侧壁开孔蜂窝夹芯结构的传热性能分析  

Analysis on heat transfer performance of honeycomb sandwich structure with side wall openings

作　　者：郑宁悦 陈学[1] 孙创[1] 夏新林[1] ZHENG Ningyue;CHEN Xue;SUN Chuang;XIA Xinlin(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《航空动力学报》2024年第1期57-62,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(51806046);黑龙江省博士后资助(LBH-Z18081)。

摘　　要：针对侧壁开孔蜂窝夹芯结构,建立了蜂窝单元高温辐射-导热耦合传热模型,采用有限元方法分析了内部传热机制,获得了其高温等效导热系数。讨论了开孔形状、开孔参数、孔排布形式等结构参数对等效导热系数的影响,拟合得到了等效导热系数的计算关联式。研究表明:开孔形状对蜂窝单元等效导热系数几乎无影响;等效导热系数随孔隙率增大而减小,受开孔数影响较小。并联开孔相对于串联开孔时等效导热系数更低,孔隙率14%、孔数为4时等效导热系数比串联时小8.4%,相较于未开孔时降低16.1%。Targeting the new honeycomb sandwich structure with holes on the sidewall,the coupled heat transfer model of high temperature radiation-heat conduction of honeycomb unit was established.The internal heat transfer mechanism was analyzed by using the finite element method,and the high temperature equivalent thermal conductivity was obtained.The effects of structural parameters,such as hole shape,hole parameters and hole arrangement on equivalent thermal conductivity were discussed,and the calculation correlation of equivalent thermal conductivity was obtained by fitting.Studies showed that the hole shape had little effect on the equivalent thermal conductivity of honeycomb cells.The equivalent thermal conductivity decreased with the increase of porosity,which was less affected by the number of holes.The equivalent thermal conductivity of parallel holes was lower than that of series holes.When the porosity was 14%and the number of holes was 4,the equivalent thermal conductivity was 8.4%smaller than that of series holes,16.1%lower than that without holes.

关 键 词：蜂窝结构 高温传热 等效导热系数 侧壁开孔 有限元方法 

分 类 号：V445.1[航空宇航科学与技术—飞行器设计] TK124[动力工程及工程热物理—工程热物理]