锅炉干式除渣机内空气流动的数值模拟

25Vol.25Sup200510JOURNALOFPOWERENGINEERINGOct.20052221Fig.1Diagrammaticsketchofdryslagdisposalke-SHIJian,YANGMo,LiLing,SHANYan-guang,TIANLi-jun(UniversityofShanghaiforScienceandTechnologyCollegeofPower,Shanghai,200093)Inthispaper,numericalsimulationsusingSIMPLEalgorithmwithQUICKschemeandRNGke-turbulencemodel,andanexperimentiscarriedoutfortheairflowindryslagdisposalsystem.Forairleakageinactualexperiment,thenumericalresultsofinletvelocityarelittlelargerthanexperimentresultsofinletvelocity,buttakingonewithanother,thenumericalresultshavecorrespondencewiththeexperimentonesbasically.Atonetime,theairflowindifferentpressure-dropissimulated,andthenregularitybetweenair-flowrateandpressure-dropisgiven,whichindicates,inregionofconsideredparameter,alongwithpressure-dropaugmentation,air-flowrateincreasesalmostlinearly.EngineeringThermophysics;DrySlagDisposal;NumericalSimulation;Boiler15027603703GK08198125Vol.25Sup200510JOURNALOFPOWERENGINEERINGOct.2005223[1][2]2212ke-[3][4]ke-RNGke-()()()()xyzVVVStxyzxxyyzzfffffffrfrfrfrf∂∂∂∂∂∂∂∂∂∂++=Γ+ΓΓ+∂∂∂∂∂∂∂∂∂∂++⎛⎞⎛⎞⎛⎞⎜⎟⎜⎟⎜⎟⎝⎠⎝⎠⎝⎠,,SfffΓffΓSf100Xueffm()23effeffeffPuvwKxxxyxzxxmmmr∂∂∂∂∂∂∂∂-+++-∂∂∂∂∂∂∂∂⎛⎞⎛⎞⎛⎞⎜⎟⎜⎟⎜⎟⎝⎠⎝⎠⎝⎠Yveffm()23effeffeffPuvwKyxyyyzyymmmr∂∂∂∂∂∂∂∂-+++-∂∂∂∂∂∂∂∂⎛⎞⎛⎞⎛⎞⎜⎟⎜⎟⎜⎟⎝⎠⎝⎠⎝⎠Zweffm()23effeffeffPuvwKzxzyzzzzmmmr∂∂∂∂∂∂∂∂-+++-∂∂∂∂∂∂∂∂⎛⎞⎛⎞⎛⎞⎜⎟⎜⎟⎜⎟⎝⎠⎝⎠⎝⎠KeffKmskGre-eeffems20123(1)1KkCGCGKKkhhheeerbh---+effTmmm=+2TCKmmre=2Fig.23Dsimulationmodelfordryslagdisposal25Vol.25Sup200510JOURNALOFPOWERENGINEERINGOct.20052243Fig.3Vectordiagramonlongitudinalsection22222;keffuvwGxyzuvwyxzm∂∂∂=××+++∂∂∂∂∂∂++∂∂∂⎡⎤⎛⎞⎛⎞⎛⎞⎢⎥⎜⎟⎜⎟⎜⎟⎝⎠⎝⎠⎝⎠⎢⎥⎣⎦⎛⎞⎜⎟⎝⎠12keffGkhme=⎛⎞⎜⎟⎜⎟⎝⎠Cm0.0085DC1.01C1.422C1.68Ks0.07179es0.071790h4.38b0.015ke-RNGke-Boussinesq2TCKmmre=ke-ke-RNGke-ke-RNGke-1C130QUICKSIMPLE110100inPpa=()22_12inairinkIv=I()180.16ReHDI-=2334kClme=l210050outPpa=Re25Vol.25Sup200510JOURNALOFPOWERENGINEERINGOct.20052254Fig.4DatacomparebetweenexperimentandsimulationpapapapapapapapapapapapapaChoSM.FurnaceCombusionandheattransferinlargeutilityboilers.In:GFHewitted.Proceeingsofthe11thIntHaetTransferConf.Kyongju.1:180-188,19986Fig.6Air-flowindifferentpressuredrop25Vol.25Sup200510JOURNALOFPOWERENGINEERINGOct.2005226[4]YakhotV,OrszagSA.Renormalization-GroupAnalysisofTurbulencePhys.Rev.Lett.57:1722–1724,1986[5]PantankarSV.NumeriacalHeatTransferandFluid