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:2000-06-22;:2000-09-26:(1975-),,,.:1001-2060(2001)03-0263-05W,,,,(,710049):FWW,,,,,,:W;;;:TK223:A1,,(Vdaf10%),W,,()FWW,,,,,(,),,,,,,()()(,EF),,,2,,,,,,Fr,Pr,,:(1)()300MWW,1:20(2)(ReRecr)(3),Re,ReRe[1]Re,,,,ReRe,EuRe16(93)20015©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.111,Re1j415104,Re5104,2TSI1050A3,,,,AD,,,,1-;2-;3-;4-;5-;6-AD;7-;8-;9-23,,1,131/ms-1/ms-1/ms-1W1WFQWYQDW2,DEW2,EFW2,FW3M:M2,D:M2,E:M3:M2,F123.187.127.737.737.737.7319.451:0.25:0.33:1.33:0.85223.187.127.737.737.737.7301:0.25:0.33:0:0.085337.57.127.737.737.737.7319.451:0.1:0.14:0.55:0.354,:(1)3x,y,zX=x/d1,Y=y/d1,Z=z/d1,d1(2)vzs,vzsz=F1v21+FFQv2FQ+F2,Av22,A+F2,Bv22,B+FYQv2YQA1+AFQ+A2,A+A2,B+AYQv1vFQv2,Av2,BvYQAB;A1AFQA2,AA2,BAYQ(3):,=F1/F01,F1,F4.14622001©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.4,H,,5m/s,,,,L,CH=L/H,,,,CH=01375;,,,,,,,CH=0158,0137501584,515,4,,DEFEF,,W,,,5,,CH=01404,,,,,,,,,,24,,5,,CH=01584,,,,,,W,,,,,,,,,,,,5623,:W©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.31,,4,3715m/s,W,15,CH=01404,11,,4.2Y6Y1W,,,,,,,WZ,Z,2,,,F,,F,,5,Y6Y4.377,,,,014016,,,,,,,,,,,,,12,(),,3,(281)6622001©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,,,,,,,,,5,,,,:(1),,,,(2),,,:[1],,,.[J].,1996,16(2):9-13.[2],,,.600MW[J].,1999,19(2):37-40.[3],,.[J].,1999,19(2):19-23.[4],,.[J].,2000,31(3):27-29.[5],,,.[J].,1996,24(11):107-109.()(266)5(1),,W,,,,M:M2,D:M2,E:M3:M2,F1:0125:0133:1133:0185(2)(),1,W,,(3),,M:M2,D:M2,E:M3:M2,F1:011:0114:0155:0135:[1],,.W[J].,1994,14(1):27-32.[2],[M].:,1982.[3].[M].:,1987.[4].[M].:,1990.[5].[M].:,1990.()1823,:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.alkalimetallicoxidesontheNOreduction,theauthorshavespeciallyinvestigatedtheeffectofbituminouscoalcharafteritsbeingsubjectedtoanimpregnatedcatalysttreatmentontheNOreburningprocessandNOreductionrate.ThetestwascompletedataninitialconcentrationofNOat10001026andunderreactiontemperaturesof900and1100re2spectively.ThetestresultsindicatethatthemetallicoxidesinthecoalashhaveaverystrongcatalyticactiononNOinthereburningzone.ThebituminouscoalcharoriginallybelievedtohaveaverypooreffectonNOreductioncanexerciseagreatinfluenceonheterogeneousreductionofNOafteracheapcatalystbeingaddedtotheabove2mentionedcoalchar.Undertheconditionofanappropriatereactiontemperatureandstoichiometricratio(SR)thecatalystinthecoalcharcanreducetheactivationenergyofNOreductionreactionandexpeditethespeedofthatreaction,thusquickeningtheNOre2ductionspeed.Keywords:reburning,coalchar,NOcatalyticreductionW=ExperimentalStudyofAerodynamicCharacteris2ticsinaW2shapedFlameBoilerEquippedwithaBinandFeederSystemandFedTertiaryHotAirintheBoilerFurnace[,]/YANXiao,XUWei2jiang,SUNXin2guo,HUIShi2en,XUTong2mo(Energy&PowerEngineeringInstituteundertheXianJiaotongUniversity,Xian,China,PostCode:710049)//JournalofEngineeringforThermalEnergy&Power.-2001,16(3).-263266,281WithregardtoaW2shapedflameboilerimportedfromUSFosterWheelerCo.andfittedwithdual2swirlseparationtypepulverizedcoalburnersacoldmodelwassetupbasedonananalogsimulation.Withthehelpofanhot2wireanemometerandbytheuseofatracemethodmeasurementsofin2furnaceaerodynamicfieldweretakenunderdifferentoperatingcon2ditions.Asaresult,obtainedundervariousoperatingconditionswerethevectordiagramsofin2furnaceflowfield,lengthofflame,curvesofin2furnacemaingas2flowdistributionalongthefurnacedepthdirectionandcurvesofvariationofmaingas2flowfilling2fullnessdegree.Onthebasisoftheexperimentalresultsananalysiswasconductedofthein2furnaceaero2dynamiccharacteristics.Theresultsofanexperimentalstudyindicatethatthetertiaryairfedintothefurnaceathighve2locityalongahorizontaldirectionhasasignificanteffectonthein2furnaceaerodynamiccharacteristics.Keywords:W2shapedflameboiler,coldmodelexperiment,aerodynamicfield,dynamicflowrate=ExperimentalInvestigationofHeatTransferCharacteristicsofVerticalSmoothTubesandInternallyRibbedOnesinNear2criticalandSupercriticalPressureZones[,]/HUZhi2hong,CHENTing2kuan,SUNDan(NationalKeyLabofMulti2phaseFlowsundertheXianJiaotongUniversity,Xian,China,PostCode:710049)//JournalofEngineeringforThermalEnergy&Pow2er.-2001,16(3).-267270Presentedinthispaperarethetestresultsoftheheattransfercharacteristicsofverticalsmoothtubesandinternallyribbedonesinnear2criticalandsupercriticalpressurezones.Inthenear2criticalpressurezonetheheattransfercharacteristicsofthesmoothtubeswilldeterioratewhenthepressureincreasestoapproachthecriticalpressure.Thecriticaldrynessofheattransferdeteriorationwillexperienceadrasticreduction.Inextremecasesthereemergesadramaticriseinwalltempera2tureeveninasub2cooledzone.Asforaninternallyribbedtube,itsheattransferdeteriorationinthenear2criticalpres2surezonecanbeeliminated.However,withthepressureapproachingacriticalonethecapacityoftheinternallyribbedtubetosuppressheattransferdeteriorationwilldecrease.Theminimumheattransferfactorofthesmoothtubeandinter2nallyribbedtubeafteraheattransferdeteriorationwilloccurrespectivelyatapressureof21.0MPaand22.0MPa.Aftersurpassingthecriticalpressurethesmoothtubeandtheinte