NF C97-103-1990 声像录放.声音录放设备中速度波动的测量方法

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【英文标准名称】:TestMethodforSorptionofBibulousPaperProducts(SorptiveRateandCapacityUsingGravimetricPrinciples)
【原文标准名称】:吸水纸制品吸附作用测试方法(用重力原理测定吸附率和容量)
【标准号】:ANSI/ASTMD5802-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995
【实施或试行日期】:2001-10-23
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:纸;吸附;试验方法;纸加工;纸制品
【英文主题词】:Paper;Paperprocessing;Paperproducts;Sorption;Testmethods;Tests
【摘要】:Thistestmethoddeterminestheliquidsorptionofbibulouspaper,paperboard,andpaperproductsusinggravimetricprinciples.TheprocedureinthistestmethoddescribestestingofabsorbentmaterialssuchasthoseinSimilartestingmaybedoneoncompositeabsorbentproducts,incorporatingcelluloseandnonwovenfabrics,polymerfilms,orothersimilarmaterialsforusesuchasabsorbentpads,wipes,andsoonwithslightmodification.Thistestmethoddoesnotdescribetheapplicationofthistechniquetotextiles.Thestandardtestliquidisdistilledwater.Othertestliquidsofinterestmaybeusedifdesired,providedtheyarecompatiblewiththeliquiddeliverysystemspecified.Examplesofsuchtestliquidsinclude,butarenotlimitedto,bufferedsolutionsofdistilledwater,fruitorvegetablejuices,milk,syntheticbodyliquidssuchasurine,andorganicfluidssuchassaladoil,cookingoil,motoroil,andothers.Thetestliquidisdeliveredataneffectivenegativeheadpressureafterinitiatingliquidflow(wicking).Thisallowsthecontrollingsorptivepropertiestobedemandwettability,theabilityofthespecimentoabsorbthroughcapillarityandsurfacewetting.Usingtheequipmentandprinciplesdescribed,absorptionatotherinstrumentconfigurationsandheadpressures,aswellasdesorptionmaybemeasured.Thistestmethodmeasuresboththerateandcapacityofliquidsorptionthroughdemandwettabilityorwicking.Liquidcapacityisdefinedasthepointintheanalysiswherethesorptionratefallsbelow3.0mgin5s.Agreedintermediatepointsaremeasuredduringtheanalysistodeterminerate.Ananalogordigitalreportofthesorptivebehaviorofthetestspecimenmaybeproduced,ifdesired,tofurthercharacterizeitssorptivebehavior.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y30
【国际标准分类号】:85_060
【页数】:
【正文语种】:英语


Product Code:SAE AIR5686
Title:A Methodology for Assessing Inlet Swirl Distortion
Issuing Committee:S-16 Turbine Engine Inlet Flow Distortion Committee
Scope:This Aerospace Information Report (AIR) addresses the subject of aircraft inlet-swirl distortion. A structured methodology for characterizing steady-state swirl distortion in terms of swirl descriptors and for correlating the swirl descriptors with loss in stability pressure ratio is presented. The methodology is to be considered in conjunction with other SAE inlet distortion methodologies. In particular, the combined effects of swirl and total-pressure distortion on stability margin are considered. However, dynamic swirl, i.e., time-variant swirl, is not considered. The implementation of the swirl assessment methodology is shown through both computational and experimental examples. Different types of swirl distortion encountered in various engine installations and operations are described, and case studies which highlight the impact of swirl on engine stability are provided. Supplemental material is included in the appendices.This AIR is issued to bring together information and ideas required to address the inlet-swirl problem for which common industry practice has yet to be established. This document should foster the tests and analyses necessary to mature the ideas proposed by the committee to a recommended practice. These tests and analyses must include information that justifies three main features of the proposed swirl methodology: (1) swirl descriptors for correlating inlet swirl and stability pressure ratio loss, (2) computational techniques for analyzing compression systems (inlets, fans, compressors), and (3) test protocols (instrumentation and test techniques). The committee anticipates serving the industry by using such information to establish the consensus necessary for issuance of an SAE recommended practice.