【英文标准名称】:StandardTestMethodforEstimationofNetHeatofCombustionofAviationFuels
【原文标准名称】:航空燃料燃烧净热值的评价的标准试验方法
【标准号】:ASTMD4529-2001(2006)
【标准状态】:现行
【国别】:
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:航空燃料;试验;石油产品
【英文主题词】:aviationfuel;grossheatofcombustion;heatenergy;heatofcombustion;heatingtests;netheatofcombustion
【摘要】:Thistestmethodisintendedforuseasaguideincaseswhereanexperimentaldeterminationofheatofcombustionisnotavailableandcannotbemadeconveniently,andwhereanestimateisconsideredsatisfactory.Itisnotintendedasasubstituteforexperimentalmeasurementsofheatofcombustion(Note2).Note28212;TheproceduresfortheexperimentaldeterminationofthegrossandnetheatsofcombustionaredescribedinTestMethodsD240andD4809.Thenetheatofcombustionisafactorintheperformanceofallaviationfuels.Becausetheexhaustofaircraftenginescontainsuncondensedwatervapors,theenergyreleasedbyfuelinvaporizingwatercannotberecoveredandmustbesubtractedfromgrossheatofcombustiondeterminationstocalculatenetheatofcombustion.Forhighperformanceweight-limitedaircraft,thenetheatofcombustionperunitmassandthemassoffuelloadeddeterminethetotalsaferange.Theproperoperationoftheaircraftenginealsorequiresacertainminimumnetenergyofcombustionperunitvolumeoffueldelivered.Becausetheheatofcombustionofhydrocarbonfuel-mixturesareslowlyvaryingfunctionsofthephysicalpropertiesofthemixtures,theheatofcombustionofthemixturescanoftenbeestimatedwithadequateaccuracyfromsimplefieldtestsofdensityandanilinepointtemperature,withouttheelaborateapparatusneededforcalorimetry.Theempiricalquadraticequationforthenetheatofcombustionofasulfur-freefuelwasderivedbythemethodofleastsquaresfromaccuratemeasurementsonfuels,mostofwhichconformedtospecificationsforfuelsfoundinNote1andwerechosentocoverarangeofvaluesofproperties.Thosefuelsnotmeetingspecificationswerechosentoextendtherangeofdensitiesandaniline-pointtemperaturesaboveandbelowthespecificationlimitstoavoidendeffects.Thesulfurcorrectionwasfoundbyasimultaneousleast-squaresregressionanalysisofsulfur-containingfuelsamongthosetested.1.1Thistestmethodcoverstheestimationofthenetheatofcombustionatconstantpressureinmetric(SI)units,megajoulesperkilogram.1.2Thistestmethodispurelyempirical,anditisapplicableonlytoliquidhydrocarbonfuelsderivedbynormalrefiningprocessesfromconventionalcrudeoilwhichconformtotherequirementsofspecificationsforaviationgasolinesoraircraftturbineandjetenginefuelsoflimitedboilingrangesandcompositionsasdescribedinNote1.Note18212;Theestimationofthenetheatofcombustionofahydrocarbonfuelfromitsanilinepointtemperatureanddensityisjustifiableonlywhenthefuelbelongstoawell-definedclassforwhicharelationshipbetweenthesequantitieshasbeenderivedfromaccurateexperimentalmeasurementsonrepresentativesamplesofthatclass.Eveninthisclass,thepossibilitythattheestimatescanbeinerrorbylargeamountsforindividualfuelsshouldberecognized.TheJP-8fuel,althoughnotexperimentallytested,haspropertiessimilartoJP-5andJetAfuelsandcanbeconsideredinthesameclass.Theclassesoffuelsusedtoestablishthecorrelationpresentedinthistestmethodarerepresentedbythefollowingapplications:1.3ThenetheatofcombustioncanalsobeestimatedbyTestMethodD1405.TestMethodD1405requirescalculationofoneoffourequationsdependentonthefueltypewiththeprecisionequivalenttothatofthistestmethod.1.4Thevaluesstatedinacceptablemetricunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestab......
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:4P.;A4
【正文语种】: