Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
PIV Investigation of the Intake Flow in a Parallel Valves Diesel Engine Cylinder
KTH, Skolan för teknikvetenskap (SCI), Mekanik.
2015 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

Preliminary designs for the cylinder heads of Scania’s next generation Diesel Engine have been investigated by the means of PIV measurements on a steady test rig. General structures present in the flow have been investigated, with a specific focus on Swirl motion due to its well documented impact on combustion efficiency and pollution generation. The first set of measurements was acquired in the tumble plane. A method to perform efficiently PIV measurements was introduced, which consists in rotating the experimental setup rather than the PIV measurement instruments. As a consequence, a considerable amount of work is saved and a great number of measurement planes can be acquired. This method has allowed to reconstruct a 3D3C picture of the flow in the cylinder. Such 3D3C direct measurement of flow in a test rig cylinder had not been reported previously in the literature, as far as the author is aware of it. The second set of measurements was acquired in the swirl plane. General patterns in the swirl velocity fields have been identified. The author introduces the hypothesis that shifting down the measurement position may, to some extend, be equivalent to observing the flow evolve in time in the real engine situation. Measurement performed far enough under the valves exhibit clear and stable swirling vortex structure with the cylinder heads investigated. This may explain for the validity of the combustion models used in the industry that, despite apparent over simplification of the flow situation, have proved in good agreement with engine tests.

Ort, förlag, år, upplaga, sidor
2015. , 122 s.
Nyckelord [en]
Admission stroke, Flow in cylinder, Swirl motion, Admission channels
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:kth:diva-171430OAI: oai:DiVA.org:kth-171430DiVA: diva2:843998
Handledare
Examinatorer
Tillgänglig från: 2015-08-04 Skapad: 2015-08-03 Senast uppdaterad: 2015-08-04Bibliografiskt granskad

Open Access i DiVA

fulltext(25640 kB)382 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 25640 kBChecksumma SHA-512
d34bb7538e1b76bad355f3bbb8523dd318a0712a11ad0ba56058c2ce77ce77598088c07177e5b25b43a41c5736d680eba83515af200a85bc3fe7849fd9c4b0d0
Typ fulltextMimetyp application/pdf

Av organisationen
Mekanik
Teknik och teknologier

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 382 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 1151 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf