Relative Roles of Premixed and Diffusion Burning in Diesel Combustion General Motors Research Laboratories

Format:

Conference/Event

Author/Creator:

Plee, Steven L., author.

Conference Name:

1983 SAE International Fall Fuels and Lubricants Meeting and Exhibition (1983-10-31 : San Francisco, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1983

Summary:

Relative roles of premixed and diffusion burning in diesel combustion have been examined in terms of characteristic times for ignition delay (τig), combustion (τc) and fuel-air mixing (τm). Results indicate that the majority of the diesel combustion process is diffusion controlled, as in gas turbine combustion, since τc << τm over the entire range of operating conditions. During the ignition phase, some premixed burning can occur in the fringe of the fuel spray where τm < τig; however, most of the fuel injected prior to ignition also burns in the diffusion mode, since τm > τig in the majority of the fuel spray. The fraction of premixed burning which occurs during the ignition phase is increased by longer τig, high rates of fuel injection, high air swirl and the use of multi-hole injectors, which increase the surface area of the spray

Notes:

Vendor supplied data

Publisher Number:

831733

Access Restriction:

Restricted for use by site license