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Manipulating Heat Release Features to Minimize Combustion Noise

Denny, Michael LU ; van den Ende, Luc ; Persson, Håkan LU and Andersson, Öivind LU (2019) In Fuel 263.
Abstract
Changes in combustion noise, eciency, and emissions are investigated as responses to boundary conditions and injection scheduling parameters of closely-coupled multiple-pilot strategies. The eects of pilot injection separation times, mixture dilution, and injection pressure are investigated. In order to minimize combustion noise, the heat release rate (HRR) should be as linear in its buildup as possible. Through low injection pressure, high dilution ratio, and close-coupling of the pilot injections, combustion noise can be minimized. It is possible to have too much mixture dilution or dwells which are too short, however. This causes excessive blending of combustion events which tends to increase combustion noise. Noise minimization though... (More)
Changes in combustion noise, eciency, and emissions are investigated as responses to boundary conditions and injection scheduling parameters of closely-coupled multiple-pilot strategies. The eects of pilot injection separation times, mixture dilution, and injection pressure are investigated. In order to minimize combustion noise, the heat release rate (HRR) should be as linear in its buildup as possible. Through low injection pressure, high dilution ratio, and close-coupling of the pilot injections, combustion noise can be minimized. It is possible to have too much mixture dilution or dwells which are too short, however. This causes excessive blending of combustion events which tends to increase combustion noise. Noise minimization though HRR shaping has also been achieved through injection rate shaping. Based on the learnings from each investigation, triple and quadruple pilot injection strategies are created for lowest possible combustion noise. The investigations also reveal the relative extent to which emissions, noise, and eciency are aected by each control parameter so that compromises in each response can be understood. (Less)
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Fuel
volume
263
publisher
Elsevier
external identifiers
  • scopus:85076626264
ISSN
0016-2361
DOI
10.1016/j.fuel.2019.116613
language
English
LU publication?
yes
id
f548b9d5-ecb7-49c4-9f95-008e2eebfe06
date added to LUP
2019-03-29 16:29:08
date last changed
2022-04-25 22:08:53
@article{f548b9d5-ecb7-49c4-9f95-008e2eebfe06,
  abstract     = {{Changes in combustion noise, eciency, and emissions are investigated as responses to boundary conditions and injection scheduling parameters of closely-coupled multiple-pilot strategies. The eects of pilot injection separation times, mixture dilution, and injection pressure are investigated. In order to minimize combustion noise, the heat release rate (HRR) should be as linear in its buildup as possible. Through low injection pressure, high dilution ratio, and close-coupling of the pilot injections, combustion noise can be minimized. It is possible to have too much mixture dilution or dwells which are too short, however. This causes excessive blending of combustion events which tends to increase combustion noise. Noise minimization though HRR shaping has also been achieved through injection rate shaping. Based on the learnings from each investigation, triple and quadruple pilot injection strategies are created for lowest possible combustion noise. The investigations also reveal the relative extent to which emissions, noise, and eciency are aected by each control parameter so that compromises in each response can be understood.}},
  author       = {{Denny, Michael and van den Ende, Luc and Persson, Håkan and Andersson, Öivind}},
  issn         = {{0016-2361}},
  language     = {{eng}},
  month        = {{12}},
  publisher    = {{Elsevier}},
  series       = {{Fuel}},
  title        = {{Manipulating Heat Release Features to Minimize Combustion Noise}},
  url          = {{http://dx.doi.org/10.1016/j.fuel.2019.116613}},
  doi          = {{10.1016/j.fuel.2019.116613}},
  volume       = {{263}},
  year         = {{2019}},
}