資源描述：
《旋轉(zhuǎn)帶肋回轉(zhuǎn)通道流動(dòng)換熱數(shù)值模擬.pdf》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、第48卷第2期西安交通大學(xué)學(xué)報(bào)Vo1．48NO．22014年2月JOURNALOFXI’ANJIAOTONGUNIVERSITYFeb．2O14DOI：10．7652／xjtuxb201402021旋轉(zhuǎn)帶肋回轉(zhuǎn)通道流動(dòng)換熱數(shù)值模擬趙曙，朱惠人，郭濤，張麗，孫瑞嘉。(1．西北工業(yè)大學(xué)動(dòng)力與能源學(xué)院，710072，西安；2．中國(guó)航空動(dòng)力機(jī)械研究所，412002，湖南株洲)摘要：為進(jìn)一步了解渦輪動(dòng)葉旋轉(zhuǎn)內(nèi)冷通道的流動(dòng)換熱規(guī)律，選取動(dòng)葉內(nèi)通道的相似放大模型進(jìn)行實(shí)驗(yàn)和數(shù)值模擬研究。通道進(jìn)口雷諾數(shù)為17000，3個(gè)
2、出口的流量分配比為1：2：1，旋轉(zhuǎn)半徑與水力直徑比為46．4，旋轉(zhuǎn)數(shù)分別為0和0．09。靜止實(shí)驗(yàn)測(cè)量了沿程靜壓系數(shù)和努賽爾數(shù)(Nu)分布，三維數(shù)值模擬了旋轉(zhuǎn)通道內(nèi)部渦結(jié)構(gòu)對(duì)流動(dòng)換熱的影響。結(jié)果表明：旋轉(zhuǎn)造成通道渦偏移，改變了速度場(chǎng)分布，使哥氏力指向的壁面附近流速增加；旋轉(zhuǎn)離心力使徑向出流沿程靜壓系數(shù)逐漸增加，徑向入流沿程靜壓系數(shù)迅速降低；肋擾流渦使沿程展向平均Nu呈多波峰狀分布；轉(zhuǎn)彎回流渦使得轉(zhuǎn)彎下游通道的Nu不對(duì)稱分布；旋轉(zhuǎn)促使內(nèi)通道的流體偏向哥氏力指向的壁面，增加了徑向出流壓力面和徑向入流吸力面的N
3、u。關(guān)鍵詞：渦輪葉片；帶肋通道；旋轉(zhuǎn)；對(duì)流傳熱；數(shù)值計(jì)算中圖分類號(hào)：V231．1文獻(xiàn)標(biāo)志碼：A文章編號(hào)：0253-987X(2014)02—0125—06NumericalPredictionsofFlowandHeatTransferforRotatingInternalCoolingChannelswithRibTurbulatorsZHAoShu，ZHUHuiren，GUOTao，ZHANGLi，SUNRuijia。(1．CollegeofPowerandEnergy，NorthwesternPo
4、lytechnicalUniversity，Xi’an710072，China2．ChinaAviationPowerMachineryResearchInstitute，Zhuzhou，Hunan412002，China)Abstract：Toinvestigateflowandheattransferinarotatinginternalchannelofthemovingblade，experimentsandnumericalsimulationsforasimilarlyamplifiedch
5、annelmodelwith90。ribsareconducted．TheinletReynoldsnumber，flowratedistributionratioandgeometricdimensionlessratioaretakenas17000，1：2：1and46．4respectively，therotatingnumberisconsideredas0and0．09．Theheattransfercoefficientdistributionandstaticpressurecoeffi
6、cientareexaminedbyexperiments．Theeffectsofvortexonflowandheattransferinrotatinginternalcoolingpassageareachievedwith3-Dnumericalsimulation．Theresultsshowthatvortexshiftinrotatingchannelchangesvelocityfield，andthestaticpressurecoefficientincreasesalongrad
7、ialoutflowanddecreasesalongradialinflowduetocentrifugalforce．ThelaterallyaveragedNudistributesinmultiple—peakformastheresultofsecondaryflowinducedbyribturbulators．TheNudistributiondownstreamofturningareagetsasymmetricduetoturningeddy．Thefluidshifttendsto
8、wardthewallthattheCoriolisforcepointsto．Consequently，theNuontheradialoutflowpressuresurfaceandradialinflowsuctionsurfaceincreases．Keywords：turbineblade；ribbedchannel；rotating；convectiveheattransfer；numericalSjmu1ation收稿日期：
