長距離虹吸管輸水試驗研究.pdf

1、新疆農(nóng)業(yè)大學碩士學位論文長距離虹吸管輸水試驗研究姓名：許史申請學位級別：碩士專業(yè)：水力學及河流動力指導(dǎo)教師：邱秀云201006IIIExperimentalResearchonPumpingWaterbyLongDistanceSiphonAbstractUsuallywaterdeliverydisgeofsiphonpipingiscalculatedbythefmulagHAQ20μ=(∑=?λμdl10).Butinthehyd

2、raulicmodeltestaboutlongdistancesiphonpipingengineeringofXinjiangthemeasureddisgeofthepipeisverydifferentfromthedesignonewhichiscalculatedbythefmula.Basedonthistestresultsinthispaperthewaterdisge’scalculationmethodofsiph

3、onpipehasbeendiscussedthroughmodeltestsatthelabaty.Theresultsindicatethatsiphonpipedisgeisinfluencednotonlybytheusualfactssuchasthefmofpipearrangementcaliberpipelinepiperoughnesswaterlevelbutalsobythesettingheightofsipho

4、n.Someconclusionscanbedrawnbymodeltests:(1)Indertocontentwithsimilardemofvapizationthesiphonpiping’ssettingheightinthemodelcan’tbedesignedonlybygravitysimilitudeprincipe.(2)Underconditionsofsamewaterlevelthewaterdelivery

5、disgegraduallydecreasesalongwiththeincrementofsettingheightthedisgecalculatefmulationattachedwithsettingheightoflongsiphonpipingisderived.(3)Observedflowvapizationofvacuumdeliverypipeindifferenctwkingconditionswhilepipec

6、rosssectionvelocityisbiggerthanairbubble’scompetentvelocitysiphonpipecanwkwellotherwisewaterinterceptionwillhappen.(4)Theairexhaustpatternairreliefinstallation’slocationflongdistancesiphonpipehavebeenstudiedbythemodeltes