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《超临界和超超临界汽轮机转子叶根槽传热系数的计算.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第30卷第7期动力工程学报V01.30No.72010年7月JournalofChineseSocietyofPowerEngineeringJuly2010文章编号:1674—7607(2010)07—0478—07中图分类号:TK229.2文献标识码:A学科分类号:470.30超临界和超超临界汽轮机转子叶根槽传热系数的计算史进渊,邓志成,杨(上海发电设备成套设计研究院,上海宇200240)摘要:提出了超临界和超超临界汽轮机转子叶根槽传热系数的计算方法:采用单层圆筒壁、多层圆筒壁与多层平壁模型计算叶根
2、的传热热阻,采用串联热阻叠加原则计算叶根热传递过程的总热阻,并依据叶根的总热阻和叶根槽承力齿的面积计算叶根槽的传热系数.介绍了倒T型叶根槽、双倒T型叶根槽、又型叶根槽和纵树型叶根槽传热系数的计算方法,并给出了600MW超临界汽轮机高压转子叶根槽传热系数的定量计算结果.在超临界和超超临界汽轮机转子温度场和热应力场的有限元计算中,该计算方法为确定转子叶根槽的传热边界提供了依据.关键词:超临界汽轮机;转子;叶根槽;传热系数;计算公式CalculationofHeatTransferCoefficientsof
3、BladeGroovesforSupercriticalandUltra—supercriticalSteamTurbineRotorsSHIJin—yuan,DENGZhi—cheng,YANGYu(ShanghaiPowerEquipmentResearchInstitute,Shanghai200240,China)Abstract:Acalculationmethodoftheheattransfercoefficientofbladegroovesforsupercriticalandultr
4、a-supercriticalsteamturbinerotorsispresented:firstlytheheattransferthermalresistanceofbladerootsiscalculatedbyusingthemodelofmonolayercylinderwall,multilayercylinderwallandmultilayerplanewall;thenthetotaltransferthermalresistanceofthebladerootsiscalculat
5、edbytheadditionprincipleofseriestransferthermalresistance;afterthattheheattransfercoefficientsofbladegroovesarecalculatedbyuseofthetotaltransferthermalresistanceofbladerootsandthesurfaceareaoftheteethinbladegroovewhichsufferedthecentrifugalforces.Thecalc
6、ulationmethodoftheheattransfercoefficientfortheinvert—edT—typebladegroove,thedoubleinvertedT-typebladegroove,thefork—typebladegrooveandthefir-tree-typebladegrooveareintroduced.Thecalculatingresultsofquantificationfortheheattransfercoeffi—cientofthehighpr
7、essurerotorsbladegroovesofasupercritical600MWsteamturbinearegiven.Thepro—posedmethodsuppliesthebasisfordeterminingtheheattransferboundaryoftherotorsbladegrooveinfi—niteelementanalysisfortemperatureandthermalstressfieldsofsupercriticalandultra—supercritic
8、alsteamturbinerotors.Keywords:supercriticalsteamturbine;rotor;bladegroove;heattransfercoefficient;calculationformula收稿日期:2009-05—12修订日期:2010—03-09基金项目:国家高技术发展计划(863计划)资助项目(2007AA042429);上海市优秀学科带头人计划资助项目(08XDl4227)作者简介:史进渊(
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