An Experimental Investigation of the Injection Process in a Direct-Injected Natural Gas Engine Using PLIF and CARS

A set of scaling factors derived from the conservation equations effectively collapsed fuel jet penetration measurements under both motoring and stationary piston conditions. The scaling factors are based on the pseudo diameter of the jet, which is the diameter of an equivalent sonic jet expanded to match the in-cylinder conditions. The penetration of the fuel jets compared favorably to a two-region vortex ball model of jet penetration. The CARS measurements show large fluctuations in fuel concentration on a shot-to-shot basis, which are consistent with the large-scale mixing structures evident in the PLIF images.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Rubas, Paul Joseph

Contributors dc:contributor

• Peters, J.E.

• Engineering, Mechanical

Language dc:language

eng

Identifier

(MiAaPQ)AAI9812758

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83961