金属泡沫传热性能分析与散热结构优化设计

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1、大连理工大学硕士学位论文金属泡沫传热性能分析与散热结构优化设计姓名：朱贺申请学位级别：硕士专业：工程力学指导教师：刘书田20090601金属泡沫传热性能分析与散热结构优化设计本文工作由国家重点基础研究(973)计划(2006CB601205)、国家自然科学基金(90605002，10721062，90816025)和教育部新世纪优秀人才支持计划(NCET．04．02721资助．关键词：对流散热；金属泡沫；Led灯；散热结构设计大连理工大学硕士学位论文Heat—TransferAnalysisofMetal

2、FoamandOptimizationDesignofHeatDissipationStructureAbstractWiththerapiddevelopmentofindustrialequipmentandaerospacetechnology,designandpreparationofhigh-performanceengineeringmaterialsbecomemoreimportant．AsanewkindofUltra-lightCellularMaterials，metalfoamc

3、allbeusedincompactheatexchangersforairborneequipments，heatsinksforpowerelectronicsinthethermalmanagementduetoitspredominateperformance，suchaslow—density，largesurfaceareainalimitedvolume，highthermalconductivityofthecelledgesandtheabilitytomixthecoolingflui

4、dbypromotingeddies．Therefore，itisatheoreticandapplicationissuetostudyhowthefoampropertiesaffecttheheat-transferperformancebyusingeffectivemacroequivalentmodels．Asthedevelopmentoftheelectronicequipmenttowardintegrationandminiaturizationandtheincreasingofth

5、epowerdensity,thermalmanagementbecomesoneofleadingproblemsthatlimitthedevelopmentofthedcctronicequipment．ItisdesiredtodevelopelectronicequipmentswithabetterthermalstructureandinternalflowfieldwhichCanimprovetheheatdissipationcapability，reducetheimportantc

6、omponent’temperatureandincreasethestabilityandlife．Forthebackgroundmentionedabove，heattransferanalysisofopen-cellmetalfoamandthermalstructuraloptimizationdesignofelectronicequipmentarediscussedinthispaper．111emainworkincludes：(1)Anewmethodforforced·convec

7、tionheattransferofopencellmetalfoam：TransferMatrixMethod．Thischapterfocuses013．theforced-convectionheattransferofopencellmetalfoam．Atransfermatrixmethodforheattransferperformanceofopen-cellmetalfoamundertheforcedconvectionispresented．Thetransfermatrixmeth

8、odbasesoncubecellmodelandconsidersmetalfoamasstructureswithperiodicmicrocells．Within—depthheattransferanalysisonmicrostructureandconsideringthechangeoffluidtemperaturesimultaneously，therelationshipbetweenintegralhea