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1、流体力学综合实验装置流体流动阻力测定（45）实验报告姓名：学号：专业：指导老师：装置号：日期：一、实验目的1．掌握测定流体流经直管、管件和阀门时阻力损失的一般实验方法。2．测定直管摩擦系数λ与雷诺准数Re的关系，验证在一般湍流区内λ与Re的关系曲线。3．测定流体流经管件、阀门时的局部阻力系数x。4．学会涡轮流量计的使用方法。5．识辨组成管路的各种管件、阀门，并了解其作用。二、基本原理流体通过由直管、管件（如三通和弯头等）和阀门等组成的管路系统时，由于粘性剪应力和涡流应力的存在，要损失一定的机械能。流体流经直管时所造成机械能损失称为直管阻力损失。
2、流体通过管件、阀门时因流体运动方向和速度大小改变所引起的机械能损失称为局部阻力损失。流体在水平等径直管中稳定流动时，阻力损失为：（1）即，（2）accident,assistinthedevelopmentofcorrectiveprogrammesandfollow,verify,recordandfeedbackinatimelymanner.Responsiblefortheoverallqualitymanagement,guidingprojectQCgroupactivities.7,theMinistryofplanningand
3、finance:withalltheresponsiblefortheproject'scontractmanager.Includingcurtainpileandboredpileconstruction.14,earth-movingmachines:equippedwithexcavators,dumptrucks,loaders,bulldozersandotherheavymachinery,mainlyresponsibleforFoundationpitexcavationandlogistic,jackingofEarthex
4、cavationandSinotrans.15,thebridgeconstructionteam:responsibleforthebridgeprojectallsteelmanufacture,lashing;templatepolishing,derusting,releaseagentbrushes,installation,reinforcementanddemolitionofconcretepouringandcuring,thewaterprooflayeroftheproduction,constructionofrailw
5、aysubgradeprotectionpile.16,jackingconstructionofbridgeteam:responsiblefortrackreinforcement,conservationandmaintenance,responsibleforpushingonlinesecurityprotection,responsibleforjackingequipmentoperation,maintenanceandcontrolofthejackingprocess,andisresponsibleforcorrectin
6、gandpreventingbar-head,lookedup.17,electricalworkshifts:responsibleforon-siteconstruction,prefabricatedbridgesthelayingofpowerlines,goodnighttimepowerprotection.Attimesofpeaklaborthroughstrengthenedstaffdeploymentwithinthecompany,toenhancetheengineeringstaffto三、实验数据记录根据实验测得的
7、数据填写到下表：直管基本参数：光滑管径粗糙管径局部阻力管径序号流量(m3/h)粗糙管压差（KPa）光滑管压差（KPa）局部阻力管压差（KPa）四、实验报告1．根据粗糙管实验结果，在双对数坐标纸上标绘出λ～Re曲线，对照化工原理教材上有关曲线图，即可估算出该管的相对粗糙度和绝对粗糙度。accident,assistinthedevelopmentofcorrectiveprogrammesandfollow,verify,recordandfeedbackinatimelymanner.Responsiblefortheoverallqualit
8、ymanagement,guidingprojectQCgroupactivities.7,theMinistryofplanningandfinan
