Page 114 - 《水资源与水工程学报》2024年第6期
P. 114

!35 "!6 #                         & ' ( ) & * + , -                               Vol.35No.6
               2024 $ 12 %              JournalofWaterResources&WaterEngineering                 Dec.,2024

            DOI:10.11705/j.issn.1672-643X.2024.06.11


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                       EffectofFroudenumberandReynoldsnumberonaerationof
                                        highspeedflowinspillwaytunnel

                         MABin,ZHANGZiliang,GOUWenjuan,ZHANGNan,WANGTianyuan
             (StateKeyLaboratoryofHydraulicEngineeringIntelligentConstructionandOperation,TianjinUniversity,Tianjin300072,China)

                 Abstract:BasedonthemodelconstructionofthedeepholespillwayofLianghekouHydropowerStation,
                 theinfluenceofFroudenumberandReynoldsnumberonhighspeedflowaerationisstudied.Theresults
                 showthatwiththeincreaseofFroudenumberandReynoldsnumber ,theaerationeffectofwaterflowis
                 enhanced,andwiththevariationofFroudenumber,theaerationconcentrationinthesamesectionpres
                 entsCshaped,Sshapedandhorizontaldistribution,respectively.Accordingtothecomparisonofthe
                 relativepositionofthemeasuredsectionandthedistributionlawoftheaerationconcentration ,therelative
                 positionsoftheaerationcarryingarea ,thedissipationareaandtheuniformaerationmixingareaare0-
                1 ,1-1.5andafter1.5,respectively.Thebottomaerationconcentrationgraduallydecreasesalongthe
                 course,whiletheaverageaerationconcentrationincreasesfirstandthendecreases;thebottomaeration
                 concentrationgraduallyincreaseswiththeincreaseofFroudenumberandReynoldsnumber,andtheav
                 erageaerationconcentrationgraduallyincreaseswiththeincreaseofFroudenumberandthedecreaseof
                 Reynoldsnumber.Thisstudysummarizedthedominantfrequencyrangeofthenegativepressureofthe
                 cavity ,thebottomoftheventilationshaft,theendofthecavitylengthandthepulsatingpressureofthe
                 flow ;anddiscussedtherelationshipbetweencavitylength,protectionlength,air-waterratio,negative
                 pressureindexandFroudenumber.
                 Keywords:spillwaytunnel;highspeedflow;aerationconcentration;Froudenumber;Reynoldsnum
                 ber ;pulsatingpressure





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