Soot and fuel distribution imaging in a diesel engine
- Sandia National Labs., Livermore, CA (United States)
- Pennsylvania State Univ., University Park, PA (United States)
- 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:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DR00789
- OSTI ID:
- 10172203
- Report Number(s):
- SAND-92-8507; CONF-920815-5; ON: DE92018658
- Resource Relation:
- Conference: 204. American Chemical Society (ACS) national meeting,Washington, DC (United States),23-28 Aug 1992; Other Information: PBD: Jun 1992
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ignition and early soot formation in a D.I. diesel engine using multiple 2-D imaging diagnostics
Soot and liquid-phase fuel distributions in a newly designed optically accessible D.I. diesel engine