葉輪機械流場計算與任意回轉面葉型設計.pdf

1、南京航空航天大學碩士學位論文葉輪機械流場計算與任意回轉面葉型設計姓名：徐夏申請學位級別：碩士專業(yè)：航空宇航推進理論與工程指導教師：周正貴201103葉輪機械流場計算與任意回轉面葉型設計iiABSTRACTThisarticlefocusesontheaerodynamicperfmancecalculationofVerticalAxisWindTurbinetheflowacteristicsthedesignofbladeprofi

2、leonarbitrarilyrotationalsurface.Specificcontentisdividedintothreeparts.ThefirstpartisresearchingontheaerodynamicperfmanceofVerticalAxisWindTurbine.Firstconsideringtheeffectofthephysicaltimestepfarfieldboundariessoontheu

3、nsteadynumericalmethodofVerticalAxisWindTurbinewithhighaccuracywasfmedbyusingFluentCommercialSoftware.Onthisbasisresearchingonthegeometricparameterofbladenumberschdlengthbladesettinganglebladeprofilewhichaffectedtheunste

4、adyflowacteristicsofthestraightwingVerticalAxisWindTurbine.ThenanewaerodynamicperfmanceprogramofVerticalAxisWindTurbinebasedonthestreamtubemodelwasestablishedbyintroducingenergylossmodel.TheaerodynamicperfmanceofVertical

5、AxisWindTurbinewasrespectivelycomparativestudiedbyusingthesetwomethods.Theresultsshownthattherewasagoodconsistencyoftheresultsoftwomethodsbothofthemhadacertaindegreeofcalculationaccuracy.Thesecondpartisthatdevelopingthef

6、lowfieldsoftwareofarbitrarilyrotationalcadeswithusingBaldwinLomaxturbulencemodelthecurvilinearcodinatesNSequation.Thediscreteofequationwasfinitevolume.Thenthelocaltimestepremnantpolishedtechniquewasusedtoacceleratethecon

7、vergence.ThereliabilityoftheresultswascertifiedbyNUMECACommercialSoftware.Thesubsonictransonicflowacteristicsofrotarycadeswereanalyzedbytheselfsoftware.Thethirdpartisthatanewmethodofarbitrarilyrotationalsurfaceoptimizati

8、ondesignbasedonoldselfdevelopedplatfmwasdevelopedwithusingalgithmMultipletartheParameterDesignMethodoftheadditionalmodifier.UsedMultipletargetoptimizationdesign(pressureratiolossarea)thismethodwasadoptedftheoptimizationd

9、esignofsubsonictransonicarbitrarilyrotationalprofilesthentheaerodynamicperfmanceoftheoptimizationisbetterthantheiginaltheresultsshownthatthedevelopedsoftwarewasvalideffective.KeyWds:VerticalAxisWindTurbinecompressunstead