高翼螺旋钻杆内部气固两相流动数值分析

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CoalMineMachineryVol.39No.05May.20183905201805doi:10.13436/j.mkjx.2018050260,、、,。,,。,、。,,1,2,2,2(1.,611130;2.,730050):,Euler-Euler,,。,400r/min,,600r/min,,,。,,,,,,。,,。400r/min,,,,,。600r/min,,,。:;;;;:TD421:A:1003-0794(2018)05-0074-05NumericalAnalysisofGas-solidTwo-phaseFlowinHighAirfoilSpiralDrillPipeJIANGXiao-qin1,SONGYa-juan2,WANGZheng-kai2,LIYi-bin2(1.SichuanVocationalandTechnicalCollegeofCommunications,Chengdu611130,China;2.CollegeofEnergyandPowerEngineering,LanzhouUniversityofTechnology,Lanzhou730050,China)Abstract:Inordertostudytherelativephysicalparametersofgas-solidtwo-phaseflowinhigh-wingspiraldrillpipe,Euler-Eulermultiphaseflowmodelisusedtosimulatethewholeflowfieldofthehigh-wingspiraldrillpipeunderdifferentrotationspeeds.Thenumericalsimulationshowsthattheinternalvelocitydistributionandpressuregradientareuniformat400r/min.Whentherotatingspeedis600r/min,thepressurediscontinuityoccursintheaxialmiddlesectionandthepressureinthesectionchangessuddenly.Theinternalflowfieldisdisordered.Theinternalpressureofthespiraldrillpipefrominlettooutletisapproximatelylinearincreasetrend,thehigherthespeed,thehigherthepressuregradient,pressuredifferencebetweentheinletandoutletishigher.Asthespeedincreases,theintermediatecross-sectionvelocityincreases,andthestaticfieldvelocityisgreaterthanrotationaldomainvelocity.Asthespeedincreases,thevelocityofparticlephaseincreasesinturn,andthemaximumvelocityoftheparticlephaseislessthanthemaximumvelocityofthecontinuousphase.Whentherotatingspeedis400r/min,particlesaremostlydistributednearthedrumwall,thatis,staticfield,whilelessdistributedwithintheauger.Undertheactionofinertiaforce,particlesareattachedtothespiraldrillpipewall,andtheparticlevolumefractionismoreuniform,andtheefficiencyofthepushflowishigher.Whentherotatingspeedis600r/min,thevolumefractionofparticlesnearthemiddleofthestaticfieldishigher,andthegas-solidtwo-phaseflowdistributioninsidethespiraldrillpipeisextremelynonuniform,showingthesignificantinstabilityofgas-solidtwo-phaseflow.Keywords:spiraldrill;Euler-Eulermodel;gas-solidtwophaseflow;pressuredistribution;numericalsimulation743905Vol.39No.05———,、,,。,,,,,,、,,。,,,,,。,,,。,Euler-Euler,。1(1),:准63.5mm,准110mm,准130mm,1500mm,75mm,6mm,1。,,。2,,,。121.2.:():/kg·m-31.185/(Pa·s)1.83×10-5():/kg·m-31350/(Pa·s)1.83×10-50.64/m0.0010.95GidspowGidspow,。,SSTκ-ω,。(2)Euler-Euler:Euler-LagrangeEuler-Euler。,,,Euler-Lagrange,Euler-Euler。Euler-Euler,,,,,,。,Euler-Lagrange,Euler-Euler,,Euler-Euler。,。,()。坠坠t(εiρi)+(εiρiui)=0(1)坠坠t(εiρiui)+(εiρiuiui)=-εiρg+(Ei-Eif)+Fi+εiρgn(2)i———,i=g,i=s;ε———;ρ———;u———();f———;Fi———;Ei———。(2),、、。Fi=β(us,i-ug,i)(3)β=34CDεsεgρs|vg-vs|dsf(εg)(4)β———;ds———,m;CD———;f(εg)———。,Euler-Euler,,ΔΔΔΔ12753905Vol.39No.05———,,1.83×10-5Pa·s,;,,3:、。,0.95;,,,0.64,0.64,Gidspow。(3)ICEMCFD。3。,O,,Y。,,,,1,90°,。,,,350,,。(a)(b)O(c)Y3(4)、,,,,,,1×10-4。,2,。GeneralConnection,。,Stage。,,,,1.1835kg/m3,0.6,0.4,0.05m/s。2(1)200~800r/min7,,,500r/min,,;500r/min,,。4,,,,200~500r/min,,600r/min,,,,,。,,,。,。Z(0.25、0.75、1.25m)3,。(a)n=400r/min(b)n=600r/min45,,,,;,,。,,,。51.n=200r/min2.n=300r/min3.n=400r/min4.n=500r/min12340.20.40.60.81.01.21.4z/mp/Pa0-50-100-150-200-250-300763905Vol.39No.05———,(2)6400r/min,600r/min,。,Z(),,400r/min,600r/min,。。,,,400r/min,,600r/min,。,0。,,。(a)n=400r/min(b)n=600r/min67400r/min、600r/min,,,;,,。600r/min,。,Z,,。(a)n=400r/min(b)n=600r/min7(3)8400r/min、600r/min,400r/min,,,,,,。600r/min,,,。(a)n=400r/min(b)n=600r/min89,400r/min、600r/min,,400r/min,,600r/min,,。,,0.64。(a)n=400r/min(b)n=600r/min93,:(1)400r/min,,;,,,,600r/min,,,;(2)sand.VelocityPlane92.7272.2521.7771.3010.826[ms^-1]sand.VelocityPlane914.74611.0687.3893.7100.031[ms^-1]773905Vol.39No.05———,。,,,400r/min,,600r/min,。,,;(3),,。400r/min,,;。400r/min,,。600r/min,,。:[1],.[J].,2016,44(1):47-54.[2],,,.[J].,2017,33(2):65-68.[3],,.Ansys[J].,2014(3):53-56.[4],,,.MATLABABAQUS[J].,2012(10):10-13.[5],,,.MATLABEDEM[J].,2017,36(9):255-258.[6].-CFD[M].:,2004.[7],,.-[J].,2012,22(10):126-132.:(1976-),,,,,:,:jiangxiaoqin1996@aliyun.com;1043744901@qq.com;:,:liyibin58@163.com.::2018-02-2878

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