A rapid compression machine was used to study the soot formation process under diesel enginelike conditions. The apparatus creates accurately controlled conditions at the end of compression (uniform mixture, temperature, and well-defined mixture composition) and, by decoupling chemistry with mixing, provides an unambiguous data interpretation for kinetics study. The soot evolution was studied by the line-of-sight absorption method (at ), which measured the soot volume concentration evolution in the initial stage of soot growth before the optical path became opaque. For a rich butane mixture at fuel equivalence ratio of 3, the ignition delay showed a negative temperature dependence at intermediate temperatures. The soot volume fraction showed an initial exponential growth, with a growth rate depending on the compressed charge fuel concentration. A substantial amount of soot was formed after the soot cloud became opaque. By weighing the total soot particles after the experiment, only of the soot mass was formed when the beam transmission was reduced to 5%. The final soot mass was of the total carbon mass for compressed charge density of and temperature from .
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October 2006
Technical Papers
Soot Formation Study in a Rapid Compression Machine
I. Kitsopanidis,
I. Kitsopanidis
Sloan Automotive Laboratory, Department of Mechanical Engineering,
Massachusetts Institute of Technology
, 77 Massachusetts Avenue, Cambridge, MA 02139
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W. K. Cheng
W. K. Cheng
Sloan Automotive Laboratory, Department of Mechanical Engineering,
Massachusetts Institute of Technology
, 77 Massachusetts Avenue, Cambridge, MA 02139
Search for other works by this author on:
I. Kitsopanidis
Sloan Automotive Laboratory, Department of Mechanical Engineering,
Massachusetts Institute of Technology
, 77 Massachusetts Avenue, Cambridge, MA 02139
W. K. Cheng
Sloan Automotive Laboratory, Department of Mechanical Engineering,
Massachusetts Institute of Technology
, 77 Massachusetts Avenue, Cambridge, MA 02139J. Eng. Gas Turbines Power. Oct 2006, 128(4): 942-949 (8 pages)
Published Online: October 24, 2005
Article history
Received:
July 11, 2005
Revised:
October 24, 2005
Citation
Kitsopanidis, I., and Cheng, W. K. (October 24, 2005). "Soot Formation Study in a Rapid Compression Machine." ASME. J. Eng. Gas Turbines Power. October 2006; 128(4): 942–949. https://doi.org/10.1115/1.2180279
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