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1、2013年9月农业机械学报第44卷第9期doi:10.6041/j.issn.1000鄄1298.2013.09.049*无阀压电泵用椭圆组合管正交优化设计与试验1222邓志丹摇何秀华摇杨摇嵩摇李摇富(1.江苏大学理学院,镇江212013;2.江苏大学能源与动力工程学院,镇江212013)摘要:为了提高无阀压电泵中流管的流阻特性,提出一种新型椭圆组合管结构。该流管为三通结构,汇流管是传统扩散/收缩管,分流管是椭圆曲线结构的扩散/收缩管。通过数值模拟,应用正交方法优化椭圆组合管的结构参数。设计选用的汇流管最小宽度d=150滋m,流管深度H=150滋m,优化
2、结果表明当进出口压差为50kPa时,结构尺寸为r=75滋m,L=3000滋m,兹=7毅,酌=80毅,a=1000滋m,b=450滋m的椭圆组合管有最高的正反向流阻系数比姿。通过MEMS技术制作出优化后的椭圆组合管并进行试验,并与数值模拟结果对比。结果表明:试验值小于模拟值,压差在10~100kPa范围内,正向流量试验值与模拟值最大相差12郾6%,反向流量两者最大相差5郾3%;压差为50kPa时,两者的姿值分别为1郾83和1郾97,相差7郾65%。关键词:压电泵摇椭圆组合管摇数值模拟摇正交试验中图分类号:S277郾9;TH38文献标识码:A文章编号:100
3、0鄄1298(2013)09鄄0284鄄05OrthogonalOptimizationDesignandExperimentofOvalCompositeTubeinValvelessPiezoelectricPump1222DengZhidan摇HeXiuhua摇YangSong摇LiFu(1.FacultyofScience,JiangsuUniversity,Zhenjiang212013,China2.SchoolofEnergyandPowerEngineering,JiangsuUniversity,Zhenjiang212013,Chin
4、a)Abstract:Inordertoimprovethecharacteristicsofflowresistanceinthevalvelesspiezoelectricpump,amicro鄄flowtubecalledovalcompositewaspresented.It爷sakindofthree鄄waytube,ofwhichbranchtubewascomposedofovalnozzle/diffuserelementsandconvergingtubewascomposedoftraditionalnozzle/diffuserel
5、ements.Inthenumericalsimulation,theorthogonaloptimizationwasappliedtoobtainparametersoftheproposedtube.Theminimumwidthofconvergingtubedwas150滋mandthedepthofthetubeHwas150滋m.Theoptimizationresultsshowedthatwhenthepressuredifferencebetweentheinletandoutletwasfixedat50kPa,thehighest
6、coefficientofpositiveandnegativeflowresistance姿wasachievedwithoptimizationparametersofr=75滋m,L=3000滋m,兹=7毅,酌=80毅,a=1000滋m,b=450滋m.Then,theoptimizedcompositetubeswereproducedthoughMEMSprocessingtechnologyandtheexperimentswerecarriedoutandcomparedwiththenumericalsimulations.Theresu
7、ltsshowedthattheexperimentalvaluewaslessthansimulatedvaluewithpressuredifferenceof10~100kPa.Thepositivelargestmassflowdifferencebetweentheexperimentandsimulationwas12郾6%,andthenegativewas5郾3%.Whenthepressuredifferencewas50kPa,姿was1郾83(positive)and1郾97(negative)withdifferenceof7郾6
8、5%.Keywords:Piezoelectricpump摇Ovalcompos
