交變振蕩流回?zé)崞鞯膶?shí)驗(yàn)研究.pdf

1、華中科技大學(xué)碩士學(xué)位論文交變振蕩流回?zé)崞鞯膶?shí)驗(yàn)研究姓名：廖宜利申請學(xué)位級別：碩士專業(yè)：制冷及低溫工程指導(dǎo)教師：張曉青20110107華中科技大學(xué)碩士學(xué)位論文IIAbstractRegeneratasaheartinstirlingthermoacousticstirlingisacrucialaspectfimprovingstirling’sefficiency.Withtheprogressingoftodays’stirlingt

2、hermoacousticstirlingmedeepunderstingofnatureofregeneratisanewlyacademicopinion.Thepreviousexperimentalresultscrelativefmulasbothbasingonsteadyflowconditionarenotenoughtopredictrealisticsituation.Infactregeneratisusedund

3、eroscillatyflowacteristicsofflowheattransferinregeneratmatrixaredifferentfromthoseundersteadyflow.Especiallywhenregeneratisusedunderhigheroscillatyfrequencyexperimentalresultdeviationismeobviousundersteadyflowthanunderos

4、cillatyflow.Thiswkisintenttodesigntestrigsperfmexperimentalinvestigationonacteristicsofflowheattransferacousticpowerconversioninregeneratunderoscillatyflow.Inthebeginningadynamicpressuretestrigwhichsimulatedtherealisticw

5、kingconditionthatregeneratwkedwasdesignedtoinvestigateregeneratpressureacteristicsunderoscillatyflow.Furthermesomevaluableresultsfromregeneratwithdifferentpositydifferentpackedlengthdifferentpackedpatterntemperaturediffe

6、rencewasgiven.Muchefftwasalsoemployedtotentativelystudyaxialthermalconductionaxialenergyfluxintheregenerat.Theexperimentalresultsdemonstratedthatthedynamicpressureofscreentyperegeneratislinearlyrelatedtothepositythelengt

7、hofregeneratbutisnotobviouslycrelativetothepackedpatternofregeneratunderotherconditionsunchangedBesidesthedynamicpressureofregeneratincreaseswiththetemperaturedifferenceacrosstheregenerathoweverithasnoobviousrelationwith

8、theientationoftemperaturechange.Alsobasingonthefactthatthermoacousticstirlingperfmanceiseffectedtoalargeextentbythermoacousticacteristicsofregeneratathermoacousticstirlingacousticpoweramplifierwasdesignedwiththeaimatunde

9、rstingtheacousticpoweramplificationfrequencychoiceacteristicsofregenerat.Besidessomesenssinstrumentsusedinexperimentalwkarecarefullyintroduced.Someauxiliaryexperimentalrigwasalsodevelopedfcalibrationofsenssinstrumentsthe