Page 97 - 《水资源与水工程学报》2022年第1期
P. 97

!33 " ! 1 #                       & ' ( ) & * + , -                               Vol.33No.1
               2022 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2022

            DOI:10.11705/j.issn.1672-643X.2022.01.13


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                 BCDEF:TV131.3 4   GHIJK:A    GLMF:1672643X(2022)01009308
                      Numericalsimulationontheaeratedwaterinaspillwaytunnel
                                    basedonamixing-concentrationmodel

                                                                           1,2
                                                                                         1,2
                                         1,2
                                                          1,2
                              LIANJijian ,RENPanhong ,LIUDongming ,HEJunling
                  (1.StateKeyLaboratoryofHydraulicEngineeringSimulationandSafety,TianjinUniversity,Tianjin300350,China;
                                 2.SchoolofCivilEngineering,TianjinUniversity,Tianjin300350,China)
                 Abstract:Wateraerationcanreducethecavitationdamageofthedrainagestructure,whichisessential
                 tothesafeoperationofthehydraulicengineering.Numericalsimulationhastheadvantagesoflowcost
                 andnoscalingeffect ,anditcanproducemorecomprehensiveflowfieldinformation,soithasbecomean
                 effectivemethodforstudyingaeratedflowatpresent.BasedontheselfdevelopedNEWTANKnumerical
                 model ,amixing-concentrationnumericalmodelwasdevelopedtostudytheaeratedwaterflowinatun
                 nel.Thesimulationresultsshowthatthesimulatedflowvelocityandtheairconcentrationareingooda
                 greementwiththeexperimentaldata ,whichverifiesthefeasibilityofthisnumericalmodel.Furthermore,
                 alargeaircirculationwasformedinthetunnelandthereverseairvelocityincreasedfrom2m/sto5m/s
                 alongthewaterflowdirection.Furtherresultsshowthatwhenthegateopeningwasconstantandtheap
                 proachingwaterheadgraduallyincreasedfrom5mto15m ,theaerationofthewaterwasfurtherstrength
                 ened ,resultingingreaterbottomairconcentrationandaerationthicknessattheoutlet,whichincreased
                 from0.006to0.060,0.08mto0.12m,respectively.
                 Keywords:mixing-concentrationmodel;mixingmodel;concentrationmodel;airconcentration;flow
                 velocity ;theapproachingwaterhead;spillwaytunnel

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