HL-2M環(huán)形低溫泵的概念設(shè)計(jì).pdf

1、華中科技大學(xué)碩士學(xué)位論文HL2M環(huán)形低溫泵的概念設(shè)計(jì)姓名：劉杰申請學(xué)位級別：碩士專業(yè)：制冷及低溫工程指導(dǎo)教師：陳煥新劉德權(quán)20080505IIAbstractThepumpingsystemofdivertisimptanttotokomak.Thepurposeofthesystemistopumpheliumashunburnedfuelstheimpuritiestoenhancetheperfmanceofdivert.Nowc

2、ryopumpsareusedonmostofthetokomaksalloverthewld.HL2Aistobemodifiedwithanefficientdivert(HL2M)whichneedspowerfuldivertpumpingsystemdesignatoidalcryopumpfHL2Misnecessity.Thestructuredesignthermalcalculationcoolingsystemele

3、ctromagicanalysisstructuralanalysisaregiven.ThetoidalcryopumpofHL2Misrefrigeratedcryopumpwithspecialcryopanelwhichcomposedofmanyconcentrictubes.Cannulaisusedtoenhancethetwophaseheattransferthesurfaceofoutertubeiscryopane

4、l.Liquidheliumisboilingintheoutertubetocoolthecryopanel.Manyslitsaresettledonthetopofinnertubetoreducethetemperaturedifferenceenhancethepumpingproperties.Thecalculationsofheattransfercoefficientflowconductanceeffectivepu

5、mpingspeedshowthatstructureofthetoidalcryopumpissuccessful.Thecalculationofheatloadofliquidheliumsystemisanotherkeypointofthepaper.Therearemanycoilsinthevacuumvariablecurrentsofthecoilsplasmawillproduceinducedelectriccur

6、rentJouleheatonthecryopump.Thecalculationofjouleheatisalsodetailedonthepaper.Electromagicfieldtemperaturefieldareanalyzedbymethodoffiniteelementduringtheplasmarupturingtoidentifythestructuredesignofthecryopump.Whenthepla

7、smarupturesthereiselectrodynamicfceonthetoidaltubeswhichwillgeneratelargestressonthebraces.Atfirsttheelectrodynamicfceofthecryopumpiscalculatedthenanalysisthestressofthebracesbycouplingtheelectrodynamicfieldstructuralfie

8、ld.Atlasttheresultshowsthatthestressislessthantheallowablestressofthematerialofbraces.Thedesignofcoolingsystemisthelastpartofthepaper.100W4.3Kliquidheliumisavailablefromheliumrefrigerationcycleofthecoolingsystemthatcompo