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1、單振子雙腔體V型管無閥壓電泵的數(shù)值模擬與空化研究4.Clanguageisusedtoaprogramofthedynamiccharacteristicsofpiezoelectricvibrator,andthentheprogramiscalledinFluentwithdynamicmeshmodeltocalculate.Then,throughtheindirectcouplingmethod,dynamicnumericalsimulationisdonetothevalve-lesspiezoelectric
2、micropumpwithsinglebimorph—doublechambersandVshape—tube.Internalflowfieldofthepiezoelectricmicropumpisobtained,itdemonstratesthatitisfeasibleandrighttousedynamicmeshmodeltosetthevibratormovingboundary.Dynamicmeshmodelisalsousedtostudyeffectsofdrivingfrequency,ampli
3、tudeofthepiezoelectricvibrator,pumpchamberheightandpipelinelocationtopumpingofthepiezoelectricmicropump,whichprovidesabasisandreferencevalvetodesignthepiezoelectricmicropump.5.Thetheoryofcavitationisintroduced.Dynamicnumericalsimulationisdonetothevalve--lesspiezoel
4、ectricmicropumpwithsinglebimorph--doublechambersandVshape—tubeusingtheMixturemodelinFluent.Thedistributionofgas-liquidandcavitationaleobtainedandstudied.Moreover,painstakinglymeasuresadoptedcaninhibiteffectivelythegenerationbubbleinthepiezoelectricmicropump,thusenh
5、ancingperformancesofthepiezoelectricmicropump.Keywords:valve-·lesspiezoelectricmicropumpwithsinglebimorph··doubleIVchambersandVshape-tube,fatigueanalysis,dynamicmeshtechnology,cavitation,numericalsimulation————————————————————————————————————————————————一江蘇大學(xué)碩士學(xué)位論文
6、——————————————————————————————————.二——————————一符號表K:克努森數(shù)E:彈性模量,GPar:溫度,。CD3:電位移分量,脅p:壓強,n島:電場強度分量,C/m2R:雷諾數(shù)dH:水力直徑,肌∥:微水流的平均粘度‰:自由水的粘度P:密度,船/肌3lu:流體的運動粘度’,:速度,肌/s∥:介電常數(shù),F(xiàn)/mC:電容,F(xiàn)K:機電耦合系數(shù)H,:壓電陶瓷層的厚度,朋日::彈性基底層的厚度,/.tm置:壓電陶瓷的半徑,,,lm恐:彈性基底的半徑,肌歷£:應(yīng)變w:撓度,小班聊:下標(biāo),彈性基底刀:下標(biāo)
7、,壓電陶瓷五:泊松比f:應(yīng)力,砌931:壓電常數(shù),V·m/N礎(chǔ)、.班:壓電陶瓷的彈性柔順常數(shù)M:彎矩,N.朋U:電壓,yD:疲勞耗用系數(shù)吒:抗拉強度,MPaS:壓電振子不同時刻位移,朋K:移動網(wǎng)格的速度F:擴散系數(shù)&:源項ay:控制體y的邊界Q:體積流量,m3/hf:液體表面張力系數(shù)≯:空泡體積,,,13Ⅳ:單位容積內(nèi)氣泡數(shù)量%:氣泡半徑,所仃:空化數(shù)%:質(zhì)量平均速度成:混合密度,堙/優(yōu)3一F:體積力,仂/s2心:混合粘性系數(shù)V單振子雙腔體V型管無閥壓電泵的數(shù)值模擬與空化研究VI江蘇大學(xué)碩士學(xué)位論文目錄第一章緦}論?????
8、?????????????????????????????????11.1弓I言??????????????????????????????????????11.2壓電泵簡介??????????????????????????11.2.1壓電泵的特點????????????????????