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Study on low temperature heat release of partially premixed combustion in a heavy duty engine for real-time applications

Fang, Cheng LU ; Tunestal, Per LU ; Yin, Lianhao LU ; Yang, Fuyuan and Yang, Xiaofan (2019) In Applied Thermal Engineering 148. p.219-228
Abstract
Partially premixed combustion aims to reduce NOx and particulate matter emission without fuel consumption penalty. Low temperature heat release (LTHR) is an important process to be investigated. A novel motoring pressure prediction algorithm based on variable polytropic exponents was introduced and utilized to estimate average heat transfer coefficient as well as heat dissipation for real-time applications. A series of parameters, such as start of combustion (SOC) of LTHR, crank angle of 50% heat released (CA50) during LTHR, duration of LTHR and heat amount of LTHR, were further analyzed under different engine operation conditions. The results demonstrated that: (1) the absolute motoring pressure prediction error was below 0.5 bar with a... (More)
Partially premixed combustion aims to reduce NOx and particulate matter emission without fuel consumption penalty. Low temperature heat release (LTHR) is an important process to be investigated. A novel motoring pressure prediction algorithm based on variable polytropic exponents was introduced and utilized to estimate average heat transfer coefficient as well as heat dissipation for real-time applications. A series of parameters, such as start of combustion (SOC) of LTHR, crank angle of 50% heat released (CA50) during LTHR, duration of LTHR and heat amount of LTHR, were further analyzed under different engine operation conditions. The results demonstrated that: (1) the absolute motoring pressure prediction error was below 0.5 bar with a relative error below 4%; (2) the average heat released during LTHR was about 40–65 J, and the mass burned was about 1–3% of the total mass burned; (3) CA50 of LTHR was more stable than SOC of LTHR, and was a better indicator for real-time combustion phase control; (4) similar combustion phase and heat amount of LTHR could be reached by adjusting the timing of the third injection regardless the difference in timing of the second injection; (5) the combustion phase and heat amount of LTHR could be controlled by the duration of the second injection. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Thermal Engineering
volume
148
pages
219 - 228
publisher
Elsevier
external identifiers
  • scopus:85056764343
ISSN
1359-4311
DOI
10.1016/j.applthermaleng.2018.11.003
language
English
LU publication?
yes
id
a6e9decb-776a-4cfa-9686-f88ab36043ea
date added to LUP
2018-11-25 09:28:45
date last changed
2019-02-20 11:37:41
@article{a6e9decb-776a-4cfa-9686-f88ab36043ea,
  abstract     = {Partially premixed combustion aims to reduce NOx and particulate matter emission without fuel consumption penalty. Low temperature heat release (LTHR) is an important process to be investigated. A novel motoring pressure prediction algorithm based on variable polytropic exponents was introduced and utilized to estimate average heat transfer coefficient as well as heat dissipation for real-time applications. A series of parameters, such as start of combustion (SOC) of LTHR, crank angle of 50% heat released (CA50) during LTHR, duration of LTHR and heat amount of LTHR, were further analyzed under different engine operation conditions. The results demonstrated that: (1) the absolute motoring pressure prediction error was below 0.5 bar with a relative error below 4%; (2) the average heat released during LTHR was about 40–65 J, and the mass burned was about 1–3% of the total mass burned; (3) CA50 of LTHR was more stable than SOC of LTHR, and was a better indicator for real-time combustion phase control; (4) similar combustion phase and heat amount of LTHR could be reached by adjusting the timing of the third injection regardless the difference in timing of the second injection; (5) the combustion phase and heat amount of LTHR could be controlled by the duration of the second injection.},
  author       = {Fang, Cheng and Tunestal, Per and Yin, Lianhao and Yang, Fuyuan and Yang, Xiaofan},
  issn         = {1359-4311},
  language     = {eng},
  pages        = {219--228},
  publisher    = {Elsevier},
  series       = {Applied Thermal Engineering},
  title        = {Study on low temperature heat release of partially premixed combustion in a heavy duty engine for real-time applications},
  url          = {http://dx.doi.org/10.1016/j.applthermaleng.2018.11.003},
  volume       = {148},
  year         = {2019},
}