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1、建筑给排水中英文对照外文翻译文献图文 建筑给排水中英文对照外文翻译文献_文图文03?????建筑给排水中英文对照外文翻译文献??(文档含英文原文和中文翻译)??外文?Sealedbuildingdrainageandventsystems?—anapplicationofactiveairpressuretransientcontrolandsuppressionAbstract?Theintroductionofsealedbuildingdrainageandventsystemsisconsideredaviablepropositionforpl
2、exbuildingsduetotheuseofactivepressuretransientcontrolandsuppressionintheformofairadmittancevalvesandpositiveairpressureattenuatorscoupledwiththeinterconnectionofthework'sverticalstacks.?Thispaperpresentsasimulationbasedonafour-stackworkthatillustratesflowmechanismswithinthepipewo
3、rkfollowingbothappliancedischargegenerated,andsewerimposed,transients.Thissimulationidentifiestheroleoftheactiveairpressurecontroldevicesinmaintainingsystempressuresatlevelsthatdonotdepletetrapseals.?Furthersimulationexerciseswouldbenecessarytoprovideproofofconcept,anditwouldbeadv
4、antageoustoparallelthesewithlaboratory,andpossiblysite,trialsforvalidationpurposes.Despitethiscautiontheinitialresultsarehighlyencouragingandaresufficienttoconfirmthepotentialtoprovidedefinitebenefitsintermsofenhancedsystemsecurityaswellasincreasedreliabilityandreducedinstallation
5、andmaterialcosts.?Keywords:Activecontrol;Trapretention;Transientpropagation?Nomenclature?C+-——characteristicequations?c——wavespeed,m/s?D——branchorstackdiameter,m?f——frictionfactor,UKdefinitionviaDarcyΔh=4fLu2/2Dg?g——aelerationduetogravity,m/s2?K——losscoefficient?L——pipelength,m?p—
6、—airpressure,N/m2?t——time,s?u——meanairvelocity,m/s??x——distance,m?γ——ratiospecificheats??Δh——headloss,m?Δp——pressuredifference,N/m2?Δt——timestep,s?Δx——internodallength,m?ρ——density,kg/m3?ArticleOutline?Nomenclature?1.Introduction—airpressuretransientcontrolandsuppression?2.Mathema
7、ticalbasisforthesimulationoftransientpropagationinmulti-stackbuildingdrainageworks?3.Roleofdiversityinsystemoperation?4.Simulationoftheoperationofamulti-stacksealedbuildingdrainageandventsystem?5.Simulationsignconventions?6.Waterdischargetothework?7.Surchargeatbaseofstack1?8.Sewer
8、imposedtransients?9.Trapsealoscil
