Investigation of particulate formation during diesel spray combustion. Technical progress quarterly report, June 1, 1989--August 31, 1989
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, Washington, DC (United States)
- DOE Contract Number:
- AC04-87AL43058
- OSTI ID:
- 10128635
- Report Number(s):
- DOE/AL/43058-T12; ON: DE92009602
- Resource Relation:
- Other Information: PBD: [1989]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation of particulate formation during diesel spray combustion. Technical progress quarterly report, March 1, 1989--May 31, 1989
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DIESEL FUELS
COMBUSTION PROPERTIES
COMBUSTION PRODUCTS
RAMAN SPECTROSCOPY
TOLUENE
RAMAN SPECTRA
PROGRESS REPORT
NITROGEN OXIDES
PARTICULATES
FUEL-AIR RATIO
PYROLYSIS
SMOKES
MIXING
DIESEL ENGINES
SPRAYS
CARBON DIOXIDE
330705
330701
400800
400102
COMBUSTION, PYROLYSIS, AND HIGH-TEMPERATURE CHEMISTRY
CHEMICAL AND SPECTRAL PROCEDURES