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1、單振子雙腔體V形管無閥壓電泵的流場分析一排灌機(jī)械工程—一JournalofDrainageandIrrigationMachineryEngineeringl-一doi:10.3969/j.issn.1674—8530.2012.02.006單振子雙腔體V形管無閥壓電泵的流場分析何秀華,李富,畢雨時(shí),鄧志丹,王健(江蘇犬學(xué)鏡源譬動(dòng)辦l二翟學(xué)院,江蘇鎮(zhèn)江212013)摘要:為了提高泵送流量,獲得連續(xù),低脈動(dòng)的輸出特性,設(shè)計(jì)了一種單振子雙腔體V形管無閥壓電泵,并建立其幾何模型,對其工作原理進(jìn)行了簡要介紹,采用Fluent軟件的動(dòng)網(wǎng)格模型對其內(nèi)部流動(dòng)進(jìn)行數(shù)值分析.對
2、壓電泵內(nèi)部流場進(jìn)行動(dòng)態(tài)模擬,得到不同時(shí)期壓電泵內(nèi)部的壓力,速度及瞬時(shí)流量等動(dòng)態(tài)特征,將雙晶片壓電振子的動(dòng)態(tài)特征和流體的運(yùn)動(dòng)特征有機(jī)地結(jié)合在一起,結(jié)果與壓電泵的工作原理相吻合,驗(yàn)證了動(dòng)網(wǎng)格模型應(yīng)用于壓電泵數(shù)值模擬計(jì)算的可行性.通過大量的數(shù)值模擬研究了驅(qū)動(dòng)頻率,壓電振子振幅,泵腔高度和V形管位置對單振子雙腔體V形管無閥壓電泵輸出性能的影響.模擬結(jié)果表明:驅(qū)動(dòng)頻率為250Hz時(shí)單振子雙腔體V形管無閥壓電泵的出口流量最大;壓電振子振幅越大,出l=r流量越大;合理選擇一組振幅值,泵腔高度和管道位置,便可得到壓電泵的最優(yōu)輸出性能.關(guān)鍵詞:壓電泵;流場;輸出性能;數(shù)值模擬;
3、可行性中圖分類號:$277.9;TH311文獻(xiàn)標(biāo)志碼:A文章編號: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
