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1、NASATechnicalMemorandum107485AIAA–97–3041EvaluationofHeatTransferandThermalStabilityofSupercriticalJP–7FuelDianeL.LinneandMichaelL.MeyerLewisResearchCenterCleveland,OhioTimEdwardsWrightLaboratoryWrightPattersonAirForceBase,OhioDavidA.EitmanScienceApplicationsInternat
2、ionalCorporationFountainValley,CaliforniaPreparedforthe33rdJointPropulsionConferenceandExhibitcosponsoredbyAIAA,ASME,SAE,andASEESeattle,Washington,July6–9,1997NationalAeronauticsandSpaceAdministrationEVALUATIONOFHEATTRANSFERANDTHERMALSTABILITYOFSUPERCRITICALJP-7FUELD
3、ianeL.LinneandMichaelL.MeyerNationalAeronauticsandSpaceAdministrationLewisResearchCenterCleveland,Ohio44135TimEdwardsWrightLaboratoryWrightPattersonAirForceBase,OhioDavidA.EitmanScienceApplicationsInternationalCorp.FountainValley,CaliforniaAbstractofthecombustor.Aspa
4、rtoftheAirForceHypersonicTechnology(HyTech)program,theMaterialsandAeroAseriesofelectricallyheatedtubeexperimentswasPropulsionandPowerDirectoratesofWrightLaboratoryconductedtoinvestigatethepotentialofJP-7asacoolantareexaminingfuel/materialcompatibilityissuesforunderco
5、nditionsrelevanttoaMach8propulsionsystem.hydrocarbon-fueledMach8vehicles.VariousmetallicTheheattransfercapabilities,carbondeposition,andalloycandidatesforregenerativecoolingsystemshavematerialcompatibilityofJP-7atsurfacetemperaturesupbeenexamined,includingcommercials
6、uperalloysandto1700°F(927°C)weretestedin0.125in.diametertubesmoly-rhenium(MoRe)alloyswhichwerepreviouslyof304SS,Inconel617,Haynes188,Haynes230,andstudiedundertheNationalAerospacePlaneprogram.450/50Moly-Rhenium.TheheattransfertothecoolantwasmodeledwellbyaDittus-Boelte
7、rcorrelationatlowerAmajorconcernforhightemperaturehydrocarbonheatfluxes.Athigherheatfluxes,audibleinstabilitiesfuelsistheformationofcoke.Therearevarioustypesofwereobservedandcorrespondedtoasignificantcokethatcanbeformed,withthemostdeleteriousbeingenhancementinthecool
8、antheattransfer.Thecarbonfilamentous(catalytic)coke.5,6Filamentouscokeisformeddepositionratesinthesetestswerecomparabletothoseinbys
