基于透射法的泡沫金属热辐射特性测量方法  

Measurement Method for the Thermal Radiation Properties of Metallic Foam Based on Transmission Method

作　　者：刘梦[1] 艾青[1] 陈冠宇 夏新林[1] LIU Meng;AI Qing;CHEN Guan-Yu;XIA Xin-Lin(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

出　　处：《工程热物理学报》2019年第6期1408-1411,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51676055);国家自然科学基金重点项目(No.51536001)

摘　　要：泡沫金属材料通常属于半透明介质,本文考虑热辐射传输中泡沫金属块材的边缘效应,引入高温热辐射特性测量中的多层结构模型并结合透射法测量热辐射特性的双厚度方法,将泡沫金属材料划分为边缘层、介质层等结构层,建立了边缘层-介质层-边缘层的三层结构模型,基于辐射传输过程获得了泡沫金属块材热辐射特性的求解方法.基于该方法,采用FTIR光谱仪对某孔隙下泡沫镍的热辐射特性进行了实验测量,并与忽略边缘效应的计算结果进行对比,发现边缘效应的存在会明显影响材料整体的热辐射特性参数。Metallic foam belongs to semitransparent medium. Considering the edge effect of metallic foam bulk in the thermal radiative transfer process, this paper introduced multi-layer structure model from thermal radiative measurements under high temperature combined with the double-thickness method based on transmittance method, and established the solving method for the thermal radiative properties of metallic foam bulk with the edge-medium-edge three-layer structure. Based on this method, the thermal radiative properties of a foam nickel sample with a certain porosity were measured by FTIR spectrometer. Then the results are compared with those obtained without considering the edge effect, finding that the edge effect has significant influence on the thermal radiative properties of metallic foam.

关 键 词：泡沫金属 边缘效应 透射法 热辐射特性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]