SAE AS127 Propeller Shaft End, Flanged Type - No. 1, 2, 3, 4, 5, & 6
作者:标准资料网 时间:2024-05-16 14:42:27 浏览:8365
来源:标准资料网
Product Code:SAE AS127
Title:Propeller Shaft End, Flanged Type - No. 1, 2, 3, 4, 5, & 6
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:No scope available.
基本信息
| 标准名称： | 旋启式止回阀阀瓣密封圈压板 |
| 中标分类： |
机械 >>
通用零部件 >>
阀门 |
| 替代情况： | 该压板在阀门产品上不是连接和配合部件，可由各厂家自行确定形状与尺寸 |
| 发布部门： | 机械电子工业部合肥通用机械研究所 |
| 发布日期： | 1991-07-22 |
| 实施日期： | 1992-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2008-01-23 |
| 归口单位： | 机械电子工业部合肥通用机械研究所 |
| 出版日期： | 1900-01-01 |
| 页数： | 2页 |
适用范围
本标准规定了旋启式止回阀阀瓣密封圈的结构型式、尺寸和技术要求。
前言
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目录
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引用标准
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所属分类： 机械 通用零部件 阀门
【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】:
