Optical Measurements of Hydrocarbons Emitted from a Simulated Crevice Volume in an Engine 840378
The process of hydrocarbon emission from an engine crevice was simulated in an operating research engine by the introduction of a small tube into the combustion chamber. This simulated crevice volume was used to determine the fate of unburned hydrocarbons that interact with the crevice. Shadowgraph photography and spontaneous Raman spectroscopy were used to determine flow patterns, temperatures, and hydrocarbon concentrations 1 mm from the tube opening. Hydrocarbon species were first detected at the tube exit late in the expansion stroke, long after the start of outflow from the simulation volume. A flame was never observed near the tube exit. Unburned hydrocarbons exiting the tube did not undergo rapid oxidation at temperatures up to 1400 Kelvins.
Citation: Medina, S., Green, R., and Smith, J., "Optical Measurements of Hydrocarbons Emitted from a Simulated Crevice Volume in an Engine," SAE Technical Paper 840378, 1984, https://doi.org/10.4271/840378. Download Citation
Author(s):
S.C. Medina, R.M. Green, J.R. Smith
Affiliated:
Sandia National Laboratories, Livermore, CA
Pages: 12
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1984 Transactions-V93-84
Related Topics:
Hydrocarbons
Combustion chambers
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