Czech_Tech_Univ_Radial_Trubine

AGT-POWERBasedPredictiveAGT-POWERBasedPredictiveRadialTurbineModel(Pt)(Progressreport)JanMacekOldřichVítekJánBuričJanMacek,OldřichVítek,JánBuričCzechTechnicalUniversityinPrague,JosefBožekResearchCenterJosefBožekResearchCenterOverviewofPresentation1.Introduction2.Toolsfor1-DSimulationofaRadialTurbine3Applicationof1DModulestoInTurbineFlow3.Applicationof1-DModulestoIn-TurbineFlowSimulation4.Calibrationofa1-DTurbineModel5ExamplesofResults5.ExamplesofResults6.ConclusionandProspectsGoals:Tosimulateinteractionbetweenexhaustpressurewavesandaturbinepressurewavesandaturbine.Toextrapolateaturbinemapkeepingphysicalmeaningofit.21.Introduction:State-of-the-ArtAttttdibttbi•Attemptstodescribepressurewavesataturbine(orcompressor)since1960’stopresent:simple,schematicmodelsusing“1D”centralstreamlinew/og/realisticgeometry.•“1D”centralstreamlinesteadymodeldevelopedandsuccessfullycalibrated(SAE2002SAE2008)andsuccessfullycalibrated(SAE2002,SAE2008)•Measurementsatmodelturbinepulsatortestbedsordirectlyatanengine-useofresultswithuseofresultswith/lti?/lti?mass/energyaccumulation?mass/energyaccumulation?•Toolsfor3-DCFDsimulations–timeandcomputertimeandcomputercapacitycapacityrequirementrequirementss.capacitycapacityrequirementrequirementss.•Toolsfor1-Dsimulations(nearly)readyforapplication(SAE2008).31.Introduction:MotivationhNeedformoreaccurateturbinemodelbasedIntroductionIntroductionToolsfor1-DSimulationofaRadialTurbineApplicationof1-DhNeedformoreaccurateturbinemodelbasedonexperimentssuitableforengine/TCsimulationandmatchingandnaturalApplicationof1DModulestoIn-TurbineFlowSimulationCalibrationofa1-DTurbineModelRltTURBINEPARAMETERS=f(degCA)111.2;3gextrapolationofaturbinemap(basedonphysics)tohighpressureratios(supercritical)andwiderangeofbladespeedratio(lowResultsConclusionandProspectsmm1206gineBoreNumberofcylinders080.911.1iciencyetaT;efficientmuT;tiox=u/cs]1522.5tiopiT[1]andwiderangeofbladespeedratio(lownumberofcylindersperamanifoldbranch).Diabaticturbinemodelling.r.p.m.2000Turbochargerspeedr.p.m.90000degCA10.2TurbinestatordegCA8.2TbitdCA21Manifoldelayofpress.waveassageEngEnginespeed0.60.70.8sentropicEffiischargeCoeVelocityRat[10511.5PressureRatetaTu/cshTimescalesofturbineunsteadiness:large(transientresponse),medium(exhaustpressurewaves)small(impellerchannelTurbinerotordegCA2.1degCA33.7TurbinerevolutiondegCA8.0TurbinestatordegCA27.1TurbinerotordegCA68ManifoldDepwpaDelayofflowsinglepassage0.40.590180270360CrankAngle[degfromCTDC]IsDi00.5PetaTu/csmuTpiTpressurewaves),small(impellerchannelpassage).hMediumscalesshouldbeaddressed.TurbinerotordegCA6.8fHeislerEngineTechnologySAE1998CrankAngle[degfromCTDC]4Mediumscalesshouldbeaddressed.Heisler,EngineTechnology.SAE19981.Introduction:MotivationhNeedformoreaccurateturbinemodelbasedIntroductionIntroductionToolsfor1-DSimulationofaRadialTurbineApplicationof1-DNlidVlitMfRdilTbihNeedformoreaccurateturbinemodelbasedonexperimentssuitableforengine/TCsimulationandmatchingandnaturalApplicationof1DModulestoIn-TurbineFlowSimulationCalibrationofa1-DTurbineModelRltNormalizedVelocityMapsofRadialTurbine1.01.1RadialTurbineatHighPressureRatioOptimumVelocityRatio0.901.20simulationandmatchingandnaturalextrapolationofaturbinemap(basedonphysics)tohighpressureratios(supercritical)ResultsConclusionandProspects0.80.9Efficiency1]1.01.1efficient[1]0800.85nd0801.00ExitMachpy)gp(p)andwiderangeofbladespeedratio(lownumberofcylindersperamanifoldbranch).0.60.7IsentropicEetanom[0.91.0schargeCoemuTnom[0.750.80icEfficiencyancityRatio[1]0.600.80icient;Nozzleumber[1]0.40.5ormalizedIetaT/0.80.9RelativeDismuT/m0.70IsentropiVeloc0.40schargeCoeffiNuu/csoptetaTmax0.20.30600080010001200140016001800No0.70.8R0.600.651520253035400.000.20DismuTnomNozzleMach#50.6000.8001.0001.2001.4001.6001.800NormalizedBladeSpeedRatiox/xnom[1]1.52.02.53.03.54.0PressureRatiopiT[1]1.Introduction:MotivationhMflibltbidlfIntroductionIntroductionToolsfor1-DSimulationofaRadialTurbineApplicationof1-DhMoreflexibleturbinemodelfordifferentlayoutswithintegratedboosttlEGRitbltdiApplicationof1DModulestoIn-TurbineFlowSimulationCalibrationofa1-DTurbineModelRltcontrolorEGRsuitableatmediumtime-scaleaccuracy.ResultsConclusionandProspectshTwin-scrollwithpressurewaveshiftandassymetryduetoscrolldesign,WGinlet,hIntegratedWGchamberoroutletdiffuser.etc.61.Introduction:MotivationhMflibltbidlfIntroductionIntroductionToolsfor1-DSimulationofaRadialTurbineApplicationof1-DhMoreflexibleturbinemodelfordifferentlayoutswithintegratedboosttlEGRitbltdiApplicationof1DModulestoIn-TurbineFlowSimulationCalibrationofa1-DTurbineModelRltcontrolorEGRsuitableatmediumtime-scaleaccuracy.ResultsConclusionandProspectshDifferentvariablegeometries.hOutletdiffuserwithunsteadyflow.7IntroductionToolsfor1Toolsfor1--DDSimulationofaSimulationofaRadialTurbineRadialTurbineApplicationof1-DMdltI2.Toolsfor1-DSimulationofaRadialTurbineModulestoIn-TurbineFlowSimulationCalibrationofa1-DTurbineModelResultsaRadialTurbine„Modulesandsolversfor1-D“Pipe”withvariablecross/sectionarea,sourcetermsforenthalpyandResultsConclusionandPro