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
Thermal Contributions and Balances in Flatness Measuring Roll: Modelling of Thermal Balances and Convective Heat Transfer Using CFD
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för ingenjörsvetenskap och fysik (from 2013).
2018 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)Alternativ titel
Termiska bidrag och balanser i planhetsmätare (Svenska)
Abstract [en]

Devices for measurement of flatness in rolling mills is important to ensure high quality products and fewer strip breaks. One of these devices take the form of a measuring roll, which the strip is guided over after it has exited the reduction stage in the mill. The roll is traditionally used in cold rolling applications, and a desire to move to hot rolling introduces demands for research into the thermal balances that develops under operation. This report aims to create an overview into some of the contributions that make up the thermal balance, namely external convection and friction losses in bearings. Other contributions have been investigated by C. Karlsson (Master of Science thesis, Karlstad University, 2018). The heat transfer coefficients obtained for external convection proved to be too small to sustain reasonable temperatures under operation, if no type of cooling apparatus is utilized. Even with external cooling using pressurized air, the convective heat dissipation is too low, due to efficient strip-to-roll conduction. From the modelling performed in this report, friction losses from bearings can be considered as negligible. A model for describing the thermal balances using Newton’s law of cooling was developed, and related to steady state operating conditions by the use of a correction factor. The factor was obtained by comparing the cooling law with the results of a more precise numerical model. The studies in this project elucidate the critical aspects of the thermal balances and provides a basis for further, more detailed modelling.

Ort, förlag, år, upplaga, sidor
2018. , s. 50
Nyckelord [en]
flatness measuring, rolling, thermal analysis, convection, thermal balances
Nationell ämneskategori
Annan fysik
Identifikatorer
URN: urn:nbn:se:kau:diva-67668OAI: oai:DiVA.org:kau-67668DiVA, id: diva2:1218364
Externt samarbete
ABB
Ämne / kurs
Fysik
Utbildningsprogram
Civilingenjör: Teknisk fysik (300 hp)
Handledare
Examinatorer
Tillgänglig från: 2018-06-14 Skapad: 2018-06-14 Senast uppdaterad: 2018-06-14Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Av organisationen
Institutionen för ingenjörsvetenskap och fysik (from 2013)
Annan fysik

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 145 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