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基于支板的超燃冲压发动机燃烧室模态转换过程参数化研究（英文）.docx

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基于支板的超燃冲压发动机燃烧室模态转换过程参数化研究（英文） ParameterizedStudyonModalTransformationProcessofSupercriticalRamjetCombustionChamberBasedonSupportPlate Abstract: Inthispaper,aparameterizedstudyonthemodaltransformationprocessofthecombustionchamberofasupercriticalramjetbasedonthesupportplateispresented.Themodaltransformationprocessisacrucialfactorthataffectstheperformanceofthecombustionchamberandtheentireengine.Therefore,thisstudyaimstoinvestigatetheeffectsofvariousparametersonthemodaltransformationprocessandoptimizethedesignofthecombustionchamber. Introduction: Supercriticalramjetengineshavebeenwidelyusedinhypersonicflightduetotheirhighthrust-to-weightratio,highspecificimpulse,andhigh-speedoperation.Thecombustionchamberisoneofthemostcriticalcomponentsofaramjetengine.Itisresponsibleformixingandburningthefuelandairandconvertingthechemicalenergyofthefuelintothermalenergytogeneratethrust. Oneofthemostsignificantfactorsaffectingtheperformanceofthecombustionchamberisthemodaltransformationprocess.Modaltransformationreferstotheprocessbywhichthecombustionchamberoscillatesfromalow-frequencymodetoahigh-frequencymodeastheengineaccelerates.Themodaltransformationprocesscanleadtoinstabilityandvibration,whichcanaffectthecombustionefficiencyandevenleadtoenginefailure. Inthisstudy,aparameterizedmodelofthecombustionchamberbasedonthesupportplateisdevelopedtoinvestigatetheeffectsofvariousparametersonthemodaltransformationprocess.Thesupportplateisacriticalcomponentthatconnectsthecombustionchambertotheinletandthenozzle.Theparametersunderinvestigationincludethethicknessofthesupportplate,thediameteroftheinlet,thelengthofthecombustionchamber,andthefuelinjectionpressure. Methodology: TheparameterizedmodelofthecombustionchamberisdevelopedusingthefiniteelementmethodandANSYSFluentsoftware.Themodelconsistsofasupportplate,aninlet,acombustionchamber,andanozzle.Thedimensionsofthemodelarebasedonatypicalsupersonicramjetengine. ThemodaltransformationprocessissimulatedusingANSYSFluentsoftwarewithadynamicmesh.Thestandardk