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1、单振子双腔体V形管无阀压电泵的流场分析一排灌机械工程—一JournalofDrainageandIrrigationMachineryEngineeringl-一doi:10.3969/j.issn.1674—8530.2012.02.006单振子双腔体V形管无阀压电泵的流场分析何秀华,李富,毕雨时,邓志丹,王健(江苏犬学镜源譬动办l二翟学院,江苏镇江212013)摘要:为了提高泵送流量,获得连续,低脉动的输出特性,设计了一种单振子双腔体V形管无阀压电泵,并建立其几何模型,对其工作原理进行了简要介绍,采用Fluent软件的动网格模型对其内部流动进行数值分析.对
2、压电泵内部流场进行动态模拟,得到不同时期压电泵内部的压力,速度及瞬时流量等动态特征,将双晶片压电振子的动态特征和流体的运动特征有机地结合在一起,结果与压电泵的工作原理相吻合,验证了动网格模型应用于压电泵数值模拟计算的可行性.通过大量的数值模拟研究了驱动频率,压电振子振幅,泵腔高度和V形管位置对单振子双腔体V形管无阀压电泵输出性能的影响.模拟结果表明:驱动频率为250Hz时单振子双腔体V形管无阀压电泵的出口流量最大;压电振子振幅越大,出l=r流量越大;合理选择一组振幅值,泵腔高度和管道位置,便可得到压电泵的最优输出性能.关键词:压电泵;流场;输出性能;数值模拟;
3、可行性中图分类号:$277.9;TH311文献标志码:A文章编号:1674—8530(2012)02—0153—04AnalysisonflowfieldinV-shapevalve?lesspiezoelectricpumpwithsingleoscillator-dualchamberHeXiuhua,LiFu,BiYushi,DengZhidan,WangJian(SchoolofEnergyandPowerEngineering,JiangsuUniversity,Zhenjiang,Jiangsu212013,China)Abstract:Akind
4、ofV—shapevalve—lesspiezoelectricpumpwithsingleoscillator—dualchamberwasde-signedanditsgeometricmodelwascreated.ItsinternalflowswerenumericallyanalyzedbythedynamicmeshmodelinFluent.Theunsteadyflowfieldinthepiezoelectricpumpwassimulatedandthepumpunsteadycharacteristics,suchasinstantan
5、eouspressure,velocityandflowrateindifferentperiodsoftime.wereobtained.Ifthedynamiccharacteristicsofthetwo—chippiezoelectricvibratorwaseffectivelycombinedwiththefluiddynamics,theestimatedpumpperformancewouldagreewiththetheoreticalcharacteristicsofvalve?lesspiezoelectricpumps,itissugg
6、estedthatthedynamicmeshmodelisfeasi—bleinthenumericalsimulationsofflowinsuchapump.Theeffectsofdrivingfrequency,amplitudeofthepiezoelectricvibrator,pumpchamberheightandlocationoftheV—tubeonthepumpoutputper-formancewerestudiedbymeansofconsiderablenumericalsimulations.Thesimulationresu
7、ltsshowthatthemaximumoutletflowisobtainedatthedrivingfrequencyof250Hz.Moreover,thegreatertheamplitudeofthepiezoelectricvibrator,thehighertheoutletflow.Whenasetofamplitude,pumpchamberheightandV—tubelocationaredeterminedreasonably,theoutputofapiezoelectricpumpcangetthebestperformance.
8、Keywords:piezoelect
