Vasculature Optimization of Actively-Cooled Materials Aerospace Engineering

106 Pages·2016·3.53 MB·English

by  Andre C. Marta

Vasculature Optimization of Actively-Cooled Materials
Gonçalo Ferreira Nunes Gouveia Valente
Thesis to obtain the Master of Science Degree in
Aerospace Engineering
Supervisor(s): Prof. Alejandro M. Aragón (TU Delft)
Prof. André Calado Marta (IST)
Examination Committee
Chairperson: Prof. Filipe Szolnoky Ramos Pinto Cunha
Supervisor: Prof. André Calado Marta
Member of the Committee: Prof. João Orlando Marques Gameiro Folgado
June 2016
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Dedicatedtomybelovedfamilyandfriends
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Acknowledgments
First and foremost, I would like to thank my supervisors Professor Alejandro M. Arago´n and Professor
Andre´ Calado Marta, the first for the guidance and support that allowed me to reach as far as I did in
this project, the second for the constant feedback and interest in the project and this document as well
asinmyconcerns,andbothfortheirpatienceduringthemonthsittookmetocompletethisthesis.
Next, I would like to thank the TU Delft university and more specifically the Mechanical, Maritime
andMaterialsEngineering (3mE)Departmentforprovidingmetheresearchtopicandtheinfrastructure
neededforthisproject. Thefeedbackprovidedinmyprogresspresentationswasalsoveryhelpful.
IwouldalsoliketothankmylabmatesatTUDelft forbeingsupportiveandalwaysupforabrainstorm
sessionthathasalwaysbeencrucialinsolvingtheissuesthatappearedduringthecourseofthiswork.
Finally, I would like to thank all my friends and family for their love and support ever since I needed
it. Their help has been important for my entire academic path but the remote support over the last few
monthsofcompletingthisthesiswascrucial.
Withoutthehelpandsupportfromthisbiggroupofpeople,thisprojectandmyacademicpathwould
nothavebeenpossible. Thankyoueveryone!
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Resumo
Com a vontade de explorar todas as possibilidades do imagina´rio da humanidade surgiu o mundo da
engenharia. Emaplicac¸o˜esdeengenhariaondeosprocessosdetransfereˆnciadecaloresta˜opresentes
surgemosmateriaisvascularesarrefecidosactivamente,quefornecemmotivac¸a˜oparaestatese.
O objetivo deste trabalho e´ implementar as ferramentas necessa´rias para modelar e optimizar
problemas de transfereˆncia de calor conjugados (o calor dispersa-se pelo dom´ınio na˜o so´ atrave´s de
conduc¸a˜omastambe´mdeconvecc¸a˜o).
Comodesejodeumaimplementac¸a˜oindependentedaconfigurac¸a˜odoscanaisassociadoaopro-
cessodeoptimizac¸a˜o,e´ necessa´rioencontrarumasoluc¸a˜odediscretizac¸a˜oinovadora,te´cnicaquefoi
encontradanoInterface-enrichedFiniteElementMethod.
Asequac¸o˜esquedefinematransfereˆnciadecalornasduasfasesdemateriaisvascularessa˜odifer-
entes. Nas regio˜es dominadas por convecc¸a˜o, as formulac¸o˜es de elementos finitos padra˜o sa˜o inefi-
cazesee´ necessa´rioencontrarumasoluc¸a˜odiferente,tendo-seescolhidooStreamlineUpwind/Petrov-
Galerkin.
EstandointegradosnumgrupodetrabalhonaTUDelft,todososaspectosdeimplementac¸a˜ofazem
partedeumaferramentacomputacionaldesenvolvidapeloreferidogrupo(hybrida).
Seguindo as premissas acima, foi poss´ıvel comparar resultados com testes de verificac¸a˜o para os
me´todosdiscutidosetambe´moptimizargeometriasvasculares,minimizandoatemperaturamaximano
seudom´ınio.
Usando a abordagem e resultados descritos, foi poss´ıvel concluir que o trabalho desenvolvido re-
sultou na aplicac¸a˜o correcta de cada me´todo e tambe´m que a sua combinac¸a˜o e´ eficiente e eficaz na
modelac¸a˜o e optimizac¸a˜o de problemas de transfereˆncia de calor conjugados definidos por dom´ınios
vascularesarrefecidosactivamente.
Palavras-chave:
Interface-enrichedFiniteElementMethod,StreamlineUpwind/Petrov-Galerkin,
Convecc¸a˜odeCalor,Optimizac¸a˜o.
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Abstract
Associated with an eagerness to explore every possibility from humankind imagination came the field
of engineering. In engineering applications where heat transfer processes are present arise vascular
actively-cooledmaterials,whichprovidemotivationforthisthesis.
The goal of this work is to implement the tools required to model and optimize conjugated heat
transferproblems(heatdispersesthroughthedomainnotonlyvia. heatconductionbutalsoconvection).
Inordertoobtainanimplementationthatisindependentoftheconfigurationofthecoolingchannels
(important for the optimization process), an innovative solution for the discretization method is in order,
whichcanbefoundintheInterface-enrichedFiniteElementMethod.
The equations that define heat transfer in the two phases of vascular materials are different. In the
convectiondominatedregions,thestandardfiniteelementformulationsareineffectiveanditisnecessary
tofindadifferentsolution,beingtheStreamlineUpwind/Petrov-Galerkintechiquethechosenone.
BeingdevelopedinaworkgroupatTUDelft,allimplementationaspectsareintegratedinhybrida,a
computationaltooldevelopedbysaidgroup.
Following this procedure made it possible to match results with verification tests for the discussed
methodsandalsotooptimizevasculargeometriesbyminimizingtheirmaximumdomaintemperature.
Using the approach and results described above, it has been possible conclude that the developed
work resulted in the correct implementation of each method and also that their combination is effective
and efficient modeling and optimizing conjugated heat transfer problems defined by vascular actively-
cooleddomains.
Keywords:
Interface-enrichedFiniteElementMethod,StreamlineUpwind/Petrov-Galerkin,Heat
Convection,Optimization.
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