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关于供水管网系统水力过渡过程的研究和计算.docx

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关于供水管网系统水力过渡过程的研究和计算 Abstract Watersupplypipelinenetworksystemplaysanimportantroleinourdailylifeandeconomicdevelopment.Duringtheoperationofthepipelinenetworksystem,waterhammerandwatertransientphenomenamayoccurandcauseseriousconsequences,suchaspipeburst,damagetoequipment,andwaterqualitydeterioration.Therefore,itisnecessarytostudyandcalculatethewatertransientphenomenoninthepipelinenetworksystem,inordertoensurethesafeandstableoperationofthesystem.Thispaperintroducesthewatertransientphenomenon,thetypesofwaterhammer,andthecalculationmethodsforwatertransientproblemsinthepipelinenetworksystem. Keywords:Watersupplypipelinenetworksystem,waterhammer,watertransient,calculationmethod. Introduction Watersupplypipelinenetworksystemisanimportantinfrastructuretoensurepeople'sdailylifeandindustrialproduction.Thepipelinenetworksystemconsistsofwatersupplysources,watertreatmentplants,watersupplypipelines,pumps,valves,andotherequipment.Duringtheoperationofthepipelinenetworksystem,thewaterflowchangesfrequentlyduetothevariationofwaterdemand,pumpoperatingconditions,andvalveoperations.Thesechangesinflowratewillcausewatertransientphenomenainthepipelinenetworksystem,suchaswaterhammer,watersurge,andwatercolumnseparation.Thesewatertransientphenomenacanproducehighpressureandsurge,whichmaydamagethepipelinenetworksystem,equipment,andevencausepersonalinjury.Therefore,itisnecessarytostudyandcalculatethewatertransientphenomenoninthepipelinenetworksystemtoensureitssafeandstableoperation. Watertransientphenomenon Watertransientphenomenonreferstothechangesinwaterflowandpressurecausedbythesuddenchangesinflowrateorflowdirectioninthepipelinenetworksystem.Thewatertransientphenomenonincludeswaterhammer,watersurge,andwatercolumnseparation. 1.Waterhammer Waterhammerisakindofwatertransientphenomenoncausedbythesuddenchangeofflow,whichproducesapressurewavethatpropagatesinthepipelinenetworksystem.Waterhammerischaracterizedbyasuddenincreaseinpressureandisusuallyaccompaniedbyaloudnoise.Waterhammercancausedamagetothe