Effects of injection parameters, fuel quality and ambient on the ignition delay and the location of the flame kernel in a diesel spray in a quiescent chamber

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:5934805

Chandorkar, S B; Dani, A D; Lakshminarayanan, P A

Ignition delay of diesel sprays is a strong function of ambient temperature and pressure. However, the physical delay has not been modelled satisfactorily in the literature. Phenomenological calculations of the cooling of spray surface have shown that the physical parameters and fuel type influence the temperature of the mixture of air and the vapor produced by the first parcel of the injected fuel throughout its life upto ignition. Ignition delay of a fuel, in the context of diesel engines, is the period from the time the first parcel of fuel enters the chamber to the point when the first flame is observed in the spray. This is different from the combustion performance of the fuel which influences the efficiency of the engine. The ignition delay of a diesel spray is important from the view point of preparing the fuel before injecting into the engine as well as selecting optimum injection timing.

• OSTI ID: 5934805
• Report Number(s): CONF-8809204-
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
DIESEL ENGINES
ENGINES
FLAMES
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
IGNITION
IGNITION QUALITY
INTERNAL COMBUSTION ENGINES
SPRAYS