Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • 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
CFD Validation of Tip Clearance Flows in an Axial Compressor
2016 (Engelska)Självständigt arbete på avancerad nivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
Abstract [en]

When designing a compressor it is desirable to keep the development cost low while ensuring that the compressor meets the required performance. The typical strategy to dene a complete 3D compressor geometry is to use CFD models in combination with an optimization tool. The general problem with this is that the optimization requires many CFD evaluations and the more physically correct the CFD model is, the more computationally costly it becomes. Therefore the complexity of the CFD model at this stage of the design process must be kept relatively low in order to meet the targeted development cost and time. When the most promising designs have been identified, a more physically correct but more computationally heavy model is used to verify the compressor performance. Up to the present however, there has been no CFD model capable of fully capture the flow physics in compressors while being computationally cheap enough to be used for design. A particular challenge in this is to accurately predict the impact of the rotor tip clearance gap.In this thesis the aim has been to validate both simplied and detailed CFD models with experimental data on a low-speed axial compressor researched within the LEMCOTEC project. The main focus has been to determine the models ability to predict the compressor characteristics and in particular to capture the eects of the tip clearance. The results show that the overall compressor performance is best predicted with the CFD models that does not resolve the tip clearance gap. The models resolving the tip clearance gap seems to exaggerate its impact, more so with the simplified model.

Ort, förlag, år, upplaga, sidor
2016. , s. 54
Nyckelord [en]
Technology
Nyckelord [sv]
Teknik, CFD, validation, tip clearance, compressor, jet engine
Identifikatorer
URN: urn:nbn:se:ltu:diva-43216Lokalt ID: 11a05e00-98ac-4bfc-8fa5-53b3af111b6fOAI: oai:DiVA.org:ltu-43216DiVA, id: diva2:1016445
Externt samarbete
Ämne / kurs
Examensarbete, minst 30 hp
Utbildningsprogram
Civilingenjör, Teknisk fysik och elektroteknik
Examinatorer
Anmärkning
Validerat; 20160701 (global_studentproject_submitter)Tillgänglig från: 2016-10-04 Skapad: 2016-10-04Bibliografiskt granskad

Open Access i DiVA

fulltext(2363 kB)300 nedladdningar
Filinformation
Filnamn FULLTEXT02.pdfFilstorlek 2363 kBChecksumma SHA-512
1039c1e7acc44777dbf79cde72ebae42d610c378d650df4c31f92f75de723d0062a4b2ff0e5d273be5e708c8036b47bf3ecf7829c7e42d19381fd2f69e19faf5
Typ fulltextMimetyp application/pdf

Sök vidare i DiVA

Av författaren/redaktören
Åhman, Joakim

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 300 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: 243 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • 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