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Optimizeddesignoferosion - reducedbladesinaFrancisturbine
QIANZhongdong,ZHONGQinqin,ZENGXincheng,GUOZhiwei
(StateKeyLaboratoryofWaterResourcesEngineeringandManagement,WuhanUniversity,Wuhan 430072,China)
Abstract:ErosivedamageofFrancisturbineoperatedalongthesand - ladenriversisthekeypointinhydropower
development.Sandandflowfluidarethemainfactors,andmethodstoimprovetheflowfieldarethemaincontent.
Adaptingtheanglealongthebladeleadingedgeandtheinstallationangleisproposedbasedonthedesigntheoryof
turbinebladestoreshapethedamagedistribution.Theresultsshowthatreasonabledesignfortwoanglescanreduce
bladedamage ,andensureoperatingefficiency,butincreaseshrouddamage.Underthecombinationoftheangle
alongthebladeleadingedge θ = 0.2andtheinstallationangleindex x = 3 ,thebladedamagedecreasesbyamaxi
0
mumof71%.Thereasonisthatduetoangleadjustments,thevortexaltersandthehittinglocationdeviates,re
sultinginerosivewearindifferentregions.Finally ,thedesignoptimizationofprotectingthebladesbysacrificing
theshroudismoreeffectiveinreducingmaintenancecostsandincreasingmaintenanceconvenience.
Keywords:Francisturbine;erosivedamage;anglealongthebladeleadingedge;installationangle;interblade
vortex
(责任编辑:王 婧)
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