基于CFD提高離心泵多工況點效率的研究.pdf

1、上海大學(xué)碩士學(xué)位論文基于CFD提高離心泵多工況點效率的研究姓名：張洪博申請學(xué)位級別：碩士專業(yè)：工程力學(xué)指導(dǎo)教師：陳紅勛20090301上海大學(xué)碩士學(xué)位論文ABSTRACTThepumpsarewidespreadmachineryinindustryapplicationAccordingtothestatistics，pumps’powerconsumptionprobablyoccupies20％inthetotalnational

2、generatedenergyeveryyearinChinaThefuelconsumptionisalsoquiteconsiderableAmongtheallkindsofpumps，thecentrifugalpumpsareabroadheading，whichapproximatelycomposesmorethan70％ofthepumpproductsSothejobthatmakingoptimizationtoce

3、ntrifugalpumps’bladesisimportantforimprovementofdesignofpumpsandenergysavingTheinternalflowsofthecentrifugalpumpsareverycomplex，whichareunsteadyturbulenceflowwithgreatmanyspecialflowbehaviorsTheperformancesofpumpsaregrea

4、tlyaffectedbytheinternalflowpatternOptimizingthebladetocontroltheflowinthepumpsbyanalysisofinternalflowisagoodchoicetoimproveFirstofall，basedonthenumericaltechnologytotheviscousincompressibleflowandinternalflowpatternofc

5、entrifugalpumps，thebasiccontrolequationforflowinthecentrifugalpumpsismade，SOastotheboundaryconditionandnumericaltechnologyThenaccordingtogeometricalcharacteristicofcentrifugalpumps，foursetofhexahedronmeshesweremadewithgr

6、idelementnumberincreasingprogressivelyAseriesofsteadynumericalworkwastakenwithdifferentimpellerpositionsComparingtheseresultswithunsteadynumericalcalculation，theresearchWastakentofindtheinfluenceofimpellerpositionsonnume

7、ricalresult，togetrelationshipbetweensteadyandunsteadycalculationLaidthefoundationfordesigninghighlyefficientimpellerbasedonCFDFinallyseriesofnumericalcalculation，experimentandtheoryanalysiswastakenAndaspecialkindofdistri

8、butaryimpellerandgroovebladewerecarriedforoptimizationdesignAccordingtotheresults，thegroovebladecouldmakeagreatimprovementfortheefficiencyofpumpinthefullworkingconditionBasedontheboundarycontrollingmethod，guidingtheupstr