【英文标准名称】:Industrial-processcontrolvalves.Part8-3:Noiseconsiderations.Controlvalveaerodynamicnoisepredictionmethod
【原文标准名称】:工业过程控制阀.第8-3部分:噪声考虑.控制阀的气动噪声预测法
【标准号】:IEC60534-8-3-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-11-01
【实施或试行日期】:2010-11
【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】:声学测量;气动流;空气噪声;控制阀;校正装置;定义(术语);方向控制阀;电气工程;流体工程;实验室测试;实验室试验;液体流量;数学计算;测量;空气噪声测量;测量技术;计算方法;噪声;噪声辐射;噪声测量;管道;过程控制;过程测量和控制技术;声压级;试验;阀门
【英文主题词】:Acousticmeasurement;Aerodynamicflow;Airbornenoise;Controlvalves;Correctingunits;Definitions;Direction-controlvalves;Electricalengineering;Fluidengineering;Laboratorytesting;Laboratorytests;Liquidflow;Mathematicalcalculations;Measurement;Measurementofairbornenoise;Measuringtechniques;Methodsofcalculation;Noise;Noiseemissions;Noisemeasurements;Pipelines;Processcontrol;Processmeasuringandcontroltechnology;Soundpressurelevel;Testing;Valves
【摘要】:ThispartofIEC60534establishesatheoreticalmethodtopredicttheexternalsoundpressurelevelgeneratedinacontrolvalveandwithinadjacentpipeexpandersbytheflowofcompressiblefluids.Thismethodconsidersonlysingle-phasedrygasesandvapoursandisbasedontheperfectgaslaws.Thisstandardaddressesonlythenoisegeneratedbyaerodynamicprocessesinvalvesandintheconnectedpiping.Itdoesnotconsideranynoisegeneratedbyreflectionsfromexternalsurfacesorinternallybypipefittings,mechanicalvibrations,unstableflowpatternsandotherunpredictablebehaviour.Itisassumedthatthedownstreampipingisstraightforalengthofatleast2mfromthepointwherethenoisemeasurementismade.Thismethodisvalidonlyforsteelandsteelalloypipes(seeEquations(21)and(23)in5.5).Themethodisapplicabletothefollowingsingle-stagevalves:globe(straightpatternandanglepattern),butterfly,rotaryplug(eccentric,spherical),ball,andvalveswithcagetrims.SpecificallyexcludedarethefullboreballvalveswheretheproductFpCexceeds50%oftheratedflowcoefficient.Forlimitationsonspeciallownoisetrimsnotcoveredbythisstandard,seeClause8.WhentheMachnumberinthevalveoutletexceeds0,3forstandardtrimor0,2forlownoisetrim,theprocedureinClause7isusedTheMachnumberlimitsinthisstandardareasfollows:
【中国标准分类号】:J16
【国际标准分类号】:17_140_20;23_060_40;25_040_40
【页数】:100P.;A4
【正文语种】: