某型航空螺旋离心泵性能计算研究

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1、西北工业大学硕士学位论文Abstr扫CtAbstractFuelPun1pandlubepumpusedinpresentaero一engineandsp即e一engineareorientedtosmallervolume，biggerfluxandhigherPressure.Theydifersmuchftomthetradi〔ionalhydraultcelementbothinmecl、anicsandlnPrincipleThefreshthoughtandcutemethodusedinthesePumPsmakethemworkbetteran

2、dcontributemoretotheoPerationofthefulesystem.Thus，itisofmuchindlsPensabilitytofind0以thenewideasandexclusivemechanics.struc皿eandPerformanceofasCrewcentrifugalpumpusedinaero一enginewasdiscussedinthisPape仁AndthecalculationmethodofthepumP，sPerformancewasalsogivenout‘ThopaperbeginsWiththe

3、discuSsionoftheQPeratingPrinclPIeand丘ulctlonofthescrewinducer，sPecialelementofthePumP，andthengivesthedefinitionandrelationshlpofthePar翻etrs眼dthecurveh”Ictionof阮induceraswe[1，whlchlsofgreaT1mportancetodataanalyzingandPumP一manul五cturingByPresentingthesimPlifiedflowmodel，theflowandvelo

4、citytrianglesWereanalyzed-Inthep即er，theauthorexcava沈dtheperformance，cal伪latedthevelocity，Pressureandflowloss0fthewormshell，theoutletelementofthePumpAccordingtothecommonmethodofthePerformancecalculatlonofcentrifugalpump，由eauthorcalculatedtheheadandpoWerofthepump，showedthe从’ayto邵ttheP

5、ressuxeoftheoutlet.Andtheallthoralsoindicatedthe1n1Pactofthestructureparametersandthusguidedthedesignofthe训mp-Theresu1tsshowthatthescrewcentrifugalP皿p主satyPeofwell一workingPumPwithgoodPerformanceIthashigherheadandeficiencywithbeterabilityofanti一erosion.BoththeParametersandtheworkingc

6、onditioncanafectthePtnP，5operationalldPerform助cedirectl丫ltisausefulwaytoohangetheseParamete巧tomecttheneedoftheengineering.[城卿。rdslscrewcentrifuga飞pump;screwinducer;wormshellPerfonnallcecalculation，0/...................西北工业大学硕上学位论文符号说明符号说明符号说明川泵进口压力PZ泵出口压力Q泵体积流量Llh风螺旋叶轮进口半径用m凡螺旋叶轮出口半

7、径mmL螺旋叶轮长度m功气螺旋叶片螺距mm沪度螺旋叶片最大包角2度螺旋叶片倾角5螺旋叶片厚度mm凡泵底面厚度mm￡度螺旋轮心锥体半角1度螺旋轮心锥体长度螺旋轮心锥体半径mm螺旋叶片的螺旋升角转速r/min甄螺旋轮中液体的轴向速度加/s气螺旋轮中液体的径向速度m/s气攻角几螺旋轮进口液流角氏螺旋轮进口外径处叶片安装角III西北工业大学硕I-学位论文符号说明CkP汽蚀比转速九流量系数入'PS月诱导轮气蚀余量Rd轮毅比气蚀系数b,mm离心叶片出口处宽度离心叶片出口半径mm水力效率容积效率泵的总效率K,.,,离心叶轮叶片出口排挤系数离心叶轮有限叶片系数离心叶片个数2螺

8、旋轮的纵向高度mm气离心叶轮进口半径嫩