消力池内双层悬栅消能效果及栅条较优布置研究-水力学及河流动力学专业论文.docx

TheStudyonEnergyDissipationEffectandBetterPlacementMethodofDouble·layersSuspendedGridsintheStillingBasinAbstractToapplythesuspendedgridenergydissipaterintostillingbasin，itisnoteasyforittobewashedbysedimentflowbecauseithangsinthewallofstillingbasin，whichcanplayaroletohelpwitheliminatingenergy．SoitisannewauxiliaryenergydissipaterwithbeRerapplicability．Previousstudieshavebeencarriedoutonthesuspendedgridenergydissipationengineering．Thestudymainlyfocusesonthearrangementofthesingle-layersuspendedgrid，butthestudiesofarrangementofthedouble-layersuspendedgridarefew．Throughtheexperiment，itisveryimportanttostudytheeffectofdouble—layersuspended酣denergydissipation．Onthebasisoftheresearchofsuspendedgridenergydissipater,themodeltestisdesignedbythemethodofuniformorthogonaldesignandthemodelexperimentresultswereanalyzedbyrangeanalysismethod．Atthesametime．thispaperusesRNG肛吧turbulentflowmodelofthefluiddynamicssoftwareFLUENTtosimulatethedouble-layersuspendedgridplungebasin．Then，thenumericalsimulationresultswereprocessedbyTecplotsoftwareandtheflowvelocitydistributionmap，pressuredistributionmap，pressuredistributionmapofthenumericalsimulationareanalyzed，andtheaveragepressuredifferencearoundthesuspendedgridisanalyzed．Throughcomparing modeltestresultsandnumericalsimulation results，itcomestotheconclusion．Inthemodelexperiment，whenthesuspendedgridisnotarranged，theflowpageminstillingbasinisdisorderedandthewatersurfacefluctuatesviolently；Whenthesuspendedgridisarranged，theflowpatterninstillingbasinisstable，andthewatersurfaceisnotviolent；Withthesamegridnumber,theflowpaRemismorestableandthewatersurfacefluctuationis smallerifarrangedouble—layersuspendedgrid，andtheflowpaRemisstableundertheconditionoflessgridnumber．Thechangeofdouble—layersuspendedgridhaslittleeffectonstillingbasinenergydissipationratiobuthaveagreaterimpactonthedeclineofstillingbasindepth．Withoutconsideringtheunitwidthdischarge，theeffectintensityofeveryfactorofdouble—layersuspendedgridondropdeepisinterval(themost)，pitch(relativelystrong