TY - JOUR
T1 - The Effects of Injection Timing and Duration on Jet Penetration and Mixing in Multiple-Injection Schedules
AU - Borz, Meghan J.
AU - Kim, Yoontak
AU - O'Connor, Jacqueline
N1 - Funding Information:
The authors wish to acknowledge the support of this work provided by Volvo Technology of America and the U.S. Department of Energy under DOE award number DEEE0004232. Thanks to Samuel Mclaughlin and Richard Morton of Volvo Technology of America. Additionally, the authors thank Daniel Ruth for his assistance with image post-processing.
Publisher Copyright:
© Copyright 2016 SAE International.
PY - 2016/4/5
Y1 - 2016/4/5
N2 - Advanced injection schedules involving multiple injections have been utilized for reducing the peak cylinder pressure, phasing heat release rate, and reducing emissions in diesel engines. The timing and duration of the injections determine the injection schedule efficacy at achieving these effects. The goal of this work is to develop tools to track multiple injections to develop a better understanding of interaction mechanisms between subsequent injections. Both timing and duration effects are captured by using three different dwell times and seven injection durations. Experimental gas jet studies are conducted using schlieren. The jet-tip penetration rate, S, results do not reveal significant differences in jet-tip penetration with variations in the first-injection duration and dwell between injections. However, it was found that the jet spreading angles between the first and second injections differed, with the first injection having a higher average angle during the quasi-steady portion of the injection. This is indicative of differences in jet mixing and entrainment between the first and second injection.
AB - Advanced injection schedules involving multiple injections have been utilized for reducing the peak cylinder pressure, phasing heat release rate, and reducing emissions in diesel engines. The timing and duration of the injections determine the injection schedule efficacy at achieving these effects. The goal of this work is to develop tools to track multiple injections to develop a better understanding of interaction mechanisms between subsequent injections. Both timing and duration effects are captured by using three different dwell times and seven injection durations. Experimental gas jet studies are conducted using schlieren. The jet-tip penetration rate, S, results do not reveal significant differences in jet-tip penetration with variations in the first-injection duration and dwell between injections. However, it was found that the jet spreading angles between the first and second injections differed, with the first injection having a higher average angle during the quasi-steady portion of the injection. This is indicative of differences in jet mixing and entrainment between the first and second injection.
UR - http://www.scopus.com/inward/record.url?scp=84975246702&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84975246702&partnerID=8YFLogxK
U2 - 10.4271/2016-01-0856
DO - 10.4271/2016-01-0856
M3 - Conference article
AN - SCOPUS:84975246702
SN - 0148-7191
VL - 2016-April
JO - SAE Technical Papers
JF - SAE Technical Papers
IS - April
T2 - SAE 2016 World Congress and Exhibition
Y2 - 12 April 2016 through 14 April 2016
ER -