Understanding the effect of Intake temperature on the ϕ-sensitivity of toluene-ethanol reference fuels and neat ethanol
(2023) In International Journal of Engine Research 24(7). p.2908-2920- Abstract
- The low-temperature combustion (LTC) is an attractive concept that enables the modem combustion engines to move toward sustainability mainly by increasing the efficiency and decreasing the emissions. The modern combustion engines which are working based on the LTC concept have specific fuel requirements. Fuel ϕ-sensitivity is a key factor to be considered for tailoring fuels for these engines. Fuel with a high ϕ-sensitivity are more responsive to thermal or fuel stratifications; the auto-ignition properties of different air-fuel mixtures of these fuels, with different equivalence ratio (ϕ), are more diverse. This diversity provide a smoother heat release rate in stratified condition. In this study 11 different toluene–ethanol reference... (More)
- The low-temperature combustion (LTC) is an attractive concept that enables the modem combustion engines to move toward sustainability mainly by increasing the efficiency and decreasing the emissions. The modern combustion engines which are working based on the LTC concept have specific fuel requirements. Fuel ϕ-sensitivity is a key factor to be considered for tailoring fuels for these engines. Fuel with a high ϕ-sensitivity are more responsive to thermal or fuel stratifications; the auto-ignition properties of different air-fuel mixtures of these fuels, with different equivalence ratio (ϕ), are more diverse. This diversity provide a smoother heat release rate in stratified condition. In this study 11 different toluene–ethanol reference fuels (TERFs) in three research octane number (RON) groups of 63, 84, and 105 together with neat ethanol are evaluated. The Lund ϕ-sensitivity method is used to evaluate these fuels in a cooperative fuel research (CFR) engine. The effect of variation of intake temperature on pressure sensitivity of fuel at a constant combustion phasing is evaluated. This evaluation is performed at two intake temperature of 373 and 423 K, and the results are compared with the outcome of the Lund ϕ-sensitivity number with the intake temperature of 323 K. This study shows that the CR sensitivity response of different blends to the intake charge temperature variation depends on the fuel composition. Accumulated low temperature heat release and latent heat of vaporization. It proves that the fuel ϕ-sensitivity will vary under different thermodynamic conditions. There was a clear link between the accumulated heat released during the early reaction and CR sensitivity of the blends at different intake temperature of 373 and 423 K but the link with the latent heat of vaporization (HoV) found to be inexplicit. (Less)
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https://lup.lub.lu.se/record/d7f871db-d7f9-44ba-bc3b-4f1ec9aef37b
- author
- Alemahdi, Nika LU ; García, Antonio and Tunér, Martin LU
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Homogenous charge compressed ignition intake charge temperature compression ratio ϕ-sensitivity latent heat of vaporization, intake charge temperature, compression ratio, ϕ-sensitivity, latent heat of vaporization
- in
- International Journal of Engine Research
- volume
- 24
- issue
- 7
- pages
- 2908 - 2920
- publisher
- Professional Engineering Publishing
- external identifiers
-
- scopus:85142708150
- ISSN
- 1468-0874
- DOI
- 10.1177/14680874221134147
- language
- English
- LU publication?
- yes
- id
- d7f871db-d7f9-44ba-bc3b-4f1ec9aef37b
- date added to LUP
- 2023-01-08 22:43:12
- date last changed
- 2023-11-21 01:20:04
@article{d7f871db-d7f9-44ba-bc3b-4f1ec9aef37b,
abstract = {{The low-temperature combustion (LTC) is an attractive concept that enables the modem combustion engines to move toward sustainability mainly by increasing the efficiency and decreasing the emissions. The modern combustion engines which are working based on the LTC concept have specific fuel requirements. Fuel ϕ-sensitivity is a key factor to be considered for tailoring fuels for these engines. Fuel with a high ϕ-sensitivity are more responsive to thermal or fuel stratifications; the auto-ignition properties of different air-fuel mixtures of these fuels, with different equivalence ratio (ϕ), are more diverse. This diversity provide a smoother heat release rate in stratified condition. In this study 11 different toluene–ethanol reference fuels (TERFs) in three research octane number (RON) groups of 63, 84, and 105 together with neat ethanol are evaluated. The Lund ϕ-sensitivity method is used to evaluate these fuels in a cooperative fuel research (CFR) engine. The effect of variation of intake temperature on pressure sensitivity of fuel at a constant combustion phasing is evaluated. This evaluation is performed at two intake temperature of 373 and 423 K, and the results are compared with the outcome of the Lund ϕ-sensitivity number with the intake temperature of 323 K. This study shows that the CR sensitivity response of different blends to the intake charge temperature variation depends on the fuel composition. Accumulated low temperature heat release and latent heat of vaporization. It proves that the fuel ϕ-sensitivity will vary under different thermodynamic conditions. There was a clear link between the accumulated heat released during the early reaction and CR sensitivity of the blends at different intake temperature of 373 and 423 K but the link with the latent heat of vaporization (HoV) found to be inexplicit.}},
author = {{Alemahdi, Nika and García, Antonio and Tunér, Martin}},
issn = {{1468-0874}},
keywords = {{Homogenous charge compressed ignition intake charge temperature compression ratio ϕ-sensitivity latent heat of vaporization; intake charge temperature; compression ratio; ϕ-sensitivity; latent heat of vaporization}},
language = {{eng}},
number = {{7}},
pages = {{2908--2920}},
publisher = {{Professional Engineering Publishing}},
series = {{International Journal of Engine Research}},
title = {{Understanding the effect of Intake temperature on the ϕ-sensitivity of toluene-ethanol reference fuels and neat ethanol}},
url = {{http://dx.doi.org/10.1177/14680874221134147}},
doi = {{10.1177/14680874221134147}},
volume = {{24}},
year = {{2023}},
}