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ID:32118766
大小:2.51 MB
页数:70页
时间:2019-01-31
《单振子双腔体v型管无阀压电泵的数值模拟与空化分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、单振子双腔体V型管无阀压电泵的数值模拟与空化研究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————————————————————————————————————————————————一江苏大学硕士学位论文
6、——————————————————————————————————.二——————————一符号表K:克努森数E:弹性模量,GPar:温度,。CD3:电位移分量,胁p:压强,n岛:电场强度分量,C/m2R:雷诺数dH:水力直径,肌∥:微水流的平均粘度‰:自由水的粘度P:密度,船/肌3lu:流体的运动粘度’,:速度,肌/s∥:介电常数,F/mC:电容,FK:机电耦合系数H,:压电陶瓷层的厚度,朋日::弹性基底层的厚度,/.tm置:压电陶瓷的半径,,,lm恐:弹性基底的半径,肌历£:应变w:挠度,小班聊:下标,弹性基底刀:下标
7、,压电陶瓷五:泊松比f:应力,砌931:压电常数,V·m/N础、.班:压电陶瓷的弹性柔顺常数M:弯矩,N.朋U:电压,yD:疲劳耗用系数吒:抗拉强度,MPaS:压电振子不同时刻位移,朋K:移动网格的速度F:扩散系数&:源项ay:控制体y的边界Q:体积流量,m3/hf:液体表面张力系数≯:空泡体积,,,13Ⅳ:单位容积内气泡数量%:气泡半径,所仃:空化数%:质量平均速度成:混合密度,堙/优3一F:体积力,仂/s2心:混合粘性系数V单振子双腔体V型管无阀压电泵的数值模拟与空化研究VI江苏大学硕士学位论文目录第一章缌}论⋯⋯⋯⋯⋯
8、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11.1弓I言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11.2压电泵简介⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11.2.1压电泵的特点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
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