纳米悬浮液热导率测量及其预测模型的探讨  

MESUREMENT AND MODEL RESEARCH ON THERMAL CONDUCTIVITY OF NANO-SUSPENSIONS

作　　者：李泽梁[1] 李俊明[1] 王补宣[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《工程热物理学报》2006年第1期112-114,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50276030)

摘　　要：纳米颗粒悬浮液具有广泛应用于强化传热的潜在优势。本文采用加入表面活性剂的方法提高纳米悬浮液的悬浮稳定性,并用瞬态热线法测量了热导率。在分析现有理论模型和纳米悬浮液热导率影响因素研究的基础上,从弹性传动和非弹性传动两方面分析了纳米尺度效应导致纳米悬浮液热导率提高的机理。发现已有的理论公式仍然存在一定欠缺,预测值比实验值偏低,有关机理尚有待于深入探讨。Nanoparticle suspensions with high thermal conductivity have potential applications on enhancing convection heat transfer. The thermal conductivity of nano-suspensions with dispersant was measured by using transient hot wire method. Based on the reviews on the theory model and the analysis on affecting factors of conduction, a flexible body concept with elasticity and non elasticity transmission was discussed to analyze the higher enhancement of heat transfer due to the nano scale effect.

关 键 词：纳米颗粒悬浮液 热导率 导热机理 

分 类 号：TK124[动力工程及工程热物理—工程热物理]