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1、2015年2月第33卷第2期Feb.2015Vol.33No.2doi:10.3969/j.issn.1674-8530.14.0048基于固液兩相流的紙漿泵磨損預(yù)測1212楊凌波,肖業(yè)祥,唐兵,王正偉(1.中國礦業(yè)大學(xué)(北京)機電與信息工程學(xué)院,北京100083;2.清華大學(xué)水沙科學(xué)與水利水電工程國家重點實驗室&熱能工程系,北京100084)楊凌波摘要:分別采用Euler-Euler和Euler-Lagrange兩相流模型對離心式紙漿泵進行了數(shù)值模擬,考慮葉輪間隙流動,預(yù)測了泵的磨損特性.歐拉方法采用Particle兩相流模型,壁
2、面的磨損程度與固相體積分數(shù)和滑移速度相關(guān).拉格朗日模型采用Finnie磨損預(yù)估模型.開式葉輪紙漿泵多個流量工況的計算結(jié)果顯示,歐拉方法預(yù)測的葉片和前蓋板在設(shè)計流量下磨損嚴重,壓水室在小流量工況時磨損嚴重.拉格朗日方法顯示葉片和前蓋板的磨損最嚴重,磨損率隨流量增加先增大后減小,壓水室和后蓋板的磨損率逐漸減?。?種模型預(yù)測的葉輪與前蓋板磨損嚴重的現(xiàn)象與實際吻合;拉格朗日模型可定量分析磨損部位和磨損程度等特性.本研究為紙漿泵的兩相流數(shù)值模擬和磨損特性研究提供了一定參考.關(guān)鍵詞:紙漿泵;開式葉輪;固液兩相流;數(shù)值模擬;磨損特性中圖分類號:S
3、277.9文獻標志碼:A文章編號:1674-8530(2015)02-0098-06楊凌波,肖業(yè)祥,唐兵,等.基于固液兩相流的紙漿泵磨損預(yù)測[J].排灌機械工程學(xué)報,2015,33(2):98-103,127.YangLingbo,XiaoYexiang,TangBing,etal.Predictionofpulppumperosioncharacteristicbasedonsolid-liquidtwo-phaseturbu-lentflow[J].JournalofDrainageandIrrigationMachineryE
4、ngineering(JDIME),2015,33(2):98-103,127.(inChinese)Predictionofpulppumperosioncharacteristicbasedonsolid-liquidtwo-phaseturbulentflow1212YangLingbo,XiaoYexiang,TangBing,WangZhengwei(1.SchoolofMechanicalElectronicandInformationEngineering,ChinaUniversityofMiningandTechn
5、ology,Beijing100083,China;2.StateKeyLaboratoryofHydroscienceandEngineering&DepartmentofThermalEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Euler-EulerandEuler-Lagrangetwo-phasemodelswereappliedtosimulatetheturbulentflowinthepulppumpandtopredicttheerosion
6、characteristicsconsideringtheimpactoftipclearance.EulermultiphasemodeluseParticlemodeltoanalyzetwo-phaseflow,thewallwearwasmainlyaffec-tedbytheslipvelocityandthefractionofvolumeofsolidparticles.LagrangemultiphasemodelwasappliedtopredictthewearquantitybasedonFinnieerosi
7、onmodel.Theresultofpulppump'sopenimpellerunderdifferentdischargeconditionsshowthat,theEulermodelpredictedbladeandfrontco-verwearseriouslyunderthedesignflowrate,casewearseriouslyunderthesmallflowrate.TheLa-grangemodelrevealedthebladeandfrontcoverwearseriously,foundthewe
8、arrateofbladeandfrontcoverincreasedandthendecreasedwiththedischargerising,thewearrateofbackcoverandcasingdecreasedgra