水庫深水排沙設(shè)施的水動力和排沙特性的研究.pdf

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