Towards identifying flame patterns in multiple, late injection schemes on a single cylinder optical diesel engine
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
The work investigates the effect of various post-injection strategies on the flame patterns in a Ricardo
Hydra optical single cylinder light duty diesel engine, operated in a partially premixed combustion
mode (PPC), under low load (IMEP: ca. 2.3 bar) low speed (1200 rpm) conditions. The effect of postinjection
fuel amount (12 and 24% of the total fuel quantity per cycle) and post-injection timing (0,
5, 10 deg aTDC) are investigated via pressure trace analysis and optical measurements. Flame
propagation is captured by means of high speed flame natural luminosity imaging and of CH*
, C2
*
and OH*
line-of-sight chemiluminescence measurements. Results indicate that post-injections
suppress mixture reactivity but enhances oxidation, and that a larger amount of fuel and/or later post
injection, leads to higher levels of natural luminosity, indicating possible higher soot-out emissions,
while post injection close to the main combustion event appears to have a beneficial effect on the soot
oxidation processes.
Hydra optical single cylinder light duty diesel engine, operated in a partially premixed combustion
mode (PPC), under low load (IMEP: ca. 2.3 bar) low speed (1200 rpm) conditions. The effect of postinjection
fuel amount (12 and 24% of the total fuel quantity per cycle) and post-injection timing (0,
5, 10 deg aTDC) are investigated via pressure trace analysis and optical measurements. Flame
propagation is captured by means of high speed flame natural luminosity imaging and of CH*
, C2
*
and OH*
line-of-sight chemiluminescence measurements. Results indicate that post-injections
suppress mixture reactivity but enhances oxidation, and that a larger amount of fuel and/or later post
injection, leads to higher levels of natural luminosity, indicating possible higher soot-out emissions,
while post injection close to the main combustion event appears to have a beneficial effect on the soot
oxidation processes.
Date Issued
2016-10-28
Date Acceptance
2016-05-15
Citation
Combustion Science and Technology, 2016, 188 (11-12), pp.2217-2235
ISSN
1563-521X
Publisher
Taylor & Francis
Start Page
2217
End Page
2235
Journal / Book Title
Combustion Science and Technology
Volume
188
Issue
11-12
Copyright Statement
© 2016 Taylor & Francis. This is an Author's Accepted Manuscript of an article published in [include the complete citation information for the final version of the article as published in the Combustion Science and Technology, available online at: http://www.tandfonline.com/10.1080/00102202.2016.1211884
Sponsor
Ford Motor Company Ltd
Grant Number
EVL PO08 K85202
Subjects
Energy
Chemical Engineering
Mechanical Engineering
Publication Status
Published
Date Publish Online
2016-10-28