This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental Study of Ignition and Combustion Characteristics of a Diesel Pilot Spray in a Lean Premixed Methane/Air Charge using a Rapid Compression Expansion Machine
Technical Paper
2012-01-0825
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The behavior of spray auto-ignition and combustion of a diesel
spray in a lean premixed methane/air charge was investigated. A
rapid compression expansion machine with a free-floating piston was
employed to reach engine-relevant conditions at start of injection
of the micro diesel pilot. The methane content in the lean ambient
gas mixture was varied by injecting different amounts of methane
directly into the combustion chamber, the ambient equivalence ratio
for the methane content ranged from 0.0 (pure air) to 0.65. Two
different nozzle tips with three and six orifices were employed.
The amount of pilot fuel injected ranged between 0.8 and 1.8
percent of the total energy in the combustion chamber. Filtered OH
chemiluminescence images of the combustion were taken with a
UV-intensified high-speed camera through the optical access in the
piston. Filtered photomultiplier signals of the total emitted light
for OH, CH and C₂ radicals as well as the pressure signal were
simultaneously recorded and the effect of methane content and
nozzle geometry on ignition locations, ignition timing and
combustion behavior was analyzed.
It was seen, that higher values of the equivalence ratio promote
propagation of the premixed flame as expected, but delay the
autoignition of the pilot spray considerably. Furthermore, it was
observed that even for very low equivalence ratios, substantial
heat release occurs around the spray in the premixed charge,
although no flame propagation in the classic sense can be
sustained. For the whole range of equivalence ratios, the use of
the six-hole injector was seen to considerably assist conversion of
the entire premixed charge.
Recommended Content
Authors
Citation
Schlatter, S., Schneider, B., Wright, Y., and Boulouchos, K., "Experimental Study of Ignition and Combustion Characteristics of a Diesel Pilot Spray in a Lean Premixed Methane/Air Charge using a Rapid Compression Expansion Machine," SAE Technical Paper 2012-01-0825, 2012, https://doi.org/10.4271/2012-01-0825.Also In
References
- Abd Alla, G.H. Badr, O.A. Soliman, H.A. Abd Rabbo, M.F. “Exhaust emissions from an indirect injection dual-fuel engine,” Proc. Inst. Mech Eng. 214 3 333 340 2000 10.1243/0954407001527457
- Papagiannakis, R.G. Hountalas, D.T. “Experimental Investigation of Natural Gas Percentage on Performance and Emissions of a D.I. Dual Fuel Engine,” Appl. Therm. Ens. 23 3 353 365 2003 10.1016/S1359-4311(02)00187-4
- Krishnan, S.R. Biruduganti, M. Bell, S.R. Midkiff, K.C. “Performance and heat release analysis of a pilot-ignited natural gas engine,” Int. J. Engine Research 3 3 171 184 2002 10.1243/14680870260189280
- Krishnan, S.R. Srinivasan, K.K. Singh, S. Bell, S.R. Midkiff, K.C. “Strategies for Reduced NOx Emissions in Pilot-Ignited Natural Gas Engines,” Journal of Engineering for Gas Turbines and Power 126 3 665 671 2004 10.1115/1.1760530
- Abd Alla, G.H. Soliman, H.A. Badr, O.A. Abd Rabbo, M.F. “Effect of pilot quantity on the performance of a dual fuel engine,” Energy Conversion & Management 41 6 559 572 2000 10.1016/S0196-8904(99)00124-7
- lida, N. Nakamura, M. Ohashi, H. “Study of Diesel Spray Combustion in An Ambient Gas Containing Hydrocarbon Using a Rapid Compression Machine,” SAE Technical Paper 970899 1997 10.4271/970899
- Lee, J.H. Iida, N. “Combustion of diesel spray injected into reacting atmosphere of propane-air homogenous mixture,” Int. J. Engine Research 2 1 69 80 2001 10.1243/1468087011545352
- Saito, H. Sakurai, T. Sakonji, T. Hirashima, T. et al. “Study on Lean Burn Gas Engine Using Pilot Oil as the Ignition Source,” SAE Technical Paper 2001-01-0143 2001 10.4271/2001-01-0143
- Carlucci, A. Laforgia, D. Saracino, R. Toto, G. “Study of Combustion Development in Methane-Diesel Dual Fuel Engines, Based on the Analysis of In-Cylinder Luminance,” SAE Technical Paper 2010-01-1297 2010 10.4271/2010-01-1297
- Karim, G.A. “A Review of Combustion Processes in the Dual Fuel Engine-the Gas Diesel Engine,” Prog. Energy Combust. Sci. 6 3 277 285 1980 10.1016/0360-1285(80)90019-2
- Liu, Z. Karim, G. A. “Simulation of combustion processes in gas-fuelled diesel engines,” Proc. Inst. Mech. Eng. Part A, Journal of Power and Energy 211 2 159 169 1997 10.1243/0957650971537079
- Karim, G.A. “Combustion in Gas Fueled Compression: Ignition Engines of the Dual Fuel Type,” Journal of Engineering for Gas turbines and Power 125 3 827 836 2003 10.1115/1.1581894
- Escher, A. Kirchen, P. Boulouchos, K. “Experimental investigations using a transparent single shot compression machine for HCCI - combustion,” SAE Technical Paper 2007-24-0009 2007 10.4271/2007-24-0009
- Testem, Technical Manual TeRCM-K48 2004 Rapid Compression Machine for in-cylinder spray development and combustion processes analysis. Testem - Gesellschaft für Mess- und Datentechnik GmbH, Hoflach No. 5, D-82239 Hoflach/Alling
- Gerke, U. “Numerical Analysis of Mixture Formation and Combustion in a Hydrogen Direct-Injection Internal Combustion Engine,” Ph.D. thesis 17477 Department of Mechanical and Process Engineering, Federal Institute of Technology Zurich Zurich 2007
- Walther, H.Ph. Wachtmeister, G. “Phenomenological Combustion Model for Lean Burning Gas Engines with Pilot Injection,” Proceedings of the 7 th Dessauer Gas Engine Conference 2011 255 274
- Wright, Y.M. Margari, O.-N. Boulouchos, K. De Paola, G. Mastorakos, E. “Experiments and Simulations of n-Heptane Spray Auto-Ignition in a Closed Combustion Chamber at Diesel Engine Conditions,” Flow Turbulence Combust 84 1 49 78 2010 10.1007/s10494-009-9224-0
- Walther, H.Ph. Schlatter, S. Wachtmeister, G. Boulouchos, K. “Combustion Models for Lean-Burn Gas Engines with Pilot Injection,” Motortechnische Zeitschrift (MTZ 2/12) 2012
- Mastorakos, E. Baritaud, T.A. Poinsot, T.J. “Numerical simulations of autoignition in turbulent mixing flows,” Combustion and Flame 109 1-2 198 223 1997 10.1016/S0010-2180(96)00149-6
- Mancaruso, E. Merola, S. Vaglieco, B. “Extinction and Chemiluminescence Measurements in CR DI Diesel Engine Operating in HCCI Mode,” SAE Technical Paper 2007-01-0192 2007 10.4271/2007-01-0192