低汽蝕余量泵誘導(dǎo)輪的研究.pdf

1、江蘇大學(xué)碩士學(xué)位論文低汽蝕余量泵誘導(dǎo)輪的研究姓名：孫建申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：流體機(jī)械及工程指導(dǎo)教師：孔繁余20060301江蘇大學(xué)碩士學(xué)位論文ABSTRACTComp砌withcomlTloncentrifugalpumps，lowNPSHRpumpshavesmallerNPSHRandbetteranti—cavitationcapabilityUsuallytheyareusedinlowerNPSHAconditionssuc

2、hastransportingfluidswhicharepronetoboilawayandthelikeThus，theyarcwidelyusedinmanydepartmeutssuchasspaceflight，petrochemicalplants，thermoelectricityfireprotectionandthelikeOneoftheprimarymethodstoimprovecavitationperform

3、ancesoflowNPSHRpumpsistofixinducersattheirinletCompared、Ⅳimothermethodsinducershavetheseadvantagessuchassimpleconfiguration，ordinarymanufactureandinstallation，lowcost，allpurposecharacterconvenientservicingandreplacing，SO

4、aremoreapplicabletoalterationofawholesuitofpumpsButmosttechnologyoflowNPSHRpumpsisstillinthestepofgropingAlthoughpeoplehadagreedonincreasingtheinletdiameterofimpellerandthewidthofleadingblade，thedetailedselectionofthesep

5、arametersarestillunderinvestigationAsforinduceritsdesigntheoryandmethodarestillinseekingaSyetandtherehasbeennoevenonemonographRelativeplantshavescarcelydesigncapabilityofthemselves，sayingnothingofaseriesofoptimizationofi

6、nducerforreferenceBasedonstudyofdesigntheoriesofinducerthispaperfoundedarelativelyconsummatedesigncalculationmethodofvariablepitchinducerItsdesignflowandaffairsthatshouldbenoticedinthecourseofdesignwereexpatiatedbyanexam

7、pleAndexperimentationsindicatedthatthisdesigncalculationmethodhadachieveddestinedrequestandgotexcellentcavitationperformancesFurthermore，numericalsimulationandcalculationanalysisoftheinnerflowofinducerweredoneinthispaper

8、tofindoutitsflowinformation，whichcanobtaintheoreticalfoundationsforinducerdesignandmatchingrelationshipofstructureandenergybetweeninducerandimpellerAtlastconsideringparameterssuchassize，structureetc，aprimaryrecommendedse