| 吸收散射性三维矩形介质内辐射源项的反问题 |
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| 引用本文： | 刘林华,谈和平,余其铮. 吸收散射性三维矩形介质内辐射源项的反问题[J]. 工程热物理学报, 2000, 21(1): 71-75 |
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| 作者姓名： | 刘林华 谈和平 余其铮 |
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| 作者单位： | 哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 |
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| 基金项目： | 国家自然科学基金!No．59706008，国家杰出青年基金!No.59725617 |
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| 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。
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| 关 键 词： | 辐射反问题 辐射源项 共轭梯度法 |
| 文章编号： | 0253-231X(2000)01-0071-05 |
| 修稿时间： | 1999-05-07 |
INVERSE RADIATION PROBLEM OF SOURCE TERM IN THREE--DIMENSIONAL ABSORBING AND SCATTERING RECTANGULAR MEDIA |
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| LIU Linhua,TAN Heping,Yu Qizheng. INVERSE RADIATION PROBLEM OF SOURCE TERM IN THREE--DIMENSIONAL ABSORBING AND SCATTERING RECTANGULAR MEDIA[J]. Journal of Engineering Thermophysics, 2000, 21(1): 71-75 |
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| Authors: | LIU Linhua TAN Heping Yu Qizheng |
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| Affiliation: | LIU Linhua,TAN Heping,YU Qizheng(School of Energy Science & Engineering, Harbin Institute of Technology, Harbin 150000, China) |
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| Abstract: | 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. |
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| Keywords: | inverse radiation problem radiative source term conjugate gradient method |
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