Numerical Investigation of Methanol Ignition Sequence in an Optical PPC Engine with Multiple Injection Strategies
Pucilowski, Mateusz LU ; Fatehi, Hesameddin LU ; Jangi, Mehdi LU ; Lonn, Sara LU ; Matamis, Alexios LU
; Andersson, Oivind
LU
; Richter, Mattias
LU
and Bai, Xue Song
LU
(2019)
SAE 14th International Conference on Engines and Vehicles, ICE 2019
In SAE Technical Papers
- Abstract
Methanol is a genuine candidate on the alternative fuel market for internal combustion engines, especially within the heavy-duty transportation sector. Partially premixed combustion (PPC) engine concept, known for its high efficiency and low emission rates, can be promoted further with methanol fuel due to its unique thermo-physical properties. The low stoichiometric air to fuel ratio allows to utilize late injection timings, which reduces the wall-wetting effects, and thus can lead to less unburned hydrocarbons. Moreover, combustion of methanol as an alcohol fuel, is free from soot emissions, which allows to extend the operation range of the engine. However, due to the high latent heat of vaporization, the ignition event requires a... (More)
Methanol is a genuine candidate on the alternative fuel market for internal combustion engines, especially within the heavy-duty transportation sector. Partially premixed combustion (PPC) engine concept, known for its high efficiency and low emission rates, can be promoted further with methanol fuel due to its unique thermo-physical properties. The low stoichiometric air to fuel ratio allows to utilize late injection timings, which reduces the wall-wetting effects, and thus can lead to less unburned hydrocarbons. Moreover, combustion of methanol as an alcohol fuel, is free from soot emissions, which allows to extend the operation range of the engine. However, due to the high latent heat of vaporization, the ignition event requires a high inlet temperature to achieve ignition event. In this paper LES simulations together with experimental measurements on an heavy-duty optical engine are used to study methanol PPC engine. After a successful calibration of the pressure trace in terms of required intake temperature and combustion model, the optical natural luminosity data is used to validate prediction of ignition kernel and vapor penetration length. Moreover, it is shown that the inlet temperature requirement is reduced by 47 K degrees when applying multiple injection strategy. Changing the injection strategy also affects the average temperature of combustion and thus the emissions rates. Additionally, an ignition sequence analysis is performed to identify the mode of combustion and the heat release (HR) distribution depending on the local equivalence ratio, recognizing characteristics of PPC regime. Based on this analysis, a conceptual heat distribution model for PPC engine and other low temperature combustion (LTC) engine concepts is proposed.
(Less)
- author
- Pucilowski, Mateusz
LU
; Fatehi, Hesameddin
LU
; Jangi, Mehdi
LU
; Lonn, Sara
LU
; Matamis, Alexios
LU
; Andersson, Oivind
LU
; Richter, Mattias
LU
and Bai, Xue Song
LU
- organization
- publishing date
- 2019-09-09
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- 14th International Conference on Engines & Vehicles: Technical papers
- series title
- SAE Technical Papers
- article number
- 2019-24-0007
- publisher
- Society of Automotive Engineers
- conference name
- SAE 14th International Conference on Engines and Vehicles, ICE 2019
- conference location
- Capri, Italy
- conference dates
- 2019-09-15 - 2019-09-19
- external identifiers
-
- scopus:85074393458
- ISSN
- 0148-7191
- DOI
- 10.4271/2019-24-0007
- language
- English
- LU publication?
- yes
- id
- 2aa44415-290a-4b33-8fe0-a3266d132d46
- date added to LUP
- 2019-11-21 11:05:58
- date last changed
- 2022-04-18 18:51:13
@inproceedings{2aa44415-290a-4b33-8fe0-a3266d132d46,
abstract = {{<p>Methanol is a genuine candidate on the alternative fuel market for internal combustion engines, especially within the heavy-duty transportation sector. Partially premixed combustion (PPC) engine concept, known for its high efficiency and low emission rates, can be promoted further with methanol fuel due to its unique thermo-physical properties. The low stoichiometric air to fuel ratio allows to utilize late injection timings, which reduces the wall-wetting effects, and thus can lead to less unburned hydrocarbons. Moreover, combustion of methanol as an alcohol fuel, is free from soot emissions, which allows to extend the operation range of the engine. However, due to the high latent heat of vaporization, the ignition event requires a high inlet temperature to achieve ignition event. In this paper LES simulations together with experimental measurements on an heavy-duty optical engine are used to study methanol PPC engine. After a successful calibration of the pressure trace in terms of required intake temperature and combustion model, the optical natural luminosity data is used to validate prediction of ignition kernel and vapor penetration length. Moreover, it is shown that the inlet temperature requirement is reduced by 47 K degrees when applying multiple injection strategy. Changing the injection strategy also affects the average temperature of combustion and thus the emissions rates. Additionally, an ignition sequence analysis is performed to identify the mode of combustion and the heat release (HR) distribution depending on the local equivalence ratio, recognizing characteristics of PPC regime. Based on this analysis, a conceptual heat distribution model for PPC engine and other low temperature combustion (LTC) engine concepts is proposed.</p>}},
author = {{Pucilowski, Mateusz and Fatehi, Hesameddin and Jangi, Mehdi and Lonn, Sara and Matamis, Alexios and Andersson, Oivind and Richter, Mattias and Bai, Xue Song}},
booktitle = {{14th International Conference on Engines & Vehicles: Technical papers}},
issn = {{0148-7191}},
language = {{eng}},
month = {{09}},
publisher = {{Society of Automotive Engineers}},
series = {{SAE Technical Papers}},
title = {{Numerical Investigation of Methanol Ignition Sequence in an Optical PPC Engine with Multiple Injection Strategies}},
url = {{http://dx.doi.org/10.4271/2019-24-0007}},
doi = {{10.4271/2019-24-0007}},
year = {{2019}},
}