水庫深水排沙設施的水動力和排沙特性的研究.pdf

1、天津大學碩士學位論文水庫深水排沙設施的水動力和排沙特性的研究姓名：張麗申請學位級別：碩士專業(yè)：水利水電工程指導教師：練繼建20080501ABSTRACTXiaolangdihydraulicprojectisoneofthemainworksinsedimentdischargeregulationsysteminYellowRiverwhichisalsolocatedOffthekeypositionofcontrollingwa

2、terandsedimenttodownstreamItplaysanveryimportantstrategicroleinharnessanddevelopmentofYellowRiverAtpresent，howtogetthereasonableandeffectivesedimenttreatmentmeasuresandwaysofsedimentreleaseanddesiltingteducethesedimentat

3、ioninreservoirandalleviatethelossratioofreservoirstorage，hasbeenabigproblemneededtosolveurgentlyinthecaseofthecontradictionbetweenthewaterusinganddredgingThisarticleputsforwardanewsedimentationstructure，thenewtypeofthear

4、rangementofsedimentbuilding“Forwardextendedsandflushinggallery”，andanewpaRemofsedimentdesilting，“theIntegrationofmechanicaldredginganddesiltingtunnelofXiaolangdiproject”，thusthebeRersolutionswouldbefoundforthedredgingpro

5、blemsofXiaolangdiHydraulicProjectindeepwaterThemainworkofthispapercanbeconcludedasfollows：(1)Onthebaseofthedesiltingtunnelhavingbeenbuilt，anewtypeoflayoutofsedimentstructure，“Forwardextendedsand—flushinggallery”andanewpa

6、tternofsedimentdesilting，‘theIntegrationofmechanicaldredginganddesiltingtunnelofXiaolangdiproject”，areputforwardinthepapertogetthebettersolutionstothedesiltingproblemsofXiaolangdi(2)Threedimensionalnumericalmodelofforwar

7、dextendedsandflushin2galleryisestablishedtocomputethepressureandvelocitydistributionsintheflushinggalleryandsedimenttunnelinthecaseofthedifferentworkingconditionsoftheorificegatesopeningThroughthecalculations，thedistribu

8、tionlawsandchangingtrendsarefoundandcomparedwiththeresultsofthemodeltestThecomparisonresultsshowthatthenumericalmodelhashigheraccuracy(3)Throughthemodeltests。thepressuredistributionsintheflushinggalleryandsedimenttunnel，

9、inthecaseofthedifferentworkingconditionsoftheorificegatesopening，arestudiedandanalyzedThepressuredistributionlawsandchangingtrendsaregainedthroughtheresultsofthepreliminaryanddimensionlessanalysis，andalsothegraphoftherel