西南石油大学学报(自然科学版)
2015年12月第37卷第6期
JournalofSouthwestPetroleumUniversity(Science&TechnologyEdition)
Vol.37No.6Dec.2015
DOI:10.11885/j.issn.16745086.2013.12.10.03
(2015)06011908文章编号:16745086
中图分类号:TE832;O359+.1
文献标志码:A
预测气液两相分层流界面剪切应力的新方法
郑平1,赵梁2*,刘永铭1
1.辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001
2.四川大学水利水电学院水力学与山区河流开发保护国家重点实验室,四川成都610207
摘要:针对水平管气液两相分层流界面剪切应力的预测,建立了基于计算流体力学(CFD)方法的剪切滑移壁面模型,即将气液界面处理为固定的具有均匀剪切应力的水平滑移壁面。利用FLUENT软件模拟了气相流动,气液界面采用剪切滑移壁面边界条件,通过对比实验测量的气相流场分布得到气速和界面剪切收敛值,并由收敛值拟合得到界面摩擦因子与气相雷诺数的关联式。应用这一关联式的预测结果与实验间接测量值吻合较好,并且在气、液相雷诺数9400??ReG??50000和21000??ReL??30000范围内优于Taitel和Dukler与Sidi-Ali和Gatignol模型。表明剪切滑移壁面模型可以有效地控制关键参数,提高预测效率和精度,为CFD方法预测气液两相分层流界面剪切应力提供了新的思路。
关键词:气液两相分层流;CFD;界面摩擦因子;界面剪切应力;剪切滑移壁面模型
ANewMethodforPredictingInterfacialShearStressofStratified
Gas-liquidTwo-phaseFlow
ZhengPing1,ZhaoLiang2*,LiuYongming1
1.CollegeofPetroleumEngineering,LiaoningShihuaUniversity,Fushun,Liaoning113001,China
2.StateKeyLaboratoryofHydraulicsandMountainRiverEngineering,CollegeofHydraulicandHydra-electricEngineering,SichuanUniversity,
Chengdu,Sichuan610207,China
Abstract:AnewSlip-shearwallmodelbasedoncomputationalfluiddynamics(CFD)forpredictingtheinterfacialshearstressofstratifiedgas-liquidtwo-phaseflowinhorizontalpipeisestablishedinthispaper,inwhichtheinterfaceisconsideredasaflatslipwallwithuniformshearstress.ThegasflowfieldissimulatedbyFLUENT.Comparedwithexperimentalvaluesofgasvelocityproperties,theconvergencevaluesofgasflowrateandinterfacialshearstressareobtained,andanewconstitutiverelationofinterfacialfrictionfactorandgasReynoldsnumberisdeducedfromtheconvergencevaluesfitting.Andtheinterfacialshearstressispredicted,whichisingoodagreementwiththeexperimentaldata,andbetterthanthatofTaitel&DuklerandSidi-Ali&GatignolmodelswhenthegasReynoldsnumberisfrom9400to50000andtheliquidReynoldsnumberisfrom21000to30000.Theresultsshowthattheslip-shear-wallmodelcancontrolthekeyparameterseffectively,improvethepredictionefficiencyandaccuracy,andprovideanewapproachtothepredictionofinterfacialshearstressofstratifiedgas-liquidflowbyCFD.
Keywords:stratifiedgas-liquidtwo-phaseflow;CFD;interfacialfrictionfactor;interfacialshearstress;slip-shear-wallmodel网络出版地址:http://
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