Chemo sphere 42 2001 583 589