Page 140 - 《水资源与水工程学报》2022年第1期
P. 140

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

            DOI:10.11705/j.issn.1672-643X.2022.01.19


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                 BCDEF:TV131   GHIJK:A    GLMF:1672643X(2022)01013608
                     Transienthydrauliccharacteristicsofradiationflowinaparallel
                                   singlefractureconsideringwallslipeffect


                                           1
                                                          2
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                                                                          2
                                 DUWanjun,CHAIJunrui,XUZengguang,CAOCheng
                    (1.YanglingVocational&TechnicalCollege,Yangling712100,China;2.StateKeyLaboratoryofEcohydraulics
                           inNorthwestAridRegionofChina ,Xi’anUniversityofTechnology,Xi’an710048,China)
                 Abstract:Inordertostudythemesohydrauliccharacteristicsofradiationflowinaparallelsinglefrac
                 ture ,ak- ε calculationmodelbasedonturbulenceRANSisestablished.Thesimulationresultsshowthat
                 theradiationflowintheparallelsinglefracturepresentsthecharacteristicsof“atypicalradiationflow”,
                 andapreferentialhydraulicchannelisusuallyformed;becausetheevolutionofthevorticesnarrowsthe
                 flowchannel ,theclosertothepreferentialhydraulicchannelortheradiationcenter,thestrongertheflow
                 velocityandvortexintensitybecome ;theriseofwaterpressureattheradiationcenterleadstothein
                 creaseoffractureflow,andtheearlierthepreferentialhydraulicchannelisformedandmorestableitis,
                 thewiderthefracturebecomeandthemoresignificanttheturbulenceeffectofthefractureis,butthe
                 fractureflowisdominatedbyradialturbulence;thefracturecontactsurfaceredistributesthepreferential
                 hydraulicchannel ,whichdecreasestheseepageabilityofthefracture,andthecontactrateisnegatively
                 correlatedwiththefractureflow;thewallslipcanbeeitherobstructiveorbeneficialtothefractureflow,
                 dependingonthedirectionandvelocityoftheslip.Itisfoundthattheinletwaterpressure,fracture
                 width ,contactrateandwallsliphaveasignificanteffectontheradiationflow,andthesefindingscan
                 provideareferenceforthestudyofradiationflowincomplexfractures.
                 Keywords:parallelsinglefracture;atypicalradiationflow;transienthydrauliccharacteristics;dominant
                 hydraulicchannel;wallslipeffect



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