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垂直着陆过程推进剂流动行为特性及影响分析 Title:CharacteristicsandImplicationsofPropellantFlowBehaviorinVerticalLandingProcess Introduction: Verticallandingisacriticalmaneuverinspaceexplorationandaerospaceindustries,allowingrocketsandspacecrafttolandsafelyandreusepropulsionsystems.Duringtheverticallandingprocess,theflowbehaviorofpropellantsplaysavitalroleinachievingprecisecontrol,stability,andsafety.Thispaperaimstoanalyzethecharacteristicsofpropellantflowbehaviorduringverticallandingsanditsimplications. 1.PropellantTypesandFlowBehavior: 1.1LiquidPropellants: Liquidpropellants,suchasrocket-gradekerosene(RP-1)andliquidoxygen(LOX),arecommonlyusedinrocketengines.Theverticallandingprocessinvolvesthecontrolledinjectionofthesepropellantstostabilizethedescentandcontrollandingaccuracy.Theflowbehavioranalysisincludesconsiderationsofpropellantviscosity,density,andotherphysicalproperties,aswellastheirinteractionwithrocketenginesandassociatedsystems. 1.2HybridPropellants: Hybridrocketscombinesolidandliquidpropellants,whereasolidfuelgrainisignitedalongwiththeflowofliquidoxidizer.Inverticallandings,understandingtheflowcharacteristicsofliquidoxidizer,suchasnitrousoxide(N2O),isessentialforsafeandcontrolledlandings.Theanalysisinvolvesfactorslikevaporization,combustion,andinteractionwiththesolidfuelgrain. 1.3GaseousPropellants: Somerocketsemploygaseouspropellants,suchasliquefiednaturalgas(LNG)orcompressedair.Thesepropellantshaveuniqueflowbehaviorcharacteristicsduringtheverticallandingprocess.Analysisincludestheimpactofdifferentvalveconfigurations,gasexpansion,andpressurecontroltoensurestabilityandminimizethechancesofaccidents. 2.FlowBehaviorAnalysis: 2.1FlowPatternsandStability: Theflowbehavioranalysisfocusesonunderstandingvariousflowpatterns,includinglaminarandturbulentflowregimes.Stabilityconsiderationsexplorethepresenceofinstabilities,suchasflowseparation,recirculation,orshockwaves,thatmayaffectthecontrolandaccuracyofaverticallanding.Factorsaffectingstability,suchasfluidproperties,injectionangles,andfl

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