Investigation of particulate formation during diesel spray combustion
The objective of the contract is to conduct an experimental and analytical research program to investigate strategies for using coherent anti-Stokes Raman scattering (CARS) laser diagnostic techniques for detecting the degree of fuel pyrolysis and determining fuel-air ratio. Smoke and NO{sub x} production rates depend in a complex way on the local temperature, the evaporation of the diesel spray, the local fuel-air ratio, and the pyrolysis history of fuels. Furthering the ability of CARS to provide more of this information may give engine designers more insight into the combustion process and allow them to create engines which produce fewer particulates or lower amounts of NO{sub x}. Controlling the production rates is preferable to processing emissions. If they cannot be suppressed simultaneously, adjusting the tradeoff between producing particulates or NO{sub x} may be helpful if an exhaust processing method is available for one of them. During the present quarter CARS results have been obtained in the reference/calibration cell with toluene vapor. These CARS results appear very favorable for use of toluene in 1 atm spray chamber studies as a room temperature saturated vapor mixture with CO{sub x} and N{sub 2}. The results indicate that toluene is likely a better candidate than hexane for droplet effects studies. Strong toluene CH stretch resonant CARS peaks have been found and three useful resonant CARS spectral features have been found near CO{sub 2} CARS.
- Research Organization:
- United Technologies Research Center, East Hartford, CT (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-87AL43058
- OSTI ID:
- 5551640
- Report Number(s):
- DOE/AL/43058-T12; ON: DE92009602
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation of particulate formation during diesel spray combustion. Technical progress quarterly report, September 1, 1988--November 30, 1988
Investigation of particulate formation during diesel spray combustion. Technical progress quarterly report, December 1, 1988--February 28, 1989
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COMBUSTION PRODUCTS
RAMAN SPECTROSCOPY
DIESEL FUELS
COMBUSTION PROPERTIES
TOLUENE
RAMAN SPECTRA
CARBON DIOXIDE
DIESEL ENGINES
FUEL-AIR RATIO
MIXING
NITROGEN OXIDES
PARTICULATES
PROGRESS REPORT
PYROLYSIS
SMOKES
SPRAYS
AEROSOLS
ALKYLATED AROMATICS
AROMATICS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
DECOMPOSITION
DISPERSIONS
DOCUMENT TYPES
ENERGY SOURCES
ENGINES
FOSSIL FUELS
FUELS
GAS OILS
HEAT ENGINES
HYDROCARBONS
INTERNAL COMBUSTION ENGINES
LASER SPECTROSCOPY
LIQUID FUELS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
RESIDUES
SOLS
SPECTRA
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
330705* - Emission Control- Particulates
330701 - Emission Control- Nitrogen Oxides
400800 - Combustion
Pyrolysis
& High-Temperature Chemistry
400102 - Chemical & Spectral Procedures