Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Segmentation Algorithm for Diesel Spray Image Analysis
Scania CV AB.ORCID iD: 0000-0001-9483-7992
Scania CV AB.
2004 (English)In: Applied Optics, ISSN 0003-6935, E-ISSN 1539-4522, Vol. 43, no 32, 5971-5980 p.Article in journal (Refereed) Published
Abstract [en]

An algorithm for segmentation of diesel spray images has been developed. Its most important feature is robustness against experimental setups that fail to guarantee images whose histograms show two distinct peaks. According to the approach presented, only the peak from the background is used, and it is assumed that the background peak is narrow enough not to include too much of the spray. The algorithm has proved successful for evaluation of images from a pressurized vessel as well as from an engine with optical access, with no need for adjusting the tuning parameters. By adjusting them, one may tune the noise sensitivity.

Place, publisher, year, edition, pages
2004. Vol. 43, no 32, 5971-5980 p.
Keyword [en]
Automated segmentation; Diesel spray images; Histograms; Tuning parameters; Algorithms; Diesel fuels; Image segmentation; Lighting; Nozzles; Pressure vessels; Spraying; Image analysis
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-6774DOI: 10.1364/AO.43.005971ISI: 000225144000008OAI: oai:DiVA.org:kth-6774DiVA: diva2:11579
Note
QC 20100825Available from: 2007-02-14 Created: 2007-02-14 Last updated: 2010-08-25Bibliographically approved
In thesis
1. Experimental Investigation of Impinging Diesel Sprays for HCCI Combustion
Open this publication in new window or tab >>Experimental Investigation of Impinging Diesel Sprays for HCCI Combustion
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Engine research and development is to a large extent driven by the quest of lowering exhaust emissions and fuel consumption. The combination of low emissions and low fuel consumption is not the simultaneous characteristic of the world’s primary engine concepts, the diesel and the spark-ignited (SI) engine. However, such a concept do exist, it is commonly called Homogeneous Charge Compression Ignition (HCCI).

The HCCI combustion concept is when a premixed air and fuel mixture is ignited by the heat of compression. The operation is unthrottled, like the diesel engine, which is advantageous for its efficiency. The premixed air / fuel mixture preclude soot formation, like the SI engine. An exclusive feature of HCCI combustion is extremely low NOX production due to low-temperature combustion.

The mixture preparation of the typical gasoline HCCI engine is similar to the SI engine, via port-injection, which results in a well homogenized mixture. Port injection of diesel fuel is however very difficult since the environment is too cold for the fuel to vaporise. A better alternative is therefore direct-injection. However, injection must occur in a way where a homogeneous mixture is formed, while contact of the liquid fuel with cold walls is avoided.

There are many approaches to direct-injected mixture formation. This thesis focuses on exploring the concept of impinging sprays; its characteristics and its impact on combustion and emissions. The work comprises unique information regarding impinging sprays, as well as results regarding engine performance. It is concluded that impinging sprays are well suited for early direct-injection.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. viii, 70 p.
Series
Trita-MMK, ISSN 1400-1179 ; 2006:17
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-4276 (URN)
Public defence
2007-02-21, Sal F3, KTH, Lindstedtsvägen 26, Stockholm, 14:00
Opponent
Supervisors
Note
QC 20100824Available from: 2007-02-14 Created: 2007-02-14 Last updated: 2010-08-24Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textOptics InfoBase

Authority records BETA

Cronhjort, Andreas

Search in DiVA

By author/editor
Cronhjort, AndreasWåhlin, Fredrik
In the same journal
Applied Optics
Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 258 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf