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Numerical simulation of heat treatment using a coupled fluid and structure approach
2000 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

It is important to predict properties of manufactured components to ensure quality and reliability, especially in the aerospace engine industry. Some manufacturing processes affect properties in an undesirable way. It can for example be residual stresses or unwanted deformations of a component. This thesis is an initial study of how to numerical simulate the heat treatment processes and to predict the properties that affects the quality of manufacturing. There is a number of different ways to solve this problem. The tools used in this thesis are the Finite Element Method (FEM) and Computational Fluid Dynamics (CFD). The gas flow in the heat treatment furnace will be solved by CFD. This solution will be used to generate boundary condition for the FE-prediction of temperature and mechanical changes during manufacturing. The coupling between CFD and FEM will be done in an automatic way. In the commercial codes used there exists no coupling. A coupling has been implemented in the FE-program. The coupling will not be tight: i.e. no iteration of results between CFD and FEM will take place automatically. The method used is shown as an attractive way to solve a heat treatment problem by numerical simulation. Some needed improvements have been identified, mainly regarding the pre-processor in both CFD and FEM. An improved search algorithm in the developed user subroutine is identified for future work. In this thesis, the communication between the software for CFD and FEM is achieved by a FORTRAN user subroutine. This way of communication between the different software is not desired. A way to transfer results, not depending on the chosen software, would be preferable. Better knowledge of boundary conditions of the furnace has to be considered in more detail. Better boundary conditions would likely give a more accurate result. No experimental data has been available so there is no verification of the method and the simulation results. This is the first step towards a system for "smart" cooling.

Place, publisher, year, edition, pages
2000.
Keyword [en]
Technology, Numerical simulation, Heat treatment, Finite element method, FEM, Computational Fluid Dynamics, CFD
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-42489ISRN: LTU-EX--00/304--SELocal ID: 07f6bbf4-26b0-4047-8313-e3a31107ab9aOAI: oai:DiVA.org:ltu-42489DiVA: diva2:1015711
Subject / course
Student thesis, at least 30 credits
Educational program
Engineering Physics, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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