rijke型大振幅驻波管声学特性与降噪研究

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1、浙江T业人学硕I：学位论文RijkeTypeBigoscillationStandingWavePipeAcousticsCharacteristicandNoiseReductionABSTRACTTheRijkepipeisanimportantheatacousticmechanism．Itcanusetheheatenergywhichislowqualityenergytodrivethemechanism．Theworkingfluiddidn’tdamagethecircumstance．TheRijkepipe’Snatur

2、allifeisverylonganditcanimproveheattransferandburningefficiencyItalsocanreduceNOx．ThepurposeofthisthesisareanalyzingtheRijkepipe’Sself-excitedmechanismandresearchingnozzleeffecttoreducethenoiseofRijkepipetobreachtheengineeringconstrict．Thethesisgivesanewhypothesisaboutther

3、elationshipbetweentheairsaroundheatsource’sunstableheatreleaseandoscillationpressure，oscillationvelocity．Therearetwoforceoscillations．Oneisappendingheatsourcesdecidedbytimetheotherisappendmanualtemperaturegrads．Thisthesisdoesn’tusetheseforcedtriggeringmechanismsbutComplete

4、theRijkenumericalsimulationrelyontheparameterwithouttimepart；itisagreementwiththefactwhichRijkeisaself-excitedmechanism．ThethesissimulatesRijkeandthespaceconnectstoittoreplacetraditionmethodswhichonlyresearchRijkeitself．Andanalysisphysicsphenomenon．Givethereasonableexplain

5、．Thethesisusesexperimenttoprovethesimulation．ThenumericalexperimentpaymoreattentiontoRijkepipe’Snozzleeffectforreducethenoise．AtlastthethesissumupnoisereductionmethodsforRijkepipewhichnoiseislow第1II贝浙江丁业人学颂Jj学位论文frequencybigoscillationvalueandloudnoise．Inthesemethoditcontm

6、nnewmethodcalled1／4wavelengthpipe．Thisthesisreviewsexistingresearchincludeanalyticalmethodnumericalsimulationandexperiment．ItalsogivesanewhypothesisandofferstheexplanationoftheRijkepipe’Sself-excitedmechanism．Theconclusionisagreementwiththeexperiment．Alltheseworkisthebaseo

7、fdeeperresearchoftheRijkepipe．Keyword：Rijkepipe，numericalsimulation，heatsourcemodule，nozzleeffect，self-excited，noisereduction第1V畎浙江工业大学学位论文原创性声明本人郑重声明：所提交的学位论文是本人在导师的指导下，独立进行研究工作所取得的研究成果。除文中已经加以标注引用的内容外，本论文不包含其他个人或集体已经发表或撰写过的研究成果，也不含为获得浙江工业大学或其它教育机构的学位证书而使用过的材料。对本文的研究作出重要贡

8、献的个人和集体，均已在文中以明确方式标明。本人承担本声明的法律责任。作者签名：张J司／f多-日期：跏6年岁月，7日学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学