摘要
Inthisstudy,acontinuousandairtighttwinspiraldryerwasdevelopedinaccordancewiththecharacteristicsandchallengesintheprocessofdisposingpolysiliconslurry.Computationalfluiddynamics(CFD)simulationswereusedtoinvestigatetheflowfieldintherotatingtwin-spiralcontinuousdryerandanoriginaldiscretephasemodelwasalsoelaboratedtocomparewiththecold-modelingexperimentalresults.Thecorrespondingflowfieldwasobtainedusingtheavailableinletvelocityof0.05-0.3m/sandtherotationalspeedoftheinnerconeof12-44r/min,theresidencetimedistribution,andtrackedparticlestrajectory.Resultsshowedthattheresidencetimeofthetracerparticlesintheconecylinderwasabout15.8-25.4%ofthetimespentoutofit,andtheparticle'sresidencetimewasmuchshorterincontrasttotherotationalspeedandinletvelocity.Theexternalribbonhadalargerinfluenceonthefluid,therebyleadingtoalargervelocityintheregionoutsidetheconecomparedtothatintheregioninsidethecone.Inaddition,theappearanceofthevortexandboundarylayerseparationatthebackoftheribbonandthespokebarhadsecondarydiversioneffectsonthefluid.Furthermore,theinletvelocityhadlittleinfluenceontheflowfieldwhiletherotationalspeedoftheconegreatlyaffectedtheflowfield.Hence,theCFDsimulationsshowedgoodagreementwiththeexperimentalresults.
出版日期
2017年06月16日（中国期刊网平台首次上网日期，不代表论文的发表时间）
