DRESOR法求解一维散射性非灰介质中辐射传递  

DRESOR method to solve radiative transfer in one-dimensional scattering non-gray media

作　　者：黄志锋 杨水华 程勇 HUANG Zhifeng;YANG Shuihua;CHENG Yong(School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学动力与机械学院,湖北武汉430072

出　　处：《华中科技大学学报（自然科学版）》2022年第5期1-7,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(52076155).

摘　　要：针对一维散射性非灰介质和反射性边界的辐射系统,将被介质散射或壁面反射的能量分布份额(DRESOR)法和统计窄谱带模型(SNB)气体辐射模型相结合,计算分析了不同温度分布、气体浓度分布、颗粒粒径、颗粒数密度等不同介质条件和不同反射特性边界条件下的光谱辐射强度结果.通过与逐线法(LBL)结果对比表明:对含散射性颗粒或反射性边界的辐射系统,在具有明显发射的波段光谱辐射强度误差均小于5%,且在强发射波段误差进一步减小,验证了所提出计算方法的精度.本计算方法弥补了SNB模型不能应用于计算含散射性介质或反射性边界辐射传递过程的局限,为基于图像分析的气相介质燃烧检测技术提供了支撑.Distributions of ratios of energy scattered or reflected(DRESOR)method was combined with the statistical narrow band(SNB)model to calculate directional radiative intensity in one-dimensional radiative systems with non-gray scattering media and reflective boundaries.Cases with different temperature distributions,gas concentration distributions,particle sizes,particle number densities,and boundary reflectivity were investigated.Compared with the results by line-by-line(LBL)method,it is shown that the errors of spectral radiative intensity calculated by the proposed method are less than 5%over bands with significant emission,and the errors are further reduced in strong emission bands,verifying the good accuracy of the proposed method.The proposed method extends the application of SNB model to solve radiative transfer in scattering media or reflective boundaries,and is useful for developing combustion detecting techniques based on image analysis in gaseous media.

关 键 词：DRESOR法 SNB模型 方向辐射强度 气体辐射 散射性颗粒 

分 类 号：TK16[动力工程及工程热物理—热能工程]