A late-injection, high exhaust-gas recirculation rate, low-temperature combustion strategy is investigated in a heavy-duty diesel engine using a suite of optical diagnostics: chemiluminescence for visualization of ignition and combustion, laser Mie scattering for liquid-fuel imaging, planar laser-induced fluorescence (PLIF) for both OH and vapor-fuel imagings, and laser-induced incandescence for soot imaging. Fuel is injected at top dead center when the in-cylinder gases are hot and dense. Consequently, the maximum liquid-fuel penetration is 27 mm, which is short enough to avoid wall impingement. The cool flame starts 4.5 crank angle degrees (CAD) after the start of injection (ASI), midway between the injector and bowl rim, and likely helps fuel to vaporize. Within a few CAD, the cool-flame combustion reaches the bowl rim. A large premixed combustion occurs near 9 CAD ASI, close to the bowl rim. Soot is visible shortly afterward, along the walls, typically between two adjacent jets. OH PLIF indicates that premixed combustion first occurs within the jet and then spreads along the bowl rim in a thin layer, surrounding soot pockets at the start of the mixing-controlled combustion phase near 17 CAD ASI. During the mixing-controlled phase, soot is not fully oxidized and is still present near the bowl rim late in the cycle. At the end of combustion near 27 CAD ASI, averaged PLIF images indicate two separate zones. OH PLIF appears near the bowl rim, while broadband PLIF persists late in the cycle near the injector. The most likely source of broadband PLIF is unburned fuel, which indicates that the near-injector region is a potential source of unburned hydrocarbons.
Skip Nav Destination
Article navigation
Research Papers
Optical Diagnostics of Late-Injection Low-Temperature Combustion in a Heavy-Duty Diesel Engine
Thierry Lachaux,
Thierry Lachaux
Sandia National Laboratories
, P.O. 969, MS9053, Livermore, CA 94551
Search for other works by this author on:
Satbir Singh,
Satbir Singh
Powertrain Systems Research Laboratory,
General Motors Research and Development
, Warren, MI 48090
Search for other works by this author on:
Rolf D. Reitz
Rolf D. Reitz
Engine Research Center, Department of Mechanical Engineering,
The University of Wisconsin, Madison
, 1500 Engineering Drive, Madison, WI 53706
Search for other works by this author on:
Thierry Lachaux
Sandia National Laboratories
, P.O. 969, MS9053, Livermore, CA 94551
Mark P. B. Musculus
Satbir Singh
Powertrain Systems Research Laboratory,
General Motors Research and Development
, Warren, MI 48090
Rolf D. Reitz
Engine Research Center, Department of Mechanical Engineering,
The University of Wisconsin, Madison
, 1500 Engineering Drive, Madison, WI 53706J. Eng. Gas Turbines Power. May 2008, 130(3): 032808 (9 pages)
Published Online: April 2, 2008
Article history
Received:
October 23, 2007
Revised:
October 24, 2007
Published:
April 2, 2008
Citation
Lachaux, T., Musculus, M. P. B., Singh, S., and Reitz, R. D. (April 2, 2008). "Optical Diagnostics of Late-Injection Low-Temperature Combustion in a Heavy-Duty Diesel Engine." ASME. J. Eng. Gas Turbines Power. May 2008; 130(3): 032808. https://doi.org/10.1115/1.2830864
Download citation file:
Get Email Alerts
Cooling System of a High-Pressure Centrifugal Compressor: Development and Impact on Wheel Temperatures
J. Eng. Gas Turbines Power (May 2025)
Variable Cycle Engine Concepts and Component Technologies—An Overview
J. Eng. Gas Turbines Power (May 2025)
Numerical Analysis of a Two-Phase Turbine: A Comparative Study Between Barotropic and Mixture Models
J. Eng. Gas Turbines Power (May 2025)
A Comprehensive Literature Review on the Resolution of Turbine Engine Performances' Inverse Problems
J. Eng. Gas Turbines Power (May 2025)
Related Articles
Modeling Diesel Spray Flame Liftoff, Sooting Tendency, and NO x Emissions Using Detailed Chemistry With Phenomenological Soot Model
J. Eng. Gas Turbines Power (January,2007)
A Study of the Transition Between Lean Conventional Diesel Combustion and Lean, Premixed, Low-Temperature Diesel Combustion
J. Eng. Gas Turbines Power (September,2008)
Comparisons of Diesel PCCI Combustion Simulations Using a Representative Interactive Flamelet Model and Direct Integration of CFD With Detailed Chemistry
J. Eng. Gas Turbines Power (January,2007)
Comparison of Filter Smoke Number and Elemental Carbon Mass From Partially Premixed Low Temperature Combustion in a Direct-Injection Diesel Engine
J. Eng. Gas Turbines Power (October,2011)
Related Proceedings Papers
Related Chapters
Determination of the Effects of Safflower Biodiesel and Its Blends with Diesel Fuel on Engine Performance and Emissions in a Single Cylinder Diesel Engine
International Conference on Software Technology and Engineering, 3rd (ICSTE 2011)
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Practical Applications
Robust Control: Youla Parameterization Approach