Ignition Sensitivity Study of Partially Premixed Combustion by Using Shadowgraphy and OH∗ Chemiluminescence Methods
(2016) SAE 2016 World Congress and Exhibition, 2016- Abstract
Partially Premixed Combustion (PPC) is a promising combustion concept for future IC engines. However, controllability of PPC is still a challenge and needs more investigation. The scope of the present study is to investigate the ignition sensitivity of PPC to the injection timing at different injection pressures. To better understand this, high-speed shadowgraphy is used to visualize fuel injection and evaporation at different Start of Injections (SOI). Spray penetration and injection targeting are derived from shadowgraphy movies. OH∗ chemiluminescence is used to comprehensively study the stratification level of combustion which is helpful for interpretation of ignition sensitivity behavior. Shadowgraphy results confirm that SOI... (More)
Partially Premixed Combustion (PPC) is a promising combustion concept for future IC engines. However, controllability of PPC is still a challenge and needs more investigation. The scope of the present study is to investigate the ignition sensitivity of PPC to the injection timing at different injection pressures. To better understand this, high-speed shadowgraphy is used to visualize fuel injection and evaporation at different Start of Injections (SOI). Spray penetration and injection targeting are derived from shadowgraphy movies. OH∗ chemiluminescence is used to comprehensively study the stratification level of combustion which is helpful for interpretation of ignition sensitivity behavior. Shadowgraphy results confirm that SOI strongly affects the spray penetration and evaporation of fuel. However, spray penetration and ignition sensitivity are barely affected by the injection pressure. There is a critical SOI range, in which a significant amount of fuel is trapped in the crevice volume. Injection in this critical range has a negative influence on the combustion efficiency and ignition sensitivity. Impingement of liquid fuel on the piston crown advances the combustion phasing by providing higher levels of stratification. Moreover, results of combustion stratification study show that stratification level has an inverse correlation with combustion phasing of PPC for late injections.
(Less)
- author
- Izadi Najafabadi, Mohammad ; Dam, Nico ; Somers, Bart and Johansson, Bengt LU
- organization
- publishing date
- 2016
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- SAE Technical Papers
- article number
- 2016-01-0761
- publisher
- Society of Automotive Engineers
- conference name
- SAE 2016 World Congress and Exhibition, 2016
- conference location
- Detroit, United States
- conference dates
- 2016-04-12 - 2016-04-14
- external identifiers
-
- scopus:85072356368
- DOI
- 10.4271/2016-01-0761
- language
- English
- LU publication?
- yes
- id
- e9c0ada0-29e3-4977-b0a9-b4be9f4e86de
- date added to LUP
- 2017-02-23 10:28:26
- date last changed
- 2022-04-01 06:53:25
@inproceedings{e9c0ada0-29e3-4977-b0a9-b4be9f4e86de,
abstract = {{<p>Partially Premixed Combustion (PPC) is a promising combustion concept for future IC engines. However, controllability of PPC is still a challenge and needs more investigation. The scope of the present study is to investigate the ignition sensitivity of PPC to the injection timing at different injection pressures. To better understand this, high-speed shadowgraphy is used to visualize fuel injection and evaporation at different Start of Injections (SOI). Spray penetration and injection targeting are derived from shadowgraphy movies. OH∗ chemiluminescence is used to comprehensively study the stratification level of combustion which is helpful for interpretation of ignition sensitivity behavior. Shadowgraphy results confirm that SOI strongly affects the spray penetration and evaporation of fuel. However, spray penetration and ignition sensitivity are barely affected by the injection pressure. There is a critical SOI range, in which a significant amount of fuel is trapped in the crevice volume. Injection in this critical range has a negative influence on the combustion efficiency and ignition sensitivity. Impingement of liquid fuel on the piston crown advances the combustion phasing by providing higher levels of stratification. Moreover, results of combustion stratification study show that stratification level has an inverse correlation with combustion phasing of PPC for late injections.</p>}},
author = {{Izadi Najafabadi, Mohammad and Dam, Nico and Somers, Bart and Johansson, Bengt}},
booktitle = {{SAE Technical Papers}},
language = {{eng}},
publisher = {{Society of Automotive Engineers}},
title = {{Ignition Sensitivity Study of Partially Premixed Combustion by Using Shadowgraphy and OH∗ Chemiluminescence Methods}},
url = {{http://dx.doi.org/10.4271/2016-01-0761}},
doi = {{10.4271/2016-01-0761}},
year = {{2016}},
}