摘要
对具有内热源的复合材料点阵夹芯结构的流体流动和热传输特性进行了数值研究,采用等效热网络法和以结构槽道高度为度量的无量纲参数分别对结构的热源热场和主动换热性能进行了分析和表征,揭示了流体流动及热源温度对芯体杆件倾角变化的响应,给出了一定热流密度下倾角与热源最高温度之间的函数关系,并对基于倾角的结构热/力性能进行了初步的优化分析。结果表明,该复合材料点阵夹芯结构具有优异的主动换热特性,且随着杆件倾角的增大,结构的换热效率提高,结构最高温度降低。
A numerical study on fluid flow characteristics and heat transfer performance of composite lattice truss core sandwich structure with a constant localized internal heat source was presented. The thermal resistance network and the non- dimensional parameters measured by the channel height were respectively adopted to analysis and characterize the thermal field of heat source and active cooling performance. The effects of inclination angle on fluid flow and temperature of heat source were explored. An optimization analysis of thermo-mechanicaI performance was carried out based on the relationship between inclination angle and the maximum temperature of heat source. The results suggest that this composite sandwich structure has excellent active cooling performance, and with an increase of inclination angle, the heat transfer efficiency is improved, leading to a reduction of structural maximum temperature.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2013年第5期180-186,共7页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(10972069
11272103)
教育部高等学校博士学科点专项科研基金(2011230211006)
关键词
夹芯结构
主动换热
热网络法
最高温度
优化分析
sandwich structure
active cooling performance
thermal resistance network
maximum temperature
optimization analysis
