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1、碩士學位論文!==!!====!=!=====!!===!=!!========!==!!!!===========!=====!!!!=!======================AbstractWiththedevelopmentofeconomy，energyshortagebecomesmoreandmoreobvious，lookingforhighefficiencycombustorhasbecomethedevelopmentdirectionofscientists，andhasmultipleadvantagesofmicroscale
2、combustionhasreceivedwideresearchers’attentionallovertheworld．MicroscalecombustioniSthefuelcombustionreactioninmicrospace．Researchonmicro．combustioninvolvesmultipledisciplinesincludingheattransfertheory，combustiontheory，andchemicalreactiondynamicsandSOon．Differentfromtheconventiona
3、lspatialscalecombustion，thecombustionstability，combustionefficiency，heatlossandcombustioncharacteristicsareverydifferent．Therefore，numericalsimulationwasusedtostudytheworkconditionandcombustionpropertiesofmethanesteptype，thefieldsynergyofmicrocombustorwasanalyzed，thecombustorchambe
4、randthestep—angleisoptimized，andthecombustionchamberandthestep-anglewasoptimizedbymultidisciplinarydesignoptimizationtheory．whichwillprovidereferencevalueforresearchofmicrocombustor．Themaininnovationandresearchworkinthepaperwereexpressedasfollows：(1)Amathematicalmodelofmethanecombu
5、stionladdertypemicrocombustorwasestablished，andthemethanecombustionofmicrocombustorindifferententrancevelocities，wallmaterialsanddifferentburnerstructureswassimulatedandanalyzed，whichresearchedthemethanecombustioncharacteristicsand1awofmicrocombustor．(2)Amicro-combustormodelofstept
6、ypewasanalyzedbymulti-fieldsynergymethod，thelawthatthermalefficiencyofmicro—combustorwasthebestwasrevealedwhenthesynergybetweenthevelocityvectorfieldandtemperaturegradientfieldwasoptimal，andtheinfluenceofdifferententrancevelocityandexcessaircoefficientonthecombustiontemperaturefiel
7、dswereobtained．(3)Themultidisciplinarydesignoptimizationmodelwasestablishedwiththeobjectivefunctionofthecombustorchamberlengthandstep-angleofmicrocombustor．Adaptivechaosoptimizationalgorithmwasusedtosolveweightsfactorofmulti—disciplinarydesignoptimization．Theresultsshowthatthecombu
8、stionperformanceofmicrocom
