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1、(c)l999AmericanInstituteofAeronautics&AstronauticspentalMeasurementofVenturiDischargeCoefficientlncludigSensitivitytoGeometricandFl(~wQualityVariablesD.K.Be&pXxhnology,Inc.,AEDCGroupArnoldEngineeringDevelopmentCenterArnoldAirforceBase,Tennessee3738937t~hAOAAAerospaceSciencesM
2、eeting81ExhibitJanuary11-14,1999/Reno,NVForpermissiontocopyor&publish,contacttheAmericanInstituteofAeronauticsandAstronautics1801AlexanderBellDrive,$uite500,Reston,VA22091(c)l999AmericanInstituteofAeronautics&AstronauticsAIAA-99-0304ExperimentalhleasurementofVenturiDischargeC
3、oefficientIncludingSens/tivitytoGeometricandFlowQualityVariables*D.K.BealetSverdrupTechnology,Inc.,AEDCGroupArnoldEngineeringDevelopmentCenterArnoldAirForceBase.TN37389BIbstractFnNetthrust,IbfFsScaleforce,IbfTheArnoldEngineeringDevelopmentCenter(AEDC)initiatedan~airflowmeasur
4、ementtech-MACHLocalMachnumberintheventuricoreniqueinvestigationtoaddressturbineenginetestflowbasedonlocalstaticpressureandrequirementswithresbecttobothairflowmeasure-inlettotalpressurermentaccuracyandcosts.TheeffortencompassedPaAmbientpressure,psiadevelopmentofaresearchtestce
5、lltoserveasanairflowcalibrationfacilityandtestingofaseriesofPsStaticpressure,psiaventurimodels.TheexperimentsincludedarepeatPTLocaltotalpressureintheboundaryofexperimentsconductedIn1961thatformthelayer,psiabasisfortheEngineTestFacility(ETF)criticalflowventuriflowcoefficients.
6、Thetestsprovidedaverifi-PTINFFree-streamtotalpressureasmeasuredcationoftheoriginalmeasurementssubstantiatingintheplenumchamber,psiathecurrentAEDCflowcoefficients.Inaddition,theREYVenturithroatReynoldsnumber.Rey-experimentsincludedaparametricinvestigationofnoldsnumberbasedonth
7、roatflowcondi-venturiflowcoefficientsensitivitiestoflowquality,tionsandthroatdiameter.geometric,andinstallationparameters.Thesesen-sitivitiesprovidedinformationforevaluatingairflowRHODensity,Ibm/cubicft.measurementaccurhcyprovidedbyventurisFitVenturithroatradius,in.installedi
8、nETFtestfacilities.l-rTotaltemperatureasmeasuredinple-Norhenclaturen
