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NOx Reduction in Natural Gas RI Augmented Large Bore Four-Stroke SI Engines
Technical Paper
2011-26-0005
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SIAT 2011
Language:
English
Abstract
A preliminary study is made of the effectiveness of internally generated “Radical Ignition (RI) species” for NOx reduction in a NG (natural gas) Spark-Ignition (SI) 4-stroke test engine operating under lean fuel conditions at a typical SI compression ratio. The study includes both experimental and simulation analysis components. Investigated in this study is the potential for augmenting SI using a controlled presence of these RI species. The aim of their use is to lower the heat required for flame propagation under leaner than otherwise attainable fuel conditions. This lowers the NOx production. The primary generating site for these species is a set of passive mini-chambers located within the cylinder head. A modified single cylinder SI engine is used for the experimental studies. The simulation involves the chemical-kinetics of 32 species and 97 chemical reactions: solved simultaneously within the mini and main chambers as these chambers interact with each other, with the engine housing and with the manifold (exchanging energy, momentum, mass and chemical species). The study suggests that significant NOx reductions can be accomplished.
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Citation
Blank, D., "NOx Reduction in Natural Gas RI Augmented Large Bore Four-Stroke SI Engines," SAE Technical Paper 2011-26-0005, 2011, https://doi.org/10.4271/2011-26-0005.Also In
References
- Blank, D A “CNG/Methane-Combustion in Homogeneous-Combustion Radical-Ignition D.I. Diesel Engines” SAE Paper No. 2007-01-0047 2007
- Blank, D A Pouring, A A Lu, J “Methanol Combustion in Low Compression Ratio DI Engines Enabled by Sonex Piston Design” SAE Paper No. 2001-01-1197 2001
- Blank, D A “CNG/Methane-Combustion Kinetics (without N2) and Frozen Equilibrium in Radical-Initiated Low Compression Ratio D.I. Diesel Engines Using Pistons with Micro-Chambers” SAE Paper No. 2004-01-1677 2004
- Blank, D A Pouring, A A “Radical Controlled Autoignition at Reduced Compression Ratios in a Hydrogen D.I. Diesel Engine with Piston Micro-Chambers” SAE Paper No. 2004-1846 2004
- Blank, D A “Lean Combustion Chemical-Kinetics Studies of and Ethanol Four-Stroke Radical-Ignition DI-Engine” SAE Paper No. 2007-01-0623 2007
- Biruduganti, M Gupta, S et. al. “Air Separation Membranes - an Alternative to EGR in large Bore Natural Gas Engines” ICES2009-76054 2009
- Biruduganti, M Gupta, S Sekar, R “Low Temperature Combustion Using Nitrogen Enrichment to Mitigate NOx From Large Bore Natural Gas-Fueled Engines” ASME ICES 2008-116 2008
- Heywood, John B “Internal Combustion Engine Fundamentals” McGraw-Hill New York 1988
- Blank, D A “Radical Controlled Autoignition in an HCRI Hydrogen DI Four-Stroke Diesel Engine with Reduced Heat Rejection” SAE Paper No. 2007-01-0013 2007
- Blank, D A “Hydrogen Lean-Combustion Studies in a Four-Stroke DI Radical-Ignition Diesel Engine with EGR” SAE Paper No. 2007-01-1887 and JSAE Paper 20077212 2007
- Kee, R J Rupley, F M Miller, J A “CHEMKIN-II: A Fortran Chemical Kinetics Package for the Analysis of Gas-Phase Chemical Kinetics” Sandia National Lab Report. SAND89-80098, UC-706 Nov. 1991
- https://trac.hpc.usu.edu/projects/hauserlab/browser/thauser/Programs/OpenFOAM-1.2/applications/test/readCHEMKINIII/CHEMKINdata/chem.inp_c8h18_egr
- Arora, R C Blank, D A et. al. “Development of a Software to Simulate the In-cylinder Processes in a Diesel Engine” IIT Kharagpur Dept. of Mechanical Engineering Phase I Report 1998
- Blank, D A Pouring, A A “Frozen Equilibrium and EGR Effects on Radical-Initiated H2 Combustion Kinetics in Low-Compression D.I. Engines Using Pistons with Micro-Chambers” JSAE Paper 2003-0306 and SAE Paper No. 2003-01-1788 2003
- Blank, D A Shih, T M “Hypergolic Combustion Model for Four-Stroke Heat Barrier Piston Engines,” Numerical Heat Transfer, Part A 17 1 28 Washington. D.C. 1990
- Petukhov, B S “Heat Transfer and Friction in Turbulent Pipe Flow with Variable Physical Properties” Advances in Heat Transfer Harnett, J.P. Irvine, T.F. Academic Press New York 504 564 1970
- Holman, J P “Heat Transfer, Fifth Edition” McGraw-Hill Book Co. New York 1981
- Ramos, J I “Axisymmetric Flow Model in a Piston-Cylinder Arrangement with Detailed Analysis of the Valve Region” SAE Paper No. 800286 1980
- Ferguson, Colin R “Internal Combustion Engines” Applied Thermosciences John Wiley and Sons, Inc. New York 1986