Isogeometric Analysis in Industrial Turbomachinery...
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Isogeometric Analysis in Industrial Turbomachinery Applications Joint MSc-project by Motivation Isogeometric Analysis (IgA) is a recent methodology for the computational study of all types of engi- neering problems. It has been introduced in [Hu05] as a universal framework that aims at bridging the gap between geometry modelling in Computer-Aided Design (CAD) systems and finite element analysis (FEA) of fluid flow, structural mechanics and fluid-structure interaction problems. The essen- tial key technology that brings the two worlds, CAD and FEA, closer together is the common use of advanced Spline technologies to model complex geometries like the Turing-Mid-Turbine-Frame (TMTF), which is a performance-critical part of most modern aircraft engines (shown left), and to represent approximate solutions to, say, a computational fluid-flow analysis (shown right). As a major benefit, there is no more need of an irreversible approximate conversion of the accurate geometry parameterization into a discrete computational grid, which allows for much more effective shape optimization processes as they are needed in industrial turbomachinery applications. MTU Aero Engines located in Munich, Germany, is one of the world’s leading aircraft engine manu- facturers and services provides with state-of-the-art in-house development workflows. In the ongo- ing EU-funded MOTOR project, MTU has added novel adaptive Spline technologies into their work- flow, which gives much more flexibility in designing the shape of the TMTF flow passage (shown right), which in turn enables the design of more energy-efficient aircrafte engines.
Transcript of Isogeometric Analysis in Industrial Turbomachinery...
IsogeometricAnalysisinIndustrialTurbomachineryApplicationsJointMSc-projectby
MotivationIsogeometricAnalysis(IgA)isarecentmethodologyforthecomputationalstudyofalltypesofengi-neeringproblems. Ithasbeenintroducedin[Hu05]asauniversalframeworkthataimsatbridgingthegapbetweengeometrymodelling inComputer-AidedDesign(CAD)systemsandfiniteelementanalysis(FEA)offluidflow,structuralmechanicsandfluid-structureinteractionproblems.Theessen-tialkeytechnologythatbringsthetwoworlds,CADandFEA,closertogetheristhecommonuseofadvanced Spline technologies to model complex geometries like the Turing-Mid-Turbine-Frame(TMTF),which is a performance-critical part ofmostmodern aircraft engines (shown left),and torepresentapproximatesolutionsto,say,acomputationalfluid-flowanalysis(shownright).
Asamajorbenefit,thereisnomoreneedofanirreversibleapproximateconversionoftheaccurategeometryparameterizationintoadiscretecomputationalgrid,whichallowsformuchmoreeffectiveshapeoptimizationprocessesastheyareneededinindustrialturbomachineryapplications.
MTUAeroEngineslocatedinMunich,Germany,isoneoftheworld’sleadingaircraftenginemanu-facturersandservicesprovideswithstate-of-the-artin-housedevelopmentworkflows.Intheongo-ingEU-fundedMOTORproject,MTUhasaddednoveladaptiveSplinetechnologiesintotheirwork-flow,which givesmuchmore flexibility in designing the shape of the TMTF flow passage (shownright),whichinturnenablesthedesignofmoreenergy-efficientaircrafteengines.
ProblemdescriptionandchallengesThetaskofthismasterthesisistoparticipateinthejointdevelopmentofanIgA-solverforcompressibleviscousflowsandadvanceittoamaturitylevelthatenablesitsuseinindustrialturbomachineryapplica-tions.Asastartingpoint,aninviscidcompressibleflowsolverisavailablefromtheaforementionedMO-TORproject,withactivedevelopmenttakingplaceatTUDelftandLodzUniversityofTechnology,Poland.
Themaintasksofthismasterthesisareasfollows:
1. Familiarizationwith theconceptof isogeometricanalysisboth forgeometrymodellingandnu-mericalfluid-flowanalysisandacquirementofbasicknowledgeingasdynamics.
2. DevelopmentofperiodicboundaryconditionsintotheIgAflowsolverandperformanceofpre-liminary3DstudiesofcompressibleflowsthroughMTU’sdemonstratorTMTFflowpassage.
3. Extensionofthe3DNavier-StokesIgA-solvertoarotatingframeofreference,whichisrequiredtomodeltheflowbehaviorinrotatingenginepartsupstreamanddownstreamthestaticTMTF.
4. CouplingofthestaticNavier-StokesIgA-solverwithitsrotatingcounterpartandperformanceofpreliminary3DstudiesofcompressibleflowsthroughMTU’sdemonstratorTMTFflowpassage.
Possibleadditionaltask:
5. TheutilizedsoftwarelibraryG+Smo[GS]providesstate-of-the-arttechnologiesforgeneratinglo-callyrefinedB-splinesbases,so-calledtruncatedhierarchicalB-Splines(THB-Splines)[Gi12].Up-onsuccessfulcompletionof theaforementionedmain tasks, theuseofTHB-Splinescanbeex-ploitedtoimprovethegeometryandsolutionrepresentationbyrefiningtheSplinespacelocally.
Themainchallengesofthisambitiousmasterprojectconsistinthebleeding-edgenatureoftheutilizedtechnologiesbeingunderactivedevelopmentandthenecessarymaturity levelof the IgA-solver that isrequiredforbeingabletosolvechallengingindustrialturbomachineryapplicationsofthistype.
TimescheduleTheprojectiscarriedoutinstrongcollaborationwithMTUAeroEngines,Germany.Thestudentisexpectedtostaypartoftheprojecttime(rangingfrom2weeksto3months)atMTUinMunich.
ContactFormoreinformationaboutthisMSc-projectcontactDr.MatthiasMöller([email protected])orDr.DavidGrossmann([email protected]).
Literature[Gi12] C. Giannelli, B. Jüttler, H. Speleers. THB-Splines: The truncated basis for hierarchical
splines.ComputerAidedGeometricDesign29(7),pp.485-498,2012.
[GS] G+Smo(Geometry+SimulationModules).https://www.gs.jku.at/gismo.
[Hu05] T.J.R.Hughes,J.A.Cottrell,andY.Bazilevs.Isogeometricanalysis:CAD,finiteelements,NURBS,exactgeometryandmeshrefinement.ComputerMethodsinAppliedMechan-icsandEngineering194,pp.4135-4195,2005.
