Soot and fuel distribution imaging in a diesel engine

Conference · Mon Jun 01 04:00:00 EDT 1992

OSTI ID:7177646

Dec, J E; Siebers, D L ^[1]; Espey, C ^[2]; zur Loye, A O ^[3]

---

1. Sandia National Labs., Livermore, CA (United States)
2. Pennsylvania State Univ., University Park, PA (United States)
3. Cummins Engine Co., Inc., Columbus, IN (United States)

Various 2-D imaging diagnostics have been used to investigate the soot and fuel distributions in the cylinder of a direct-injection diesel engine modified for optical access. Planar laser-induced incandescence (LII), planar elastic scattering, and natural flame luminosity imaging were used for soot distribution studies. The fuel distribution was examined via planar laser-induced fluorescence (LIF) and planar elastic/Mie scattering. To minimize optical attenuation, a lowsooting fuel (whose vaporization and combustion characteristics are typical of standard diesel fuels) was developed, compared with a standard fuel, and used for most studies. These studies showed that the soot is distributed throughout the cross-section of the combusting spray plume, and that there is generally a higher concentration of larger soot particles towards the leading edge of the plume. The extent of the soot distribution upstream towards the injecter varies with engine speed and injection pressure. Fuel remains as a liquid to a maximum of about 33 mm from the injecter, although vaporized fuel penetrates much further. Only vapor-phase fuel is found in the region where most combustion occurs.

• Research Organization: Sandia National Labs., Livermore, CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DR00789
• OSTI ID: 7177646
• Report Number(s): SAND-92-8507; CONF-920815--5; ON: DE92018658
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
330704 -- Emission Control-- Hydrocarbons
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DIESEL ENGINES
DIESEL FUELS
ELASTIC SCATTERING
EMISSION
ENERGY SOURCES
ENGINES
EXHAUST GASES
FLUIDS
FOSSIL FUELS
FUELS
GAS OILS
GASEOUS WASTES
GASES
HEAT ENGINES
IMAGES
INTERNAL COMBUSTION ENGINES
KINETICS
LASER SPECTROSCOPY
LIQUID FUELS
LUMINOSITY
OPTICAL PROPERTIES
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
REACTION KINETICS
SCATTERING
SOOT
SPECTROSCOPY
WASTES