摘要
提出了一种由边界出射辐射强度反演吸收散射性三维矩形介质内辐射源项分布的方法。该方法是在辐射传递方程离散坐标近似的基础上，用求目标函数极小值的共轭梯度法进行反演计算。通过对介质辐射特性、光学厚度等参数对反演精度影响的分析，结果表明，即使存在测量误差，本文所提出的方法可较精确地反演辐射源项。
An inverse radiation analysis is presented for estimating the unknown sourceterm in a three-dimensional absorbing, emitting, scattering rectangular medium from theknowledge of the radiation intensities exiting the boundaries. The discrete ordinates methodis used to developed a solution to an inverse radiation problem. The inverse problem is solvedusing conjugate gradient method that minimizes the errors between exit radiation intensitiescalculated and experimental data. The effects of measurement errors, radiative properties,and optical thickness on the accuracy of inverse analysis are investigated. The results ofestimation show that the source term can be estimated accurately, even with noisy data.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2000年第1期71-75,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金!No.59706008
国家杰出青年基金!No.59725617
关键词
辐射反问题
辐射源项
矩形介质
吸收散射
热流
inverse radiation problem
radiative source term
conjugate gradient method
