水泵全特性曲線誤差分析及其對停泵水錘計算的影響研究.pdf

1、長安大學碩士學位論文水泵全特性曲線誤差分析及其對停泵水錘計算的影響研究姓名：劉利申請學位級別：碩士專業(yè)：環(huán)境工程指導教師：楊玉思20110611AbstractWiththerapiddevelopmentoflong—distancewatersupplyprojectandthefrequentoccurrenceofpipelineexplosioncalculationandprotectionofwaterhammeranal

2、ysisalsohasbeenemphasizedbyengineeringtechnicalpersonInthemanywaysofwaterhammercalculation，theelectricmethodcharacteristiclinemethodiSonemostcommonmethodwhichisapplicatedinrecentyearsItsbasisisalsothebasicequationsofwate

3、rhammerwhichisconversedintotheeasecomputingfinitedifferenceequationsbymeansofcharacteristiclineIntheanalysisandthecalculationofwaterhammerthestudyofFullfeaturedPumpCurveisveryimportantInthispaperwestudiedtheerroranalysis

4、ofFullfeaturedPumpCurveandimpactofpumpoffwaterhammercalculationunderthespecificdataNs=80，127and333AtlastwecombinedalargenumberofengineeringexamplesandhaveacomprehensiveanalysisandcalculationThemainworkingareasfollows：(1)

5、WeelaboratedthemeaningoftheFullfeaturedPumpCurveandtheapplicationofpump—offwaterhammercalculationindetailMainlyintroducedthediscretedataoftheFull—featuredPumpCurvevalueunderthespecificdataNs=80，127and333Largeamountsofdat

6、aincludingthemaximum，minimunlandthetheoreticalvalueoftheFullfeaturedPumpCurve，aregotbypicturingandcalculating(2)AsspecificdataNs280，127and333ofthepumpforexample，weusedlargeamountsofdataandtheFullfeaturedPumpCurvediscrete

7、datavaluestoanalyzetheabsoluteerrorandrelativeerrorBytheerroranalysisofFullfeaturedPumpCurvefoundthatrelativeerrorislargewhichhaveimpactonthecalculationofpump—offwaterhammer(3)AsthethreepumpingstationsofYanchuanwaterdive

8、rsionproject，onepumpingstationofFuxinwatersupplyprojectinLiaoningProvince，fivepumpingstationsofYanchuanwaterdiversionproject，pumpingstationofJilinProvincewatersupplyproject，pumpingstationofLiaoningProvincewatersupplyproj

9、ectforexample，themaximum，minimum，andtheoreticalvaluesofFull—featuredPumpCurveunderNs=80，127and333Weresubstitutedintotheprogram，whichwerecalculatedunderthesalneconditionsCombinedwiththemaximumlleadofthepumpenvelope，weanal

10、yzedtheimpactofPump—offwaterhammerstepontheerrorofFull—featuredPumpCurve，thefmalconclusionareasfollows：①TheerrorofFullfeaturedPumpCurvehaveagreaterimpactonpump—offwaterhammerespeciallyimpactonthelargediameterhighliftpipe