(1. 南京工業(yè)大學(xué) 機(jī)械與動(dòng)力工程學(xué)院，南京 211816；
2. 南京工業(yè)大學(xué) 能源學(xué)院，南京 211816)
摘 要: 以最小熱阻力法則及比等效導(dǎo)熱系數(shù)法，通過(guò)修正串-并聯(lián)模型，建立含界面熱阻的固-固相復(fù)合材料等效導(dǎo)熱模型，將固-固相復(fù)合材料轉(zhuǎn)換為導(dǎo)熱系數(shù)為等效熱導(dǎo)率的單相固體材料，再利用含孔隙的單相材料導(dǎo)熱系數(shù)模型推導(dǎo)含孔隙和界面熱阻的復(fù)合材料有效導(dǎo)熱系數(shù)。計(jì)算含孔隙及界面熱阻的復(fù)合材料的有效導(dǎo)熱系數(shù)并討論氣孔、分散相的含量及顆粒尺寸對(duì)其有效熱導(dǎo)率的影響。將有效導(dǎo)熱系數(shù)的理論值與相關(guān)實(shí)驗(yàn)數(shù)據(jù)進(jìn)行比較。結(jié)果表明兩者吻合較好，證明公式的準(zhǔn)確性。
關(guān)鍵字: 復(fù)合材料；有效導(dǎo)熱系數(shù)；界面熱阻；孔隙
（1. School of Mechanical and Power Engineering, Nanjing Technology University, Nanjing 211816, China;
2. College of Energy Engineering, Nanjing Technology University, Nanjing 211816, China）
Abstract:Based on the laws of the minimal thermal resistance and the specific effective thermal conductivity, the effective thermal conductivity of solid-solid phase composite material containing interface thermal was established by the modifying the series-parallel connection model. Thus the solid-solid phase composite material was viewed as the single phase solid material that the thermal conductivity is equal to the effective thermal conductivity. Then, the thermal conductivity of the composite material containing pore was derived by the heat transfer model of a single phase material containing pore. The effective thermal conductivity of composite materials containing pore and interface thermal resistance was deduced. And the effects, such as pores, particle size and volume fraction of dispersed phase on thermal conductivity were investigated. The calculation values agree well with the experimental results obtained from the other literature which show the method is effective.
Key words: composite material; effective thermal conductivity; interface thermal resistance; pore
