一種新型變攻角直葉水輪機(jī)水動(dòng)力性能優(yōu)化研究.pdf

1、哈爾濱工程大學(xué)碩士學(xué)位論文一種新型變攻角直葉水輪機(jī)水動(dòng)力性能優(yōu)化研究姓名：汪魯兵申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：流體力學(xué)指導(dǎo)教師：張亮20030101啥爾濱工程大學(xué)碩士學(xué)位論文ImmlAbstractAhydrodynamicoptimalmethod幻enhancetheenergyconversioncoefficientoftheverticalaxisvariable—pitchturbineispresentedinthisPaDer

2、basedontheanalysisof血eexistingmathematicalmedeIsonthecomputationalmethodsforpredictingthehydrodynamicperformanceofturbinesandontheavailableexperimentalresultsByupplyingmathematicaloptimaltheory，amathematicalmodelforoptim

3、izingthehydrodynamicattackangleofthebladesofturbinesiSformulatedandsomenumericalresultsareobtainedaswellMuchattentioniSfocusedonthecomparisonandstudyingofthereliabilltyofthedifferentmethodswhenappliedtothiskindofturbinea

4、ndfecundontheprobingintothehydrodynamicmechanismofthenewoptimizedturbineAlloftheseiStheimportantbaseoftheselectingofturbines，thedesigningofhydrodynamicsperformance，andthegeneraldesigningofmarinecurrentspowerplantAtfirsta

5、nanalysisofthebasicprinciplesoftheverticalaxisvariable—pitchturbineiSgivenincludingtwomethodstocalculatetheinducedvelocityOneiSthethreedifferentstreamtube—methodswhicharesingledisksinglestreamtube(SDST)，double—disksingle

6、—streamtubc(DDST)andmultistreamtube(MTT)methodbasedonthemomentumtheorytheotheriSthevortexmethodrvTTH)basedonthepotentialeddytheoryThenasatypicalexamplesomeresultsdrawnbyusingtheintroducedmethodsofthevertical—axiscycloidt

7、urbinearegivenandcomparedwiththeexperimentaldata，ThepurposeisfocusonthevalidatiOnoftheintroducedmethodswhatarethefoundationsofthehydrod3，namicperformancecalculationandtheoptimalmethodAtlastwiththeprototypeofthevertical—a

8、xiscycloidturbine，theoptimalmethodanditsmathematicMmodelbasedonconjugategradientmethod眥presentedinordertoenhancetheenergyconversioncoefficientSuchoptimalresultsastheenergyconversionandtherelationbetweenattackangleandazim