颗粒弥散型复合材料导热性能的分形分析  

Fractal analysis of heat conduction performance of particle dispersive composite materials

作　　者：李小川[1] 崔晓峰[2] 黄庠永[1] 施明恒[3] 

机构地区：[1]扬州大学能源与动力工程学院.江苏扬州225127 [2]河海大学机电工程学院,江苏常州213022 [3]东南大学能源与环境学院,南京210096

出　　处：《扬州大学学报（自然科学版）》2012年第3期42-45,共4页Journal of Yangzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51079125);江苏省高校自然科学基金资助项目(10KJB470009);扬州大学科技创新培育基金资助项目(2011CXJ038)

摘　　要：采用有限体积方法对颗粒弥散型复合材料分形模型的导热性能进行数值模拟,探讨了不同因素对导热性能的影响规律.研究结果表明:随着导热颗粒填充率的增加,复合材料导热性能呈非线性增大的趋势变化;在填充率相同的情况下,导热颗粒弥散和团聚的形态与方向对导热性能有很大影响;增强颗粒在热流传递方向上的接触性而形成高导热通路是提高复合材料导热性能的主要途径.Control volume method is used to simulate the heat conduction performance of fractal model of particle dispersive composites numerically. The effects of various factors on thermal con- ductivity of composites are studied. Results indicate that thermal conductivities of composites in- crease nonlinearly with the increase of filling fraction of particles. Keeping the filling fraction con- stant, the dispersion and reunion form and direction of particles have significant influence on heat conduction performance of composites. Enhancing the contacts between particles in the direction of heat exchange and forming high heat transfer channels are the main and economical ways to improve heat conduction performance of particle dispersive composites.

关 键 词：颗粒弥散 复合材料 导热性能 分形 

分 类 号：TK121[动力工程及工程热物理—工程热物理]