Ignition quality determination of diesel fuels from hydrogen type distribution of hydrocarbons
Hydrogen types of diesel like hydrocarbon fuels which have dominant effect on the ignition quality have been identified. A scheme of characterizing the chemistry of hydrocarbon fuels in terms of these hydrogen types using proton nuclear resonance spectrometry has been proposed. Using this analysis technique on 70 different diesel fuels, whose cetane numbers were determined on a number of standard cetane rating engines, an empirical expression which relates the ignition quality to the hydrogen type distribution of the fuels has been developed. The developed expression and the relationship between the ignition delay and cetane number imply that the effective activation energy term in the usual semiempirical ignition delay expression is not a constant for a given fuel but is a function of pressure and temperature as well as the fuel chemistry.
- Research Organization:
- National Research Council of Canada, Division of Mechanical Engineering, M-9, Ottawa, Ontario KIA OR6
- OSTI ID:
- 5714903
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 63:1-2; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
025000* -- Petroleum-- Combustion
33 ADVANCED PROPULSION SYSTEMS
330102 -- Internal Combustion Engines-- Diesel
ACTIVATION ENERGY
ANTIKNOCK RATINGS
CONTROL
DIESEL ENGINES
DIESEL FUELS
ELEMENTS
ENERGY
ENGINES
HEAT ENGINES
HYDROCARBONS
HYDROGEN
IGNITION QUALITY
INTERNAL COMBUSTION ENGINES
KNOCK CONTROL
NONMETALS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PRESSURE DEPENDENCE
PROTON SPECTRA
SPECTRA
TEMPERATURE DEPENDENCE