Suppression of Soot Formation in Quasi-steady Diesel Spray Flame Produced by High-pressure Fuel Injection with Multi-orifice Nozzle Toyota Central R&D Labs., Incorporated

Format:

Book

Conference/Event

Author/Creator:

Fuyuto, Takayuki, author.

Contributor:

Hattori, Yoshiaki

Mandokoro, Yoshiyuki

Mashida, Makoto

Conference Name:

2019 JSAE/SAE Powertrains, Fuels and Lubricants (2019-08-26 : Kyoto, Japan)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2019

Summary:

The set-off length (also referred to as the "lift-off length") is reduced by the re-entrainment of the burned gas by the backward flow surrounding a diesel spray jet produced by a multi-hole nozzle. In the present study, to estimate the equivalence ratio at the set-off length, a means of estimating the amount of burned gas that is re-entrained into the near-nozzle region of the diesel spray jet was established. The results revealed that the suppression of soot formation in quasi-steady diesel spray flames produced by a multi-hole nozzle and a high injection pressure is not attained by reducing the equivalence ratio at the set-off length. Analysis of the amount of soot along the spray axis using a two-color method revealed that the maximum soot amount position appears in a quasi-steady spray flame, after the collapse of the head vortex in which a dense soot cloud is formed. The maximum soot amount position does not change even if the injection pressure varies. The suppression of soot formation by the application of a high injection pressure in an actual diesel engine was found to be caused by the shortening of the residence time in the soot formation region between the set-off length and the maximum soot amount position

Notes:

Vendor supplied data

Publisher Number:

2019-01-2270

Access Restriction:

Restricted for use by site license