%0 Journal Article
%T Two-dimensionalSimulationforHydrogen/AirCombustioninaMonolithReactor
%A 洪若瑜
%A 丁剑敏
%A VlachosDG
%J 过程工程学报
%D 2005
%X Recentstudiesonhydrogencombustionwerereviewedbriefly.Thelaminarflowandcombustionofpremixedhydrogen/airmixtureinacylindricalchannelofamonolithreactorwithandwithoutcatalyticwallwasnumericallymodeledbysolvingtwo-dimensional(2-D)NavierStokes(NS)equations,energyequation,andspeciesequations.Eightgasspeciesandtwentyreversiblegasreactionswereconsidered.ThecontrolvolumetechniqueandtheSIMPLEalgorithmwereusedtosolvethepartialdifferentialequations.Thestreamlinesoftheflowfield,temperaturecontours,theentrancelength,andtheconcentrationfieldswerecomputed.Itisfoundthattheentrancezoneplaysanimportantroleonflowandtemperatureaswellasspeciesdistribution.Therefore,theflowcannotbeassumedeitherasfullydevelopedorasplugflow.Thereisasmallbutstrongthermalexpansionzonebetweenthewallandtheentrance.Bothdiffusionandconvectionaffecttheheatandmasstransferprocessesintheexpansionzone.Thustheequationsofmomentum,energyandspeciesconservationsshouldbeusedtodescribehydrogen/aircombustioninthemonolithreactor.Thehot-spotlocationandconcentrationfieldofthehomogeneouscombustionisstronglyinfluencedbytheinletvelocityandtemperature,andtheequivalenceratio.Thecatalyticcombustionofpremixedhydrogen/airmixtureoverplatinumcatalyst-coatedwallinacylindricalchannelwasalsosimulated.
%K micro-reactor
%K monolith
%K combustion
%K catalysis
%K hydrogen
%K simulation
%U http://www.jproeng.com/qikan/Cpaper/zhaiyao.asp?bsid=732