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结构重叠网格方法在航天气动问题中的应用.docx

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结构重叠网格方法在航天气动问题中的应用 摘要： 结构重叠网格方法是一种高效、准确、稳定的数值计算方法，已经在航空航天领域得到广泛应用。本文首先介绍了结构重叠网格方法的原理和优势，然后重点讨论其在航天气动问题中的应用。具体包括推力偏角、热气流分析、飞行控制系统设计等方面。最后，总结了结构重叠网格方法的优缺点和面临的挑战。 关键词：结构重叠网格方法；航天气动问题；推力偏角；热气流分析；飞行控制系统设计 Introduction Structureoverlappinggridmethodisanumericalcalculationmethodwhichisefficient,accurate,andstable.Ithasbeenwidelyusedinaerospacefield.Inthispaper,wewillintroducetheprincipleandadvantageofthestructureoverlappinggridmethod,andthendiscussitsapplicationinaerospaceaerodynamicproblems,suchasthrustangle,thermalflowanalysis,flightcontrolsystemdesignandsoon.Finally,wewillsummarizetheadvantagesanddisadvantagesofthestructureoverlappinggridmethodandthechallengesitfaces. PrinciplesandAdvantagesofStructureOverlappingGridMethods Structureoverlappinggridmethodsarewidelyusedinthecalculationofcomplexflowfields.Thebasicideaofthestructrureoverlappinggridmethodistodividethedomainintoseveralsubdomains,eachofwhichismappedontoaseparategrid.Thegridsoverlapattheboundariesofthesubdomains,andtheoverlappingpointsarecreatedbymatchingthegridsalongtheinterfaces.Thegridpointsarethenusedtosolvethegoverningequationsoftheflowfield. Comparedwithothernumericalmethods,thestructureoverlappinggridmethodhasmanyadvantages.Firstly,itcandealwithcomplexgeometriesandirregulardomains.Secondly,itcanachievehighaccuracy,eveninregionsofflowseparationorstronggradients.Thirdly,itiscomputationallyefficient,andcancalculatelargedomainswithminimaltimeandmemoryrequirements.Finally,itisflexibleandeasilyadaptabletodifferenttypesofproblems. ApplicationsinAerospaceAerodynamicProblems 1.ThrustAngle Thrustangleisanimportantparameterforthestabilityandcontrolofaerospacevehicles.Thethrustangledeterminesthedirectionandmagnitudeofthepropulsiveforceactingonthevehicle.Calculationofthrustanglerequiresconsideringtheinteractionbetweenthepropulsionsystemandtheaerodynamicflow.Thestructureoverlappinggridmethodhasbeenusedtocalculatethethrustangleofaerospacevehicles.Themethodinvolvessolvingthegoverningequationsfortheflowfield,andthencalc