【英文标准名称】:Spacesystems.Unmannedspacecraft.Estimatingthemassofremainingusablepropellant
【原文标准名称】:太空系统.无人驾驶飞船.剩余可用推进剂的质量估算
【标准号】:BSISO23339-2011
【标准状态】:现行
【国别】:英国
【发布日期】:2011-07-31
【实施或试行日期】:2011-07-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Aerospacetransport;Definitions;Estimate;Estimation;Fuels;Spacetransport;Spacevehicles;Spacecraft;Specification(approval);Unmanned
【摘要】:
【中国标准分类号】:V72
【国际标准分类号】:49_140
【页数】:16P;A4
【正文语种】:英语


【英文标准名称】:Industrial-processcontrolvalves-Part8-1:Noiseconsiderations-Laboratorymeasurementofnoisegeneratedbyaerodynamicflowthroughcontrolvalves
【原文标准名称】:工业过程控制阀.第8-1部分:噪声的考虑.气动流流经控制阀产生的噪声的实验室测量
【标准号】:IEC60534-8-1-2005
【标准状态】:现行
【国别】:国际
【发布日期】:2005-09
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC65B
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;声音传播;校正装置;空气(载)声;流体工程;气体流动;过程测量和控制技术;噪声测量;声音;空气动力学;声级;空气噪声测量;控制阀;流量率;阀门;空气噪声;流量;声压级;辐射;空气动力流;实验室;数字的;实验室试验;过程控制;噪声辐射;管道;噪声;燥声特性;测量;声学测量;额定值;定义;尺寸选定;测量技术;方向控制阀;电气工程
【英文主题词】:Acousticmeasurement;Aerodynamicflow;Aerodynamics;Airbornenoise;Airbornesound;Controlvalves;Correctingunits;Definitions;Digital;Digitalengineering;Dimensioning;Direction-controlvalves;Electricalengineering;Emission;Flowcapacity;Flowrates;Fluidengineering;Gasflow;Gasvalves;Laboratories;Laboratorytesting;Laboratorytests;Measurement;Measurementofairbornenoise;Measuringtechniques;Noise;Noisecharacteristic;Noiseemissions;Noisemeasurements;Pipelines;Processcontrol;Processmeasuringandcontroltechnology;Ratings;Sound;Soundlevel;Soundpressurelevel;Soundpropagation;Testing;Valves
【摘要】:ThispartofIEC60534-8definesequipment,methods,andproceduresforobtaininglaboratorymeasurementsofsoundpressurelevelsradiatedbycontrolvalvesand/orassociatedpipingconfigurations,includingfixedrestrictions,throughwhichcompressiblefluidsarepassing.Controlvalvesdischargingtoatmosphereareexcludedfromthisstandard.MethodAisauniformmethodofmeasuringtheradiatednoisefromthevalveandassociatedtestpipingandallowsacomparisonofvariousmeasuringresultswhichisbeneficialforbothuserandmanufacturer.Thenoisecriteriaareexpressedbydeterminingthesoundpressurelevelofthevalveunderconsideration.MethodBisaprocedureformeasuringthesoundpressurelevelswithinpipesystemsupstreamanddownstreamofthevalveunderfixedoperatingconditions.Sinceinaccuraciesduetothepipetransmissionareeliminated,thismethodispreferredforevaluationoftheacousticalcharacteristicofvalves.Thenoisecharacteristicstobedeterminedareusefulforthefollowingreasons:a)tocomparetheperformanceofdifferentvalves;b)toplanmeasuresfornoiseabatement;c)todetermineacousticalcharacteristicsofvalvesandvalveassemblies;d)toenablepropersizingofsoundabsorbers;e)todeterminepossibleadverseeffectsonultra-sonicflowmetermeasurements.
【中国标准分类号】:N16;J16
【国际标准分类号】:17_140_20;23_060_40
【页数】:44P.;A4
【正文语种】:英语