Data Oscillation Resolution Of Propellant Flowmeter Used .
Data OscillationResolutionof PropellantFlowmeterUsed in nTD72/JohnnyTD61/MaryTD63FFomTD52/GaryHeflinBeth ryby2000
TABLEOFCONTENTSTitlePageList of FiguresList of onInitial,.)3of ProblemFacility7ConfigurationInvestigation9LOX ColdLOX ColdFlow Test ConfigurationFlow Test Results10RP- 1 Cold Flow Test ConfigurationRP-I Cold Flow Test Results13TestingTesting15ResultsResults1114with Stellar Transducerswith dations2728References31AppendixA - HTF RP-1V-ConeValidationTestProcedureAppendixB - HTF RP-1V-ConeValidationTestConfiguration
LISTOFFIGURESTitleFigurePage1PR- 1 FlowmeterFlow6Rate4Initial5Initial HTF V-ConeFlowmeterConfigurationPTA- l LOX FlowmeterConfigurationPTA- 1 LOX FlowmeterTest 29Comparisonof MeasuredLOX Flow RatesHTF RP- 1V-ConeValidationTest 11310HTF Test15111 First PressureSetting1612HTF Test 1 ThirdHTF RP- 1V-ConePressureSettingValidationTest11713Poor Responseof Filter SnubberHTF RP- 17RosemountDelta PressureTransducerHTF RP- 1V-ConeValidationTest ommendedHTF RP- 1 FlowmeterResponseof Filter SnubberSnubberon HTF RP-IV-ConeFlowRate20Test21Level22Validation23Test 42425and es1 RP- 1 Flowmeter2629Configuration30Configurationof TablesTitle2OscillationShift CurveTablePTA-119DataList!Test 4DataZero ShiftHTF RP-IV-ConeValidationPage3Data27ii
ACRONYMSGOXFFFFGaseousOxygenHorizontalTest genMSFCMarshallParameterPIDmass per secondSpace FlightidentificationCenterPsiaPSIDPoundsper squareinch absolutePoundsper squareinch differentialPTA-IRP-1PropulsionRPMRocketTest ArticlePropellantSnubber TypeEARevolutionsAir serviceSnubberEHHeavySnubber TypeELSnubberSSCEWLight oil serviceWater 1per minuetoil serviceSpacecomputerCenterprogramto plot data 111
SUMMARYTheStennisSpaceCenters"horizontaltest facility,MarshalSpacepropulsiontest article and the X-34 flight vehicle are designedfor measurementof both RP-I and LOX flow rate ,, for Fastracpressuretransducerdatafrom thesemixture ratio in the Fastractransducershave excessiveflowmetersdatafluctuationsthat interferedcalibratethe RP- 1 and LOXmixturewith makingratio requiredthe RP- 1 and LOXflowmeteroscillationsthe accuratefor FastracThe objectiveof this report is to documentthe flowmetermethod used to obtain more reliable flowmeterdata.delta pressurehave causedreadingsengineof work(HTF)Theincludestest configurationsand the ationamplitudepressuredata oscillationproblemin the HTF LOXin the PTA-of Stellar1 LOXThemost reliabledeltaflowmetera Stellarflowmeterusing a Stellarand Rosemountwith a StellarLOX flowmeterdataPSID. The oscillationusingdatadeltaLOXand thetest facility(SCC).is 2 to 5 PSIDpressuretransducer.is 4 to 7 PSIDpressureat aTheat a erdatadeltadelta pressurepressureSpacetoflowmeters,testing.Theon both the horizontal(PTA- 1) at Stennisof 2.5 PSIDof 3.9 PSIDwith out snubbers.EA snubberamplitudepressuredifferentialA combinationtest articleconductednecessaryoperation.The scope of work covered by this report is the LOX and RP- 1 feedlinefilters and delta pressuretransducerdata used to support Fastrac enginescopeCenters',, ith V-Cone flowmetersengine te:,ting.Deltaare used to calibrateengine.Data from the V-Coneoscillation.The delta pressureflowrateFlightweretesteddata was obtainedThe oscillationwith andwile usingamplitudewas reduced to 0.3 PSID at a mean differentialpressureamplitudein PTA-I LOX flowmeterdata was reduceda typein HTFof 2.5to 0.5 to 2PSID at a mean differentialpressureof 4.5 PSID. The sense lines were long enoughensure that GOX (from ambientheat transfer)was at the snubberlocation.The approximatea meandifferentialA - 1 flowmeterto 0.2 PSIDPTAsensedataThePTA-Iwas obtaineddifferentialdataPR-!to reduceHTF RP- I flowmeterusingThe oscillationat a meanline portsof 2 PSIDpressurewas reducedlines wereconfigurationsof 1.5 PSID.effectsprimedof Stellarweretested.dataThe oscillationpressurewith RP- 1 priorwas reducedpressureinofto the flowmetermeasurement.to test.reliabletransduceramplitudedifferentialkept horizontalon the deltaand RosemountThe mostdelta pressureat a meanlines were1 to 2 PSI/)transducer.in HTF RP- 1 flowmeterto 0.2 PSIDsenseks fromdelta pressureusing a Rosemountamplitudeflowmeterflowmetertypes of snubberswhileany elevationsensea Stellarwith severalwith different1 RP- 1 flowmeter3.3 PSID.in the HTF RP-1in conjunctiontransducerswith out a snubber.amplitudetoTheat
INTRODUCTIONThe Fastrac Engine is undergoingthe horizontaltest facility (HTF)and owrateEngines.have experiencedoscillationswith makingcauseaccurateratio of the Fastracwas identifieda series of tests at Stenni Space Center (SSC) on bothand the propulsiontest article (PTA-I).The SSC HTFfeed systemflowrateoscillations.flow readingsEngine.as a constraintpressurewhichA methodfor testingoscillations.The oscillationsare requiredof reliablyon both PTA-lTheseflowrateto calibratemeasuringfeedthe RP-1steady-stateand HTF Fastracto
DESCRIPTIONThe SSC HTF facility.flowmetersMSFCare differentialtestingon HTF and coldPROBLEMfliehtsysteman accuratepressure-typepressureand the oscillationmean differentialpressure of 2 PSID.oscillations[2]seen in the HTF LOXLOXTableis 2 to 5 PSID1at a meanPTA-1TestIHe Flow Test0 PSIDnoiseTableaboutamplitudeshownpressureatP10.5 PSID2 PSIDnoisedeltaat0.2 PSID15 PSIDdeltaP0 PSI D deltaRP-1 TankingTest # 10.9 PSIDnoiseatMin. noise14 PSIDdeltaPPSIDRP-1 TankingTest # 20.65TankingTestHe Flow TestMin.1 PSIDTankingElectricalLOXTestDiagnosis TestLOX & measuredwere[2] seendeltaobservedonin the HTFhere is fromRP-11 to 2 PSIDat ain.45 PSIDnoise atPPMin.PSIDdelta(PID6614)Min.Min.noisenoiseMin.at 0deltanoisePSIDPPSIDat 0Min.deltaPnoisePSI D deltaPSI D noise.1 PSIDdeltadeltaat Min.PnoisePSIDdelta6.9 PSIDnoiseatMin.noiseP3.9 PSIDdeltaPPSIDdelta.04 PSlDnoiseat 2'P0 PSIDnoisedeltanoiseFM4LOX0.12Pnoise1.4 PSIDFM3 (PID6635)RP-1at 0delta2 PSIDatatPat 1.1 PSID noise atP2 PSID delta PdeltadeltawhichPSIDat 0deltaP.03 PSID0 PSIDPSIDat 0noisePSIDPatPnoisedeltaat min noise2 PSIDdelta2.9 PSIDPTA-1noisedeltanoisePSlDFor initialpressureV-of 2.5 PSID.noiseLN2de;ices.the meanoscillations0.9 PSIDPTA-11 showsthe meanpressureFacilityValidation.06 PSlDtanks.1. the differentialFM2 (PID6605)HeliumdeltaPSIDflo ,mctersarcand KP-ITest DataFM1 (PID6604)Helium0.6 PSIDV-ConeLOXFigure 2 depicts the typical delta pressureflowmeter.The typical oscillationamplitudedifferentialFlowmeterwith V-ConeDuring these tests, there wasdata [ 1] which interferedwithflow rate.the typicalTheflow measurementof the oscillations1 depictsrl, .flow tests on PTA-steady-stateare desi nedtbr the PT.-\tmeasuredwith Stellar delta pressuretransducers.considerablescatter / oscillationin the flowmeterdetermining,.chicleand [,OXpressurizationflowmetershot-f'ueand X-34for measurementofbothRP-ialso used on the heliumConePTA1OFat 0PdeltaPmin noiseat 0JPSID deltaPminPSIDnoisedeltaMin.noisePSlDdeltaat 0Pat 0Patat 0Pat 0Pat 0Pat 0P3.8 PSIDnoise3.5delta PPSIDatMin. noise at 0PSID delta P0.03PSlDnoiseat .5 PSlDdeltaMin.at 0PSlDnoisedeltaPclipped at 6.68 & 0.01 PSlD noise at 0.02 PSID noise at 4 PSlD noise at- 6.7 PSID delta P 2.2 PSID delta P4.2 PSID delta P4.1 PSID delta P3P
Description--4 -b2f]h:i7.200622LS:Dof 16.50TIMEIN16.7517.0017.25SECONDSFigure 1FlowmeterData Oscillations4
Descriptionof Problem(continued)3PSID2%%3525I03O4PSIDJ2I.o-bi] ,75!.t .0014 .2514.5014 .75T: M S] CONDSLOXTIM]E IN15 .00IS.2515, 0IS.7§SI CONDSFigure 2FlowmeterData Oscillations5
DescriptionThe oscillationFigure 3. Thelevels[2]oscillationof Problem('continued)impact the accuracyin the calculatedflow rate as shown inlevel also mask the transientrespon. e i a the flov. rate data.Lbm/sec0 8TIMEN[2SECCN-Ci&T-Ref:00Figure 3CalculatedFlowA teamwas formedexperienceusersto resolvein systemsof the data.Theanalysis,the flow measurementunsteadyteam was taskedtechniquethat wouldprovideon PTA-1and HTF.The primaryof the oscillationsreliablebut to find a wayflows,200 3Rateissues.steady-stateto measureIt includedand instrumentation,with recommendingobjective28243C:00: 0.0001a flowflowratedatapersonnelas well as the endmeasurementfor both LOXof the team was not to determinethe flowwithwith the oscillationsand RP-1the sourcepresent.6
INITIALFiguresdelta4 and 5 depictpressurepressurethe initialtransducertransducersFACILITYsensewere usedV-coneCONFIGURATIONflowmeterlines for PTA-Ifor the deltainstallationand the routingand HTF respectively.pressuremeasurementS:cllaron all tests.1 flowmeterconfigurationis per MSFC drawing96M30110for RP-I.LOX. 96M30195for LOX Tank Helium pressurizationand 96M30199Helium pressurization.The HTF flowmeterconfiguration13018-LCT/PTA1 for RP- 1 and MSK- 132-0017-LCT/PTAbetweenspecifiedall of the V-Coneflowmetersand the Stellarof thedeltaThePTA-96M30135forfor RP-1 Tankis per SSC drawing MSK-1321 for LOX. The sense linesdeltapressuretransducerswereto be field routed.VIP2010RP-1LOX Flow5Flowi-'LV1P3010NLLOX"411 A- 1 RP-Filter"1"VIP3006(--V IP20064" PTA-IFeedlineiLOXFeedlineInitial PTA-1Figure 4V-ConeConfigurationFlowmeter7
Initial Facility Configuration T 3S03-LOAr v ,"2Flowill,TAFit1llJSect A-AElevationB uRP V-ConeV-Cone,FMFlow"!- NTA., ,'"Filteri/ l:. .: i ;ee21ineInitial//Transducer3S0 I-RPSectliltviewElevationB-BviewFigure 5HTF V-ConeFlowmeterConfiguration8
INVESTIGATIONTheapproachchosenfor evaluatingmeasurementtechniqueswasto runflow tests in both LOX and RP- l.the oscillationsseen in the V-Coneoscillationscouldbe removedcompromisingthe resultingThere were two approacheswas to install mechanicalby filteringsteady-stateto filteringfilters(eitherelectricallyor mechanically)in a tpurposes.of types(snubbers)dependingwas to replace(Rosemountconfigurationin the senseon the expectedthe delta pressuretransducer).(Stellarof coldwithoutflowrate data, then their objectivewould be met.the data that were assessed.The first approachlines.A snubberis a mechanicalfitting that has porous material in the fluid flow path. The porous materialinduces resistanceto the fluid and results in lower oscillationsin the data.comea seriesSe,,eral tests were conductedto identify and resol ,eflowmeterdata. The team decided that if thetransducerdensitytransducerIt was decidedwithoutof the sensedin the snubberSnubbersfluid. Thewith one that had built-into maintainfiltering)the originalas well for comparison
LOXInstrumentationCOLDmodificationsFLOWto PTA-1the first test, the PTA- I LOX flowmeterTESTflowmetersense lines were implemented.was configuredwith two additionaldelta pressure transducerssnubberfor vapor.is designedCONFIGURATIONForwith a type EA snubber along[3] as shown in figure 6.StellarA type EADeltaRosemontPDeltaPSnubberV ConePTA-IFM4Figure 6LOX FlowmeterConfiguration10
LOXThe resultsfor the LOX coldRosemountprovidedand the Stellaracceptabletransducershowedmeasurementsby tankSnubbedAvg.COLDflowdeltaaboutlevel in FigureresponseAs shownwith each7 below.configuredThe transienta 200 millisecondgoodTESTtest [4] are shownpressureoscillationshowedFLOWBoth thewith typeEA snubbersof the Rosemountin Figure8, bothother and with the flowratecalculated[4].Stellar 4.217SnubbedpsidWinP1otAvg.([6614] 0.085)Rosemont 4.172psid708] 0.062)([6649] 0.06)8v3i0.i0inPI t468 .214624PSID-2.2' StellarAvg.-4 32220--A-- -9*-32240TIMEB2F6P01232260 4.227psid32280323003232010:30AMSECONDSJune23. i00PTA-1 LOXFigure 7FlowmeterTest Results111999
LOX Cold Flow TestResults(continued)FTALoxFlowratesB2F PO!2.100--M--B2F6P012.100 r144TankLevelMethodAvg 134.0lb/sec14!Snubbed.iJ138Avg.L,,,Stellar 032300SECONDS8of MeasuredFlow RatesLOX12
RP-1The GUIL- TIONmorechallenging.Thedid not provideacceptableresultswith any of the measurementsconstraints,the cold flow testing was moved to HTF.The HTFtestsI [5,6,7].The deltawas also used to evaluatemeasurementconfigurations.flowmeterwere4 werewasinstallednot as accurate.procedureconductedwith differentto verifyFigureand configurationthetypesresults9 showsof snubbers,sincethethe configurationfor validationtestsinitialsenseto facilityvalidationline routing,andpressuremeasurementon theIn addition,a turbine typetanklevelgagesof validation1 throughtest on PTA-lused.DueRP-I V-Coneon thistestfacility1. The4 are in appendixtestingA.MinimalDP2venical fferentialr /SvTCThermcw.ouplePresstu' (I/8TransducerGND)l4 ft/ horizontalMinimalTubingVolume.SN5" VerticaltubingSN-""---XP3P' t""l,'FPRow---./"coupleP4 /A-.A5 ft Vertical.LHeightfromto I " p/]Feedline/orto test:----- /--' -lose couple/type',,.,/i"-. ', ,L"DP31ow4 " RP-IFeedlinefilter to ptameBleedValveFigureRP-1/lVHTFfilterSN r/AboveIX 1i4 III6 '" RP-i]To,o,.V-ConoII!1PrimeSN\ j (Closecouple)typeClose\P6I9V-Cone: 'alidation.,*',"Test113
RP-I COLD FLOWTheinitial RP- 1 coldflow test conductedon PTA-with a type EA snubber.This configurationIt is believedthat this was due to two effects.liquidlevelsAlthoughin the upstreamthese differencesTESTlevels! utilizeda Stellarpressuresideswereof the sensesmall,lines to the transducer.the magnitudeof the measureddelta pressureis small, so the change in elevationwas significant.Secondly,believedthat RP-1 reached the snubbersand wetted the surface (the snubberswerenot designeddownstreamfor liquidside of the deltathe sense line and the resultingthe test results.flow).pressureIf the RP-1wets the snubbersmeasurementmeasuredtransducerdid not yeild reasonabledelta pressure data.First, there were differencesin the RP-1and downstreamin liquidRESUI,TSpressure.differently,it isinstalledon the upstreamit effectsThe followingandthe resistanceparagraphsinsummarize14
TESTINGA Conethat was used on the PTA-TRANSDUCERSwith type EA snubberValidation1 coldTeston the V-Cone115]. This wasflow te t for both the LOXflowmeters.The oscillationlevels using the type EA snub rshowever unrealisticdata was observedafter the first flow test.at severalFigurepressureWITHwas used on HTF RP-1configurationV-Conereduced,RESULTSdifferent10 showstank pressurethat transientsettings.Dataflow rate changesfrom the first pressuretrackedthe turbinetheand the RP- 1were greatlyThe test wassettingflowmeterrunas shownindata.W/.IIPlg4Stellar with TypeEA Snubber onV-ConeFlowmeter0 to 5 is PSID600Turbine.Flowmeter0to 1000 is rpm5400FigureHTF Test101 First PressureSetting15
TestingResultswith StellarTransducers(continued)The deltadatapressure[5] as showndatafrom the third pressurein Figure1 I. The sensesettingdid not track the turbinelines were also observedflowmeterto hold pressureafterthe test system was vented.Data analysis showedthat the test set up allowed for a partialvacuum (2 PSIA) to be induced on the snubbersbetween pressure settings which duringthe next pressureinspectedcycleforcedRP- l into the senseafter the test and wereverifiedline.Thetype EA snubberswereto be wet with RP-1.Stellar with TypeEA Snubber 21FigureHTF Test1 Third11PressureSetting16
TestingResultswith StellarTransducers(continued)A Stellar delta pressuretransducerconfiguredwith t)pe EW snubber was used on the,filter for the HTF RP- 1 V-Cone ValidationTests I and 2. A type EW snubberisdesignedRP-I,for water.The filter snubbersThe oscillationlevelsusingwereprimedthe EW snubbersto ensure[5] werethat they wereagainreduced,wet withhoweverpoor and inconsistenttransientresponsewas observedin the data. The inconsistentfrom HTF RP-I V-ConeValidationTests 1 and 2 is shown in figures 12 and 13.dataStellar W/typeEW snubber-- --- b24h120.2004, 3305 .SO0HTF RP-1PoorFigure 12V-Cone ValidationResponseof FilterTests1Snubber17
TestingResults with Stellar Transducers(continued)Stellar W/typeEW snubberPSID9.40RPM0.-".'7.81.5OO?.&,I12110I-VFF RP-1GoodFigure13V-ConeValidationResponseof FilterTests2Snubber18
TestingA Stellarfilterdeltapressurefor the HTFfor light oil.RP-1.PSIDTheseStellarwith StellartransducerRP- I V-ConeThe oscillationwhichResultsconfiguredValidationfilter snubberslevelsTransducerswith type EL snubberTests3 and -1.A typewere also primedin typeEL snubbersis less than the unsnubbed(continued)to ensure[7] shownwas used on theEL snubberi ;designedthat they were wet within figure14 are around0.2configuration.TurbineW/typeFlowmeterEL snubberPSIDRPMFilterSnubberFigure 14on HTF RP-1ValidationV-ConeTest 419
Testing Resultswith StellarTransducers(continued)A Stellar delta pressure transducerconfiguredvith t2pe EH snubber was used on the VCone flowmeterfor the HTF RP- I V-Cone ValidationTests 3 and 4. A type EH snubberis designedwith RP-1.for heavy oil.The oscillationthe oscillationturbineresponseThese snubberswere again primed to ensure that they werelevels [7] observed,ere around 0.2 PSID which is similarlevel in a type EL snubber.and V-Coneis maskedflowmeterThe dataflow rate andby the oscillationfrom test 4 was used to calculatei5 shownin Figure15.wettotheThe transientlevel.Stellar W/typeEH igure15Flow Rate Data20
TESTINGA NTwithouta snubberTRANSDUCERSwasused on the RP- i filterduring the HTF RP- 1 V-Cone ValidationTe ts l & 2. A Rosemounttransducerwithout a snubber was also used on the V-Cone flowmeterV-ConeValidationtransducercaricaturerun tank.a snubberlevel[6] was acceptableof the Rosemountand is shownin figuredeltapressure16. Theof the data follows turbine flowmeterdata during pressurecycles of the RP- 1The calculatedflow rate from flow tests 3 and 4 show the V-Cone flowmeterflow rate withinUnsnubbedTest 3 & 4. The oscillationwithoutdelta pressureduring HTF RP- 12 IbmJsecof turbineflowmeterflow MDPT3S03-LO-9.5,570. 2f4h 121 200RosemountFigure 16Delta PressureOscillationTransducerLevel21
TestingTherewas one issue discoveredRP-1V-ConesnubberValidationwas mountedStellardelta pressurewhichis designedshowsgoodshiftResultsin the zeroTest 3, a Rosemountabovefor heavyTransducerswith the Rosemountthe V-Conetransducercorrelationwith Rosemountdeltabelowoils, was wever.transducerA type EH snubberthe flowmeter.at line pressureIn the HTFwithoutawas used on aThe type EH snubber,with RP-1 priorthe two delta pressurepoint of the transducer(continued)to the flow test.transducers[6], howeverFigurethere17is achanges.Type EH Snubber on Stellar,mountedbelow flowmeter& Primed--gt--- 6213PSIDDP2:DPT3S03-LO3PSIDt--e- 6222 PSIDDP3:DPT3S04-RP2Zeroshift at pressurechangesUnprimed Rosemountmountedabove flowmeter4010040200b2f4h121.40300200HTF RP-140400TIME405004060040700SECONDSFigure 17V-Cone ValidationTest322
TestingFigure 18 is a calculatedunusual zero-shiftcurvesenseResultswith RosemountTransducerszero-shiftcurve of the datawas observedthat has been(continued)[6] in figure17 above.attributedto elevationA veryeffects inlines.The sense lines were about ten feet in lengthseven feet above the V-Coneflowmeter.and the unsnubbedRosemountwas about0.10.05milr . -. j : .0i100120-0.05 Zero Shift-0.1 6213oo-0.15.O.2Line Pressure, pslaRosemountFigure18Zero ShiftData23
TestingResultswith RosemountTransducers(continued)The HTF RP-1 V-ConeValidation Tests4 usedanun,,nubbedRosemountanda type EHsnubberon a Stellardeltapressuretransducer,with both tran.,;ducersmountedbelowtheV-Coneflowmeter.The sense lines were short and primed with RP-I.Figure 19 showsless zero-shiftwith line pressurefor the Rosemounttransducer[7]. A greater dataoscillationwas observed 6213usingthe type EH snubberPSID DP2: DgI'3S03-LOcomparedto the type EL snubber.6222 PSID DP3: e EH Snubber1320013400TheHTF RP-1on StellarmountedbelowFM & Primed1360013800TIME SECONDSTIMEINFigure 19V-Cone Validation1400SECONDS14200Test 424
TestingResultswith RosemountTransducers(continued)Figure20 showsthatthecalculatedzero-shiftcurve [7] is lesserraticwith the senselinesshortenedandprimed in the HTF RP-1V-Cone Validation Test 4. As a result of theconfigurationchangefrom the previoustest, the calculatedrate[7] shown in figure 21 matchedthe turbine flowmeterDeltaV-Cone flowmeterflowflowrateto within 2 -Shift608010CLN . .I [9 to 999999 )20Curve25
TestingResultswith 50SQRT(([6213]-.043)*'2919,721b2 Rate58Lbm/sec565452Turbine5OFlowmeterFlowRate43I O1342C1344013460134813380SECONDSV-ConeTIMEIN SECONDS(T-Ref:Figure 21and TurbineFlowmeter1999 216 11:24:17.027)FlowRates26
CONFIGURATIONA summary2 below.Tableof the results2 Test Resultsfrom the flow tests conductedStellar[4,5,6,7,8]is summarizedin tableSummaryDelta Pressure TransducerStellar with out snubberRosemountSUMMARYwith out snubberwith EA nLow oscillationlevel,levelprimingwith RP-1reduces zero-shiftwith line pressurechanges.Low oscillationlevel in LOX system whensensoris ambienttemperature.Stellarwith EW snubberUnacceptableresponsewhen wet with tionlevel.Stellarwith EL snubberModerateStellarwith EH snubberMustRosemountwith EA snubberoscillationbe primedlevel.for RP- 1.High oscillationlevel.Must be primedLow oscillationfor RP-1.level in LOXsensoris henwet with RP-I.27
RECOMMBased on the seriesseveralof tests conductedrecommendations.use an unsnubbedelevationbetweento eliminateany possibleissuesduringnormaleffectsin RP- [ senseflow,it veryof RP- 1 flowrate,importantlevel.the deltathat sensorBecauseto attemptlines can be significantto pressurizethe flowmeterThe lines shouldbiasesto run pressuresbe orientedabove the V-Conetaps. The lines shouldsense line on both sides of each snubber.Figurelines.sense22 showsFigurelines.the recommended23 showssuchto removeshouldcan changeslowly,also be long enoughsources.It is alsowith pressure.if possible,It isso that a curveconditions.Thesensor with EAand sensorto assurefor the PTA-R P- 1 configurationlow delta-P'sall errorif not eliminated.that the snubbersRP- 1 configurationthe recommendedpressureof the veryof delta pressure vs. absolutepressurecan be generatedunder no-flowflowmeterteam recommendationfor LOX V-Conesis to use a Stellarsnubbers.team hassense lines should be short, with no changesinIn addition,the sense lines should be primedwith fluid liquidto be able to understandrecommendedthe investigation,For .TheV-Conetaps and sensor.measuredthereforeENDATIONSare slightlyGOX1 Flowmeteris in thesensefor the HTF Flowmeter28
Recommendations(continued). .g.RPV1P3010Mount Rosemontdelta Phorizontalto V-Cone& keepFlowminimal1 inchelevationdifferencebetween3"7Lportsand deltaof flowmeterosemountdelta-1RP V-Con /respectiveon flowmeterHmaximumP&P portsFM3V1P3006FLT3 "----/RP Filter' "4"RecommendedPTAExistingflexfinesRP FeedlineFigure 22PTA- 1 RP- 1 FlowmeterConfiguration29
Recommendations(continued)HTF RP V-ConeConfigurationV-Conr Le erPressure TransducerDPRosemountSect A-AElevation viewADP Rosemontmount belowv-co.eiOr'Stell ,filter,!L.'qAbovev-con ",q/-, ttype EHADP3 locate belowV-Cone to primeBleed Valve or bleedthrough "B" nuL typical 2 placesFigureRecommendedHTFRP-Prim e P3,4 "RPFeedline231 FlowmeterConfiguration30
REFERENCES1.Dataverifyis fromvariousrequirementsand Checkouttests conductedof the "LowRequirementsat SSC from 5/25/1999Cost 760,Test6/29,2/1999ArticleMarchto#1 Test2, 1999.2.Data is from the Fastrac engine test conductedat SSC on 5/14/1999per Test Request"H2b-2 GGFV Orifice Gains Test # 1," Test Number 0910-022-9134-HTF,5/14/1999.3."PTA14.Data is from test conductedTPS-BBM-324,6/22/1999.5."RP Flow Test with TurbineES# 270, 6/30/1999.6."HTF RP V-Cone282, 7/16/1999.ValidationTest7."HTFValidationTest 4," MSFC8."PTA RP And LOXES# 313, 8/16/1999.SnubberRP V-ConeAddition,"ES# 265, 6/16/1999.at SSC on 6/22/1999FlowmeterFlowmeterper "LOXon HTF Setup,"3 Configuration,"DeltaMSFCMSFCEngineeringP Configuration,"AndRP heetES#ES# 289,7/30/1999.EngineeringSheet31
APPENDIXHTF RP-1 V-CONEVALIDATIONATEST PROCEDURE
HTF RP cationfor all addedmeasurementsper typicalSSC verificationprocedures.VerifyClose-coupledPT at V-ConeProvidecopiesProvidePID list with measurementProvidecapabilityinlet is on SDASof SSC measurementto catchverificationlocationsand s.to MSFC.indicated.measurePhotographin detail, using digital camera,validationtest to include the following:and hi-speedRP dischargeall RP-Istaticfeedlinepressures,if available.and sensorssnubbers,to be ilter ressuresinstalledmeter,photographsof V-Cone,(Stellarfor validationupstreamto MSFCtest fromand snubbedsnubbers,filter to enginepressureswith senselines.senselinesorificeandthe and thermocouplefor inspection.by performingthe following:and F/D powered"on" and in "operate"mode,"zero" flow conditionfor 30 secondsusing Low speed data system.no flow, no purge or bleed and no valves cycled during operation.to characterizeHZ.coupledand Rosemount),and downstreamData on the Turbine Flowmeter-With turbinemeter connectedrecordEnsureclosenoisefloorsignalat the turbineand F/D convertergrounding,meter:Thisstability.input the followingsignalsinto the100 HZ, 200 HZ, 300 HZ, 400 HZ and 500(all at 100 mV amplitude)Recordeachon high speedand low speeddatasystems.Use "X 1 pulsefrom the Trig tek 303A F/D to high speed and the "DC output" fromspeed. Record approximately10 secondsfor each input frequency.Providethis datato MSFC.A-Ioutput"F/D to Lowis
PretestPrimethe turbineat ALL TIMESflowmeterto prevent(continued)prior to any pressurizingdamageto the turbinePrime/Bleedboth sides of the filter DP senselinesat the snubber and DP. (i.e. ensure the senselinesTestFill RP run tank to 2800 gallonsor flowoperations.SDASto fast speed1minimum.and start Hi-SpeedDAS(HSD).Open Prevalveslowly.Flow for 60 secondsClosePrevalveslowly.Switch SDAS to slow speed and HSDPressurizerun tank to 55 PSIA.SwitchSDASto fast speedOpenFlowPrevalveslowly.for 60 secondsClosePrevalveand HSDSwitchSDASoff.on.slowly.Switch to SDAS to slow speedPressurizerun tank to 70 PSIAto fast speedOpenFlowPrevalveslowly.for 60 secondsCloseClosePrevalverun tankCyclePrevalve.slowly.isolationand HSDand HSDoff.on.valve.Turn off data recording.This is the end of Test 1.InspectSwapand documentout V-ConeV-Coneand P2 Snubbersand P2 Snubbersas notedA-2liquidto ensure pure RP-1 and no gas presentare full of RP up to the DP sensor)Turn the SDAS on slow speed.Pressurizerun tank to 40 PSIA.SwitchEnsuremeter.for wet or dry condition.on Test 2 Configuration.
Test 2Fill RP run tank to 2800gallonsminimum.Turn on SDAS on slow speed.Pressurizerun tank to 40 PSIASwitch SDAS to fast speedandstartHi-SpeedDAS (HSD).OpenPrevalveslowly.Flow for 60 secondsCloseprevalveslowly.Switch SDAS to slow speedandHSD off.Pressurizerun tank to 55 PSIA.Switch SDAS to fastspeedandHSD on.OpenPrevalveslowly.Flow for 60 secondsClosePrevalveslowly.SwitchSDAS to slowspeedandHSD off.Pressurizerun tank to 70 PSIA.SwitchSDAS to fast speedandHSD on.OpenPrevalveslowly.Flow for 60 secondsClosePrevalveslowly.Closerun tank isolationvalve.Cycle Prevalve.Turn off datarecording.This is the endof Test 2.InspectanddocumentV-ConeandP2 Snubbersfor wet or dry condition. Do not altermechanicalor measurementsystemsetuppendingdatareview.Provideall datato MSFC for reviewA-3
HTF RP V-Cone Validation Test3Test 3 configurationNote:If ProofchangesPressurefrom Testtest (or anyturbine flowmeter)is required,Heflin at 256 544 1187.SwapPI with P2 & closeMoveDP2 (Rosemount)(volume)otherbleedcouplefrom2 configuration:test that will flow gas or RP-Ipressureoff very slowlyfilter to V-ConemountFM & use
mean differential pressure of 2.5 PSID using a Stellar delta pressure transducer. The oscillation amplitude in the PTA- 1 LOX flowmeter data is 4 to 7 PSID at a mean differential pressure of 3.9 PSID using a Stellar delta pressure transducer. A combination of Stellar and Rosemount delta pressure transducers were tested with and with out snubbers.Author: J. Heflin, M. Koelbl, M. A. Martin, T. Nesman, G. D. Hicks, Jim W. KennedyPublish Year: 2013
rocket engine and turbo-pump liquid propellant rocket engine. Typically, engines with small propellant quantities have a gas-pressurized propellant feed system, and large engines required weight considerations choose a turbo-pump propellant feed system. The startup and shutdown phases of a LPRE are very complex. The engine components are working
Identifying a forced oscillation is both a Detection and Estimation Problem. What needs to be detected and estimated - Detect: the presence of an oscillation - Estimated: Amplitude or mean square value (MSV or Power) of the oscillation Start time and duration of oscillation Frequency of the oscillation Possibly harmonics
oscillation is larger when the QBO of 30 months is more pronounced. Thus there is circumstantial evidence that this periodicity of the QBO is involved in generating the oscillation. The spectral analysis shows that there is a weak anti-symmetric 5-year oscillation in the zonal winds, which could interact with the large anti-symmetric A0 to
and no-oscillation hypothesis Two types of oscillation searches "Appearance" : Look for appearance of ν e Or ν τ in a pure ν μ beam vs L and E "Disappearance" : Look for a change in ν μ flux 5 Example: The ratio of the observed spectrum (points) to the no-oscillation hypothesis, and the best oscillation fit (solid) of T2K in Japan.
Spectral proper orthogonal decomposition and spatial cross-spectral analysis reveal the simultaneous emergence of a bubble-type vortex breakdown and a strong helical limit-cycle oscillation in the flow for S S c where S c D0:61. The oscillation frequency, f PVC, and the square of the flow oscillation amplitudes vary linearly with S S c. A .
by MIT known as "Cherry Limeade." Using the publicly available data on this propellant, we can calculate ideal chamber pressure and expansion ratio. Using this data we can calculate ideal motor properties. For our propellant, we know all the relevant constants: Propellant density: ρ p 1680g /m 3 Ratio of specific heats: k 1.21
optimizations of the propellant geometry, also known as the grain geometry. Optimization is an essential ingredient for the development of grain geometry. The grain, which is the propellant bulk, is developed when the requirements of the rocket are known. It is therefore needed to have a method that calculates
The themes of pilgrimage and welcome are central to The Canterbury Journey. A lasting part of its legacy will be the new free-to-enter Welcome Centre with dedicated community and exhibition spaces and viewing gallery. The journey to our new centre is underway, to open in 2019. A New Welcome In 2017, the face of the Cathedral has changed .
