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Comparison of the Lift-Off Lengths Obtained by Simultaneous OH-LIF and OH* Chemiluminescence Imaging in an Optical Heavy-Duty Diesel Engine
Technical Paper
2015-24-2418
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The presence of OH radicals as a marker of the high temperature reaction region usually has been used to determine the lift-off length (LOL) in diesel engines. Both OH Laser Induced Fluorescence (LIF) and OH* chemiluminescence diagnostics have been widely used in optical engines for measuring the LOL. OH* chemiluminescence is radiation from OH being formed in the exited states (OH*). As a consequence OH* chemiluminescence imaging provides line-of-sight information across the imaged volume. In contrast, OH-LIF provides information on the distribution of radicals present in the energy ground state. The OH-LIF images only show OH distribution in the thin cross-section illuminated by the laser. When both these techniques have been applied in earlier work, it has often been reported that the chemiluminescence measurements result in shorter lift-off lengths than the LIF approach. In order to investigate this discrepancy this work presents a dedicated comparison of the LOL obtained from these two diagnostic techniques. In diesel engines, the cycle-to-cycle variations in lift-off region are usually significant. To avoid misinterpretations caused by these variations simultaneous measurements are needed. The statistical analysis based on our simultaneous data can conclude that the OH-LIF method yields longer LOL than the OH* chemiluminescence method by a smaller sample size and more precisely than non-simultaneous data. This can be partially explained by the 3D geometry and flame axis asymmetry effects. A numerical simulation with OH and OH* distribution was performed for the comparison. It shows a great agreement with the experimental results in this study.
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Citation
Li, Z., Yu, X., Lequien, G., Lind, T. et al., "Comparison of the Lift-Off Lengths Obtained by Simultaneous OH-LIF and OH* Chemiluminescence Imaging in an Optical Heavy-Duty Diesel Engine," SAE Technical Paper 2015-24-2418, 2015, https://doi.org/10.4271/2015-24-2418.Also In
References
- Higgins , B. and Siebers , D. Measurement of the Flame Lift-Off Location on DI Diesel Sprays Using OH Chemiluminescence SAE Technical Paper 2001-01-0918 2001 10.4271/2001-01-0918
- Siebers , D. and Higgins , B. Flame Lift-Off on Direct-Injection Diesel Sprays Under Quiescent Conditions SAE Technical Paper 2001-01-0530 2001 10.4271/2001-01-0530
- Pickett , L. , Siebers , D. , and Idicheria , C. Relationship Between Ignition Processes and the Lift-Off Length of Diesel Fuel Jets SAE Technical Paper 2005-01-3843 2005 10.4271/2005-01-3843
- Idicheria , C. and Pickett , L. Formaldehyde Visualization Near Lift-off Location in a Diesel Jet SAE Technical Paper 2006-01-3434 2006 10.4271/2006-01-3434
- Larsson , A. Optical Studies in a DI Diesel Engine SAE Technical Paper 1999-01-3650 1999 10.4271/1999-01-3650
- Musculus , M. Effects of the In-Cylinder Environment on Diffusion Flame Lift-Off in a DI Diesel Engine SAE Technical Paper 2003-01-0074 2003 10.4271/2003-01-0074
- Gaydon , A.G. The spectroscopy of Flames Chapman and Hall Ltd. London 1974
- Kopp , M. , Brower M. , Mathieu O. et al. CO2 chemiluminescence study at low and elevated pressures Applied Physics B107 3 529 538 2012 10.1007/s00340-012-5051-4
- Lequien , G. , Li , Z. , Andersson , O. , and Richter , M. Lift-Off Length in an Optical Heavy-Duty Diesel Engine SAE Int. J. Engines 8 2 635 646 2015 10.4271/2015-01-0793
- Eckbreth , A.C. Laser diagnostics for combustion temperature and species Second 1996
- Singh , S. , Musculus , Mark P. B. , Reitz , R.D. Mixing and flame structures inferred from OH-PLIF for conventional and low-temperature diesel engine combustion Combustion and Flame 156 10 1898 1908 2009 10.1016/j.combustflame.2009.07.019
- Zhao , H. Advanced direct injection combustion engine technologies and development 2 2010
- Carl , S.A. , Van Poppel , M. , and Peeters , J. Identification of the CH + O2 → OH(A) + CO Reaction as the Source of OH(A−X) Chemiluminescence in C2H2/O/H/O2 Atomic Flames and Determination of Its Absolute Rate Constant over the Range T = 296 to 511 K The Journal of Physical Chemistry A 107 50 11001 11007 2003 10.1021/jp035568j
- Smith , G.P. , Park , C. , and Luque , J. A note on chemiluminescence in low-pressure hydrogen and methane-nitrous oxide flames Combustion and Flame 140 4 385 389 2005 http://dx.doi.org/10.1016/j.combustflame.2004.11.011
- Tamura , M. , Berg , P.A. , Harrington , J.E. , Luque , J. et al. Collisional Quenching of CH(A), OH(A), and NO(A) in Low Pressure Hydrocarbon Flames Combustion and Flame 114 3-4 502 514 1998 http://dx.doi.org/10.1016/S0010-2180(97)00324-6
- Panoutsos , C.S. , Hardalupas , Y. , and Taylor , A.M.K.P. Numerical evaluation of equivalence ratio measurement using OH* and CH* chemiluminescence in premixed and non-premixed methane-air flames Combustion and Flame 156 2 273 291 2009 http://dx.doi.org/10.1016/j.combustflame.2008.11.008
- Hall , J.M. , and Petersen , E.L. An optimized kinetics model for OH chemiluminescence at high temperatures and atmospheric pressures International Journal of Chemical Kinetics 38 12 714 724 2006 10.1002/kin.20196
- Curran , H.J. , Gaffuri , P. , Pitz , W.J. , and Westbrook , C.K. A Comprehensive Modeling Study of n-Heptane Oxidation Combustion and Flame 114 1-2 149 177 1998 http://dx.doi.org/10.1016/S0010-2180(97)00282-4
- Liu , S. , Hewson , J.C. , Chen , J.H. , and Pitsch , H. Effects of strain rate on high-pressure nonpremixed n-heptane autoignition in counterflow Combustion and Flame 137 3 320 39 2004 10.1016/j.combustflame.2004.01.011
- Yakhot , V. , and Orszag , S. Renormalization group analysis of turbulence. I. Basic theory Journal of Scientific Computing 1 1 3 51 1986 10.1007/BF01061452
- Beale , J.C. , and Reitz , R.D. Modeling spray atomization with the Kelvin-Helmholtz/Rayleigh-Taylor hybrid model Automization and Sprays: Journal of the International Institutions for Liquid Atomization and Spray Systems 9 6 623 650 1999
- O'Rourke , P. and Amsden , A. The Tab Method for Numerical Calculation of Spray Droplet Breakup SAE Technical Paper 872089 1987 10.4271/872089
- Youngchul , R. and Reitz , R. D. A vaporization model for discrete multi-component fuel sprays International Journal of Multiphase Flow 35 2 101 17 2009 10.1016/j.ijmultiphaseflow.2008.10.006
- Kong , S. C. and Reitz , R. D. Use of detailed chemical kinetics to study HCCI engine combustion with consideration of turbulent mixing effects Journal of Engineering for Gas Turbines and Power 124 3 702 707 2002 10.1115/1.1413766
- Naber , J. and Reitz , R. Modeling Engine Spray/Wall Impingement SAE Technical Paper 880107 1988 10.4271/880107
- Chartier , C. , Aronsson , U. , Andersson , Ö. , Egnell , R. , Johansson , B. Influence of jet-jet interactions on the lift-off length in an optical heavy-duty DI diesel engine Fuel 112 311 318 2013 10.1016/j.fuel.2013.05.021
- Dec , J. A Conceptual Model of DI Diesel Combustion Based on Laser-Sheet Imaging* SAE Technical Paper 970873 1997 10.4271/970873
- Andersson , O. 2012 Experiment!: Planning, Implementing and interpreting John Wiley & Sons, Ltd.
- Musculus , M. , Dec , J. , and Tree , D. Effects of Fuel Parameters and Diffusion Flame Lift-Off on Soot Formation in a Heavy-Duty DI Diesel Engine SAE Technical Paper 2002-01-0889 2002 10.4271/2002-01-0889
- Zaman , K. B. M. Q. and Foss , J. K. The effect of vortex generators on a jet in a cross-flow Physics of Fluids 9 1 106 14 1997 10.1063/1.869154
- Wang , H. , Araneo , L. , and Coghe , A. An Experimental Study of Gaseous Transverse Injection and Mixing Process in a Simulated Engine Intake Port SAE Int. J. Fuels Lubr. 6 1 11 23 2013 10.4271/2013-01-0561