燃烧流体力学(1)

NLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]SSTRANSFERINCOMBUSTIONPROCEDURENLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]参考书周力行《湍流两相流动与燃烧的数值模拟》，清华大学出版社，1991年。周力行《湍流气粒两相流动和燃烧的理论与数值模拟》，1994年。范维澄，万跃鹏《流动及燃烧的模型与计算》，中国科技大学出版社，1992年。盖得·希特斯洛尼《多相流动和传热手册》，机械工业出版社，1993年NLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]参考书（续）王应时，范维澄，周力行，徐旭常《燃烧过程的数值计算》，科学出版社，1986年。岑可发，樊建人《工程气固两相流动的理论及计算》，浙江大学出版社，1990年。NLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]1Introduction§IBasicProceduresCombustionHydrodynamicsHeatTransferMassTransferChemicalReactionPhysicalProceduresChemicalProcedureNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]:IndividualProceduresTotalProcedureNote:TotalProcedure≠∑individualProceduresNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]§II.BasicEquations1.ReynoldsTransportPrinciple1)Twotreatmentmethodsa)Eulermethod-variationofdefinedspacepointb)Lagrangemethod-variationofdefinedfluidelementRelation(forafluidelement)jjxvtdtdNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail],consideraparticularquantity,,forcontrolvolumeV,viVtxt,VariationrateofalongrueofcontrolvolumeVjjVjjVVVVVvxtVxvDtDVVDtVDVDtDVDtDVDtDDtDNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail].e.VvxtVDtDVjjVorSndSvtDtDThisiscalledReynoldsTransportPrinciple.ItmeansthevariationrateoftheintergralofinthecontrolvolumemovedalongrueequalsthechangewithtimeplusthevarationintroducedbyconvectioninEulercoordinateNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]onlaw0VVSDtDWhereSisthesourcetermof2.ContinueEquationwithr,S=0,000jjjjxvDtDvxtDtDrrrrorNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]=rs=Ysr,andVsSsVVwdSjVS0VsjsjVsVwxjVYDtDrWithReynoldstransportlowandFickLawjsjjsjVjsjsVsxYDxxjVvYxYtVYDtDrrrrNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]onforscomponentsjsjjsjswxYDxvYxYtrrr∵0sw∴Thesumofmassconversionequationsisequaltozero.NLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]=rviVFxpDtDVFxpVSVsisjijVsisjijVrrWithReynoldstransportprincipleandNewton’sviscouslowijijjiijVijjjVipxvxvpVvvxvtVvDtDrrrNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]sisijjijiiFxvxvxxpDtDvrrVolumeforcemaybegravityforcergi,elctricityforceandmagneticforceNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]re,ee+v2/2ByReynoldstransportprincipleandcontinueequationVvjjVVjjVDtDVxvDtDVvxtVDtDerrerererereNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]olumebyconduction,convection,radiationanddiffusionSrjsjsVjjVqhxYDxTxr)WorkofvolumeforceVVFFvVvFVVssssssssrrrWherevsisrelativevelocityofcomponentstocombinedgasvvVssNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]SViijjnVvpxdSvpSo,jijjsissisijrjssjsjjjvpxFFvxqhxYDxxTxveDtDrrrr22NLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]§IIIDimensionlessParametersWithdimensionanalysisForfluidflowauTcurgyThermalEneergyMomentumEnMaLuLuLurgyViscousEnergyInatialEneupuLpMomentumessureEup2///Re/Pr2222rrrNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail]PrRe///2rrppcLuLTLTcuHeatConductionHeatConvectionPeForcombustioncdssIIcfpssILTQwactionTimeimeDiffusionTconductionreactionDLTcuQwactionTimeFlowTimeconvectioreactionDr/Re/ReNLCCNationalLab.ofCoalCombustion,HUSTWuhan430074,P.R.CHINAE-mail:[e-mail],DII-DamkohlernumbersDII～f(DI,Pe)FortwolowMacombustionsystems,whenRe=const.Pr=const.DI=const.Theyaresimilar.