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1、第38卷第1期工程熱物理學(xué)報(bào)Vol.38,No.l2017年1月JOURNALOFENGINEERINGTHERMOPHYSICSJan.,2017對(duì)轉(zhuǎn)壓氣機(jī)葉頂間隙渦非定常數(shù)值研究王掩剛陳為雄陳俊旭西北工業(yè)大學(xué)動(dòng)力與能源學(xué)院,西安710072()摘要以雙排對(duì)轉(zhuǎn)壓氣機(jī)為研究對(duì)象,研究了葉頂間隙對(duì)對(duì)轉(zhuǎn)壓氣機(jī)性能參數(shù)的影響規(guī)律.針對(duì)大葉頂間隙時(shí)對(duì)轉(zhuǎn)壓氣機(jī)性能嚴(yán)重惡化問題,從非定常的視角刻畫了大葉頂間隙下,工作點(diǎn)變化對(duì)其內(nèi)部流動(dòng)特征的影響規(guī)律,結(jié)果表明:隨
2、著流t減小,對(duì)轉(zhuǎn)壓氣機(jī)中上、下游轉(zhuǎn)子葉尖泄漏渦非定常波動(dòng)均有增強(qiáng)趨勢(shì),下游轉(zhuǎn)子首發(fā)失速是對(duì)轉(zhuǎn)壓氣機(jī)流動(dòng)失穩(wěn)的主要誘因。小流M工況下,葉頂主間隙泄漏渦與次泄漏渦的非定常干涉是下游轉(zhuǎn)子內(nèi)部非定常波動(dòng)的主要成因;該工況時(shí),下游轉(zhuǎn)子葉頂間隙渦非定常周向波動(dòng)強(qiáng)度強(qiáng)于徑向波動(dòng)強(qiáng)度50%,其影響范圍也主要表現(xiàn)在葉頂前緣弦長(zhǎng)范圍內(nèi)D頻譜分析顯示,上游轉(zhuǎn)子葉尖泄漏渦非定常波動(dòng)頻率略小于下游轉(zhuǎn)子區(qū),下游轉(zhuǎn)子區(qū)靜壓波動(dòng)幅值約為上游轉(zhuǎn)子的5倍。關(guān)鍵詞對(duì)轉(zhuǎn)壓氣機(jī);葉頂間隙渦;非定常波動(dòng)-1--中圖
3、分類號(hào):V231.3文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):0253231X20170009307()ofTrans-StudyientTipLeakageVortexCharacteristicsinaContraRotatingCompressorWANGYan-GangCHENWei-XiongCHENJun-XuX'NorthwesternPolytechnicalUniverstchoolofPowerSzEnerian70072iy,S
4、,1(gy)AbstractAna-xialcontrarotatingcomressorACRChasbeenstudiedbnumericalsimulationtop()yiiatetheeffectsofthetlTCfA.ThdlnvestgipcearancesizesSontheerformanceoCRCeetaiedflow()pcharacteristicsofthecompressoratdif
5、ferentoperatingpointswithlargerTCShavebeenanalyzedviatransientnumericalsimulationmethodtoexplainthephenomenonthattheperformanceoftheACRCtendstodeteriorateseriouslwiththeincreasinoftheTCS.Theconclusionsareasfollow
6、s:ygTheunsteadyfluctuationsofthetipclearanceleakagevortexbothintheupstreamanddownstream.Besrotorsenhanceasthemassflowratereducesraduallideshedoseamrotothegy,twntrrentersstateofstallearlierandinducesthestall
7、ofthewholecompressor.Whenthecompressorworksattheoeratingointwithsmallermassflowratetheinteractionbetweenthemaintlicearanceleakaepp,pgvortexandthesecondarleakaevortexcausesthetransygientfluctuationofthedownstream
8、rotor.Moreovertheunsteadfluctuantintensitofthedownstreamrotoralonthecircumferentialdirection,yygisstronerthanthatalontheradiusdggirectionandtheinvolvedareaoftheleakaeflowismainlin,gyfrontof50%bladetipchord.T