采用数值方法对炉内辐射传热公式计算模型的修正  

Modification of the Engineering Algorithm for Radiative Heat Transfer in Furnace by Numerical Method

作　　者：刘海东 韩亚芬 陈学[2] 周怀春 LIU Haidong;HAN Yafen;CHEN Xue;ZHOU Huaichun(School of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China;School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;School of Low-carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou 132012,China)

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012 [2]哈尔滨工业大学能源科学与工程学院,哈尔滨150001 [3]中国矿业大学低碳能源与动力工程学院,徐州221116

出　　处：《工程热物理学报》2023年第10期2842-2848,共7页Journal of Engineering Thermophysics

基　　金：国家重大科研仪器研制项目(No.51827808)。

摘　　要：辐射传热是工业炉内的主要传热方式。尽管目前已具备其数值计算条件,然而,由于采用经验公式计算简单,易于反复校核,经验公式仍是工业炉设计初期计算辐射传热的主要手段。经验公式中的经验系数是影响其结果精度的关键因素,因此,本文采用数值模拟结果对传统炉内辐射传热计算模型(经验公式)予以修正。在参与性介质吸收系数为0.3 m^(-1),光学厚度为4.5(边长为15 m)的立方体辐射传热模型中,本文修模型可使误差由11.26%将至1.74%,并且将计算模型的适用范围由纯吸收介质拓展到散射介质了中,当光学厚度约为4.5,当散射反照率小于10%时,其误差小于2%。Radiative heat transfer is the main heat transfer mean in industrial furnaces.Although the numerical calculation conditions are available,the engineering algorithms are still the main methods of calculating radiative heat transfer in the early stages of industrial furnace design due to their simplicity and ease of repeated verification.The empirical coefficient of the engineering algorithms is a key factor affecting the accuracy.Therefore,the traditional engineering algorithms of the furnace radiative heat transfer are modified by numerical simulation result in this paper.In the cubic with the participating medium of the absorption coefficient of 0.3 m-1 and the optical thickness of 4.5(side length of 15 m),the error of radiative heat transfer of this modified algorithm can be reduced from 11.26%to 1.74%,and the application scope of the algorithms are expanded from pure absorption medium to scattering medium.When the optical thickness is about 4.5 and the scattering albedo is less than 10%,the error is less than 2%.

关 键 词：炉内传热 辐射传热精度 辐射传热工程计算 高温辐射传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]