30M水頭段高性能水力模型的開發(fā).pdf

1、蘭州理工大學(xué)碩士學(xué)位論文30M水頭段高性能水力模型的開發(fā)姓名：江良榮申請學(xué)位級別：碩士專業(yè)：流體機械及工程指導(dǎo)教師：齊學(xué)義2008041030M水頭段高性能水力模型的開發(fā)AbstractInrecentsomeyears，astudyingtoolsofflowmechanicsCFD(ComputationalFluidDynamics)hasbeenwidelyusedinthefieldofnuidmachinedesign，es

2、peciallyinthefieldoftheoptimizationdesignofnuidmachineandithasbeenamainmeansinturbinedesignWecandeVelopexcellentturbinewithbetterabilitiesbythecombinationofCFDmethodandmodeltesttechnology，whichhasgreatlypromotedthedevelo

3、pmentofturbinetechnique，shonenedtheperiodofturbinedesign，reducedcostItcanalsopredictabilities0fturbineaccufately，andimproVedthequality0fturbinehydraulicdesigntechnologyremarkablyIn0rdertosolvethesedifficultieswhichwewill

4、havewhenwedo3一Dmodelincomputerbecause0fthecomplexityoftheblade’sshapeThenewmethodof3DmodelingofFrancisturbine’sbladeisintroducedinthisaniclethatisbasedonthe2Dwoodfb瑚dfawingofFrancisturbine’sblade，andusePRO／Etodrawlinefto

5、mpoint，thendrawsurfacefromline，finallygetbodyofthebladefromsurface7I0increaseaccuracyofmodel，theinletedge，upperandlowercanopyOfnInnerbladearemodifiedbycuttingWeget3一DmodelofI’rancisturbine’sbladetrulywhichisshowedinwoodf

6、bmdrawing0fFrancisTurbine’sBladebythismeansAccordinglywegetfurtherthemodelofFrancisturbineThePRO／Eisadoptedin3DmodelingofFrancisturbine’sblade，wecansavetimeandcost，andthismethodcanestablishslickingwoodfbrmdrawing0fturbin

7、e’sblade，theCFDanalysis0ff10wfieldinturbineandperfb皿anceprediction0ftheturbincThetopicisaimedatwaterpowerresourcesexploitation0f30mhydraulichead，wehavetodevelopanewhydraulicmodelofhydr0turbineAuthorch00sesaturbinewhosepe

8、rfbnnanceisbetterasinitialturbinemodelinthishydraulichead，thenremodelitAccordingtothedesignparameter，thewriterchoosesHL260turbineFirsttheway0fshortenaerofoilisusedtemodelinitialturbinemodelthatcanincreaseflowrateanddeliv

9、eredpowerofturbineThenlesseningunreasonabledistrictofvelocityandpfessurespread，abatingswirlofblade’sworkingfaceinthemethodofadjustinginletbladeangleThiswaycanimproVeflowfieldinturbine，increasehighpressufearea0fblade’swor

10、kingface，andthepressuredifferenceofblade’smakingfaceandthebackcorrespondingpointisraisedtherebyThisishelpfultoincreaseefficiencyanddeliVeredpower0fturbineFinallywepredictperformance0ftheremodeledturbinebyCFDanalysis，andd